• Applied Magnets is the #1 leading wholesaler of permanent rare earth industrial magnets, ferrite ceramic magnets, magnetic assemblies, magnet tools made with neodymium rare earth magnets, effective magnetic water treatment system made with the most powerful neodymium rare earth magnets and magnetic accessories and Magnetic Levitation Science Projects. (magnet4less.com)
  • It is highly recommended that when constructing rare earth magnetic assemblies, they be magnetized after assembly. (china-magnet.net)
  • We fabricate and custom-produce a comprehensive line of permanent magnets and precision assemblies specific to design requirements in a number of markets, including: aerospace & defense, medical devices, motorsports and oil & gas. (magnosphere.com)
  • Magnosphere is a leading global manufacturer of high performance magnets, magnetic assemblies and precision thin metals. (magnosphere.com)
  • Large ceramic block magnets are often used in applications where a permanent high-strength magnetic field is required, such as separation and sweeping assemblies. (modernmagnets.co.za)
  • Ferrites are also used in applications where their magnetism can be amplified, such as assemblies, ie: pot magnets, round base magnets (shallow pot magnets). (modernmagnets.co.za)
  • 6. NdFeB magnet surface coating protection, with a certain anti-rust corrosion resistance, but if not used in time, be sure to keep away from the high temperature and corrosive environment. (magnetsmagnets.store)
  • Even though they exhibit low energy (compared with other permanent magnet materials) and are relatively brittle and hard, ferrite magnets have won wide acceptance due to their good resistance to demagnetization, excellent corrosion resistance and low price per Ton. (nibboh.com)
  • The corrosion resistance of ceramic magnet is excellent among all magnetic materials. (sourcemagnets.com)
  • In terms of the magnetic properties, ferrites are often classified as "soft" and "hard" which refers to their low or high coercivity of their magnetism, respectively. (chinamagnets.com)
  • Magnets that can maintain their magnetism for a long time are called permanent magnets, such as natural magnets (magnetite) and artificial magnets ( aluminum - nickel - cobalt alloy), etc. (stanfordmagnets.com)
  • However, if the permanent magnet is heated above the Curie temperature or in an environment with high reverse magnetic field strength, its magnetism will also decrease or disappear. (stanfordmagnets.com)
  • Learn the basic physics principles and investigate the Physics and magnetism by doing experiments with these magnets kit set. (ontogoxer.com)
  • Sntieecr #ad - Learn basic physics principles and conduct experiments with these magnet kits to study physics, magnetism and understand the earth. (ontogoxer.com)
  • Wide applications: the magnet set provides basic accessories for magnetism, rulers, paper, you only need some small tools in life to complete related experiments: such as pens, and you can use your creativity to complete related experiments. (ontogoxer.com)
  • This school science magnets allows children to learn basic physics principles and use these magnet sets to conduct experiments to study physics, science education, magnetism and understand the earth. (ontogoxer.com)
  • This magnetic field interacts with the magnetic field generated by the magnet on the speaker, and this force causes the coil to vibrate with the audio current in the permanent magnet magnetic field on the speaker. (stanfordmagnets.com)
  • When the steel strings of an electric guitar move or vibrate near the pickup, the steel interacts with the magnetic field and induces a current in the wires wrapped around the magnet. (buzzharmony.com)
  • The particular temperatures and presence of vacuum or inert gas is specific to the type and grade of magnet being produced. (magnosphere.com)
  • Material and grade are two terms that refer to the properties of a magnet. (abcxsaa.com)
  • Devens USA's stock magnets are mostly Grade N40 Neodymium Iron Boron. (abcxsaa.com)
  • Being made with high-grade steel, Magnetic Grill withstands extremities and lasts for years in all conditions. (kumarmagnetind.com)
  • Each grade of Alnico has specific magnetic properties and its own sonic character. (taxmed.com.pl)
  • You can find more from our Ferrite Magnet Grade Page. (sourcemagnets.com)
  • It is the first choice for most types of DC motors, magnetic separators, magnetic resonance imaging and automotive sensors. (nibboh.com)
  • In Summary ceramic magnets are used in nearly every single industry thinkable, from simple applications like fridge magnets, magnetic locks, magnetic sweepers and separators to complex refined magnetic applications such as generators and Eddy Current Devices. (modernmagnets.co.za)
  • Alnico magnet material is made by alloying aluminum, nickel and cobalt with iron. (dextermag.com)
  • Cobalt (Co) is a chemical element, and its atomic number 27, ferromagnetic metal of Group 9 (VIIIb) of the periodic table, used especially for heat-resistant and magnetic alloys. (assignmentpoint.com)
  • In pure form, cobalt is silvery-blue and brittle. (assignmentpoint.com)
  • As a result, some high-powered magnets are made from alloys of cobalt and aluminum or nickel, according to the Royal Society of Chemistry. (assignmentpoint.com)
  • Cobalt is primarily used in lithium-ion batteries, and in the manufacture of magnetic, wear-resistant and high-strength alloys. (assignmentpoint.com)
  • With alnico 5 magnets, you get less nickel and aluminum and more cobalt in the mix. (taxmed.com.pl)
  • The only materials that will redirect magnetic fields are materials that are ferromagnetic (attracted to magnets), such as iron, steel (which contains iron), cobalt, and nickel. (smagnetic.com)
  • When a small amount of Co cobalt is added, the bending strength of the permanent magnet is improved. (meank-magnet.com)
  • Alnico is a magnetic combination of aluminum, nickel, and cobalt (Al-Ni-Co) and has been used in guitar pickups since the earliest days of manufacture. (buzzharmony.com)
  • The intrinsic coercive force of N38 neodymium magnets is over 30,000 Oe. (china-magnet.net)
  • It has super strong magnetic force and high intrinsic coercive force and after concocting , it's working temperature can reach to as high as 80 centigrade. (china-magnet.net)
  • Neodymium magnets have extremely resistance to demagnetization with Hci, Intrisic coercive force, over 12,000 Oe. (china-empire.com)
  • Rare earth permanent magnet NdFeB is a new kind of magnetic material developed in the 1980's with excellent magnetic characteristics (high energy product and high coercive force etc.) and relatively low cost. (sonnecy-shop.com)
  • There are several processes for making magnets, but the most common method is called Powder Metallurgy. (magnosphere.com)
  • There are several methods for compacting the powder and they all involve aligning the particles so that in the finished part all the magnetic regions are pointing in a prescribed direction. (magnosphere.com)
  • Because the small powder particles are elongated in the direction of magnetic alignment, transverse pressing yields better alignment, thus a higher energy product. (magnosphere.com)
  • The main advantages to making magnet blocks via isostatic pressing is that very large blocks can be made - frequently up to 100 x 100 x 250 mm and since pressure is applied equally on all sides, the powder remains in good alignment producing the highest possible energy product. (magnosphere.com)
  • A rubber resin is suspended with ferrite magnetic powder. (abcxsaa.com)
  • They achieved it by adding a tiny amount of magnetic iron oxide into the aluminium oxide powder particles and then incorporating a magnet to keep the powder in place. (nanowerk.com)
  • However, if you want to use ferrite magnet for clean, non-contaminated applications, coating may be required because of rough surface of ferrite magnets may have chippings and fine powder. (sourcemagnets.com)
  • It is similar to iron and nickel, according to the Environmental Protection Agency, and like iron can be made magnetic. (assignmentpoint.com)
  • Thicker rods of the material can be threaded which is also something that is not possible with the more commonly used magnetic materials. (wikipedia.org)
  • High induction levels with good resistance to demagnetization and stability, due to its low temperature coefficient (0.02% / °C), at a reasonable cost made Alnico the magnet material of choice. (dextermag.com)
  • To minimize the volume of magnet material required by an application, the entire magnetic circuit must be considered. (dextermag.com)
  • 4. The magnet material is hard and brittle. (shopmakura.com)
  • Neodymium magnet is a new kind of magnetic material developed with excellent magnetic characteristics. (cndailymag.com)
  • Unlike ferrite, which is a ceramic material, all of the rare earth magnets are metal alloys. (magnosphere.com)
  • Neodymium magnets must be carefully handled to avoid personal injury and material damage due to its extremely magnetic strength and brittle property. (china-empire.com)
  • Rare earth permanent magnet NdFeB is a new kind of magnetic material developed in the 1980's. (sonnecy-shop.com)
  • It can be described as the handiest tool for separating magnetic impurities from non-ferrous scrap, plastic, glass, or any other material. (kumarmagnetind.com)
  • INCOR 16 is a permanent-magnet material. (asminternational.org)
  • Because this material is extremely hard and brittle, however, fabricating complex shapes with conventional technology presents huge challenges. (nanowerk.com)
  • The Neodymium Iron Boron material is very hard and brittle, so machining is difficult at best. (smagnetic.com)
  • Like other material, ceramic magnets also have a variety of grades, including Ceramic 1, Ceramic 5, Ceramic 8, Y10, Y30 and Y30BH in strengths ranging from 1.05 - 3.8 MGOe. (sourcemagnets.com)
  • China Magnets Source Material Ltd is a professional ferrite/ceramic magnet manufacturer over 20 years. (sourcemagnets.com)
  • Ferrite magnetic material proposes a high level of endurance, being a top choice for long term performance. (modernmagnets.co.za)
  • NdFeB magnets are the highest energy product of any material available today, in a wide variety and range of sizes, shapes and grades, this including Grain Boundary Diffusion (GBD) Neo magnets. (magnetika.com.mx)
  • 2. Hardness refers to the ability of a material to locally resist hard objects pressed into its surface. (meank-magnet.com)
  • Sintered NdFeB is a brittle material, and its mechanical properties are hard and brittle, which has high strength, low toughness. (meank-magnet.com)
  • The sintered NdFeB permanent magnet material exhibits high strength and low toughness characteristics due to its own crystal structure. (meank-magnet.com)
  • Magnet beginner set: 14 pieces magnets and accessories for scientific experiments, 1 x compassplastic material 3 x magnetic car, 2 x bar magnet, 1 x u-shape magnet, 1 x ring ceramic magnet, 1 x iron filings box. (ontogoxer.com)
  • The Permanent ferrite magnet is made of SrO or BaO and Fe 2 O 3 by ceramic processing technology.The texture is relatively hard, brittle material.According to the different orientation of the crystal , it can be divided into isotropic magnets and anisotropic magnets. (spnerkeji.com)
  • The basic factors that go into determining a pickup's sound are the kind of pole pieces used, the material the magnet is made out of, how many coils there are, the number of wrappings on the pickup, and whether it is active or passive. (buzzharmony.com)
  • For example, if you stacked two of our 1/8' thick D82 disc magnets to form a 1/4' thick stack, the two magnets would have about the same magnetic strength as the 1/4' thick D84 discs . (kjmagnetics.com)
  • Don't let them fall on to hard surfaces (such as concrete) as they can easily shatter into very sharp pieces. (vigetx.com)
  • The second category of permanent magnets is ferrite permanent magnet materials. (stanfordmagnets.com)
  • Ferrite permanent magnet materials can be divided into sintered ferrite, bonded ferrite, and injection ferrite according to their different production processes. (stanfordmagnets.com)
  • Sintered NdFeB has the highest magnetic energy product (BH)m, and its fracture toughness is still comparable to Sm2Tm17, SmCo5, and ferrite permanent magnets, because they are all permanent magnet materials based on intermetallic compounds which are brittle materials. (meank-magnet.com)
  • Ferrites are, like most other ceramics, hard and brittle. (chinamagnets.com)
  • While Ferrites are also called Ceramic magnets - they both refer to the exact same magnet, the term ceramic came into effect because these magnets are electrically insulating (electrical current does not pass through them because of their exceptionally high electrical resistance). (modernmagnets.co.za)
  • A by-product of low coercivity is sensitivity to demagnetizing effects due to external magnetic fields, shock, and application temperatures. (dextermag.com)
  • Sintered Neodymium Magnet is one of the high performance rare earth permanent magnets , which use neodymium (Nd), iron (Fe), and boron (B) as their main ingredients and is susceptible to demagnetization when exposed to elevated temperatures. (cndailymag.com)
  • There are many grades which can stand high temperatures, but several factors will dictate the performance of the Neodymium magnet . (cndailymag.com)
  • Some permanent magnets are brittle and may break at high temperatures. (stanfordmagnets.com)
  • SmCo magnets can operate at higher temperatures up to 300°C and are widely used in applications in which higher operating temperature and higher corrosion and oxidation resistance are crucial. (sonnecy-shop.com)
  • Precisely cut, straight edges, fine 90° corners, medium strength magnets , Ferrite magnets can be used at temperatures up to a maximum of +250°C allowing for a range of high temperature uses. (modernmagnets.co.za)
  • It is getting to replace the traditional magnets of hard ferrite, AlNiCo and SmCo in many fields such as electro-acoustic devices, electric motors, sensors/transducers, instruments and meters, auto industry, petro-chemical industry and magnetic health-care products etc. (sonnecy-shop.com)
  • If used independent of other circuit components, as in security applications, the effective length to diameter ratio (related to the permeance coefficient) must be great enough to cause the magnet to work above the knee in its second quadrant demagnetization curve. (dextermag.com)
  • An optimized circuit design results in a circuit permeance coefficient that causes the magnet to operate above the knee of its demagnetization curve by a margin large enough to offset anticipated operating demagnetizing effects. (dextermag.com)
  • Because of very high (BH)max and Hci, neodymium magnets could be used as a reversible medium for large amount of energy transformation in miniaturized application where a strong magnetic demagnetization field exists , such as computer hard drive. (china-empire.com)
  • The high coercivity means, their materials are highly resistant to demagnetization, an essential characteristic in a permanent magnet. (modernmagnets.co.za)
  • Unlike most high coercivity magnetic materials which are hard and brittle and need to be cast into shape, cunife can be drawn into thin wires. (wikipedia.org)
  • These Permanent magnet lifters are able to solve handling needs of ferrous materials at an exceptionally low cost, without using electricity, without any installation or maintenance cost whatsoever. (magnet4less.com)
  • Essen Magnetics offers a range of magnetic materials for permanent magnets. (essenmagnetics.com)
  • There are also other common materials like SmCo, AlNiCo and Ferrite Magnets listed. (abcxsaa.com)
  • Magnetic Grill used to filter out or separate iron particles mixed with dry, granular or free-flowing materials. (kumarmagnetind.com)
  • 4. What materials do magnets attract? (smagnetic.com)
  • Ferromagnetic materials are strongly attracted by a magnetic force. (smagnetic.com)
  • 5. What materials can I use to block/shield magnetic fields? (smagnetic.com)
  • The fracture toughness of bonded rare earth permanent magnet materials, Fe-Cr-Co, and magnetic steel is the best, but their magnetic energy product (BH) m is much lower than that of sintered NdFeB. (meank-magnet.com)
  • Using tubes made of different metal materials as well as one made of plastic, in combination with a rare earth magnet (neodymium magnet) the teacher will demonstrate how electrons will flow freely through a metal and create a magnetic field. (vigetx.com)
  • The process and the heat treatment needed to optimize magnetic properties produces hard (Rc45) and brittle parts that are best shaped or finished by abrasive grinding. (dextermag.com)
  • The magnetic properties of NdFeB magnets are incredible, please be careful not to hurt your hands when using them. (magnetsmagnets.store)
  • 4. Some Neodymium magnets will lose their magnetic properties if heated above 175°F (80°C). (smagnetic.com)
  • The application of sintered NdFeB permanent magnet is mainly to use its magnetic properties. (meank-magnet.com)
  • But due to the different use environment and conditions, except the requirements for magnetic properties, there are also requirements for mechanical properties and chemical properties. (meank-magnet.com)
  • It may peel off, fall off the edge, fall off the corner or crack, etc., so it is natural to have requirements on the mechanical properties of the magnet. (meank-magnet.com)
  • 5. The larger and thicker the magnet, the stronger the magnetic force. (shopmakura.com)
  • 3. The bigger and thicker the magnet is, the stronger the magnetic force is. (mytoppicked.com)
  • This ferrite block magnet has a 50mm length, a 19mm width and a height of 4.9mm. (amfmagnets.com)
  • Ferrite Block Magnet 150X100X25mm - These magnets need no protection against surface rust as they conditioned to work in both indoor and outdoor environments. (modernmagnets.co.za)
  • Ferrite Block Magnet 150X100X25mm - Our largest ceramic block magnet. (modernmagnets.co.za)
  • 1. The greater the magnetic flux density (magnetic induction) B of the magnet, the stronger the thrust acting on the sound film. (stanfordmagnets.com)
  • 2. The greater the magnetic flux density (magnetic induction) B, the higher the relative power and the higher the sensitivity of the speaker. (stanfordmagnets.com)
  • High performance of the products and the surface magnetic flux density can reach from 1200 GS to 2100GS. (spnerkeji.com)
  • The force required to detach a magnet from a work load surface when the force is applied normally to the work load surface and through the center of force of the magnet. (magnet4less.com)
  • 6. It is normal to have small defect marks on the surface of the magnet, which will not affect the normal use of the magnet. (shopmakura.com)
  • 4.Please keep away the magnet from high temperature and corrosive environment , although there is a coating on the surface of the magnet. (mytoppicked.com)
  • Completed magnets have a rough surface and only approximate dimensions. (magnosphere.com)
  • Therefore, Neodymium magnets have strong holding strength on metal surface and could be used as component for holding, separating, etc. (china-empire.com)
  • Measured in kilograms, the pull force indicates how much weight the magnet can hold when adhered against 10mm thick mild steel with flat and direct surface-to-surface contact. (amfmagnets.com)
  • The Pull Force listed for each magnet is based on lifting 10mm thick steel from a horizontal surface. (amfmagnets.com)
  • Magnets on a vertical surface (of 10mm thick steel) are generally able to hold around only 30% of the pull force listed in the product description. (amfmagnets.com)
  • This is due to the effects of gravity and the lack of friction between the surface and the shiny magnet. (amfmagnets.com)
  • Chips of up to 5% of the magnets surface is acceptable and cracks are allowed provided less than 50% of the magnets surface is affected. (modernmagnets.co.za)
  • SmCo magnets are very anti-corrosive and generally do not require an electroplated surface treatment. (magnetika.com.mx)
  • If you take one of our block magnets and place it on a flat surface with the thickness dimension as the vertical dimension, the poles will be on the top and bottom of the magnet as it sits. (kjmagnetics.com)
  • These magnets are extremely strong for their small size, metallic in appearance and found in simple shapes such as rings, blocks and discs. (cndailymag.com)
  • The neodymium magnets are extremely strong, and must be handled with care to avoid personal injury and damage to the magnets. (smagnetic.com)
  • Ferrite Magnets are extremely popular in motor, generator, loudspeaker and marine designs but are found in almost all industries. (modernmagnets.co.za)
  • For example, some permanent magnets are used in high-speed rotating machinery, they have to withstand large centrifugal force, or are used in a vibration environment, or are subjected to extremely high acceleration (3g~5g), or when they are installed, they are subjected to stress. (meank-magnet.com)
  • Smaller ferrite block magnets are commonly used in DC motors, as sensors and in various hand crafts. (amfmagnets.com)
  • There are a wide variety of magnetic sensors - ranging from simple switch devices to high accuracy, long length magnetostrictive sensors. (controlengeurope.com)
  • 5. Healthcare: medical equipment, magnetic health products and so on. (shopmakura.com)
  • Ideal applications for our printable, flexible-magnet products include signage and displays for advertising and commercial printing. (magnosphere.com)
  • As a leading magnet supplier across the world, Stanford Magnets has been involved in R&D, manufacturing, and sales of permanent magnets since the 1990s and provide customers with high-quality rare earth permanent magnetic products such as neodymium magnets, and other non-rare earth permanent magnets. (stanfordmagnets.com)
  • Our range of magnetic products designed following industry norms and available in varied shapes, sizes and other configurations. (kumarmagnetind.com)
  • Whether you're looking for a Permanent Magnets Drum Separator or an Over Band Magnetic Separator , you can find in our broad range of products without any difficulty. (kumarmagnetind.com)
  • Incor 16 can be used to lower size and weight in a wide range of other products where permanent magnets are used. (asminternational.org)
  • Producer or source: Indiana General Magnet Products. (asminternational.org)
  • Have you ever wondered if the low-end products need to use high volume magnets, how can this be solved? (sourcemagnets.com)
  • Both magnets are permanent magnet used on industrial and household products. (sourcemagnets.com)
  • Permanent Ferrite Magnet sintered process, specification , OD50*d30*h20 , The products widely used in refrigerator compressor motor. (spnerkeji.com)
  • The adhesive force of our magnets is determined at room temperature on a polished plate made of steel S235JR (ST37) with a thickness of 10 mm by the vertical withdrawal of the magnet (1kg ~ 10 N). A different value down to -10% compared to the specified value is possible in exceptional cases. (magnet-shop.com)
  • Rubberized magnet system Ø 31 mm made of NdFeB with a holder for cable ties. (magnet-shop.com)
  • These can be made to order in magnets for sale . (abcxsaa.com)
  • Made with high coercivity permanent magnets sealed in non-magnetic tubes, these magnets do not require any cumbersome attachment or alteration to fix it in the hopper. (kumarmagnetind.com)
  • Magnetic drives and couplings can be made smaller and operated at higher torque levels. (asminternational.org)
  • Ferrite Magnets are man-made magnets. (modernmagnets.co.za)
  • It also consists of a magnetic rod with modern anisotropic permanent magnets. (kumarmagnetind.com)
  • ① With dry process can produce isotropic & anisotropic magnets, the tool can be changed and developed easily. (spnerkeji.com)
  • ② With wet process only can produce anisotropic magnets,it is complicated to change the tool and the tooling charge is high. (spnerkeji.com)
  • ④ Anisotropic ferrite magnets are all oriented in the manufacturing direction, and can be magnetized in the direction of orientation. (spnerkeji.com)
  • Depending on how much time you have or how deep into the topic you want to go you can demonstrate what happens to the magnet in different pipes (copper, aluminum, steel (iron), etc.) and do comparisons, recording time, and/or discuss the atomic structures of the metals. (vigetx.com)
  • When an alternating current passes through the coil of the speaker, a corresponding magnetic field is generated in the coil. (stanfordmagnets.com)
  • They also exhibit no external magnetic field. (magnosphere.com)
  • Magnets with a stronger field can disrupt and alter the magnetic field. (abcxsaa.com)
  • Design and Operation of Brushed and Brushless DC Motors Brushed DC Motor A DC Brushed Motor is comprised of four fundamental components: an armature (which holds wire motor windings, and magnets), a ring of magnets (or field magnet), carbon brushes, and a commutator. (fuelab.com)
  • The ring of magnets and the brushes are non-moving, while the armature and commutator rotate together on the motor shaft within the field magnet. (fuelab.com)
  • The field magnet rotates and is directly connected to the motor output shaft to provide propulsion. (fuelab.com)
  • Outrunner - The field magnet is a drum rotor which rotates around the stator. (fuelab.com)
  • Inrunner - The stator is a fixed drum in which the field magnet rotates. (fuelab.com)
  • With a brushless motor a small circuit board coordinates the energy delivery to the windings to charge them inversely in polarity to the field magnet. (fuelab.com)
  • The maximum magnetic field B is about 0.35 T and the magnetic field strength H is about 30 to 160 kiloampere turns per meter (400 to 2000 oersteds). (sourcemagnets.com)
  • Understand a magnetic field. (vigetx.com)
  • Realize that an electric current can be induced by a magnetic field. (vigetx.com)
  • It has a good video showing how the magnetic field slows the movement of the magnet as well. (vigetx.com)
  • AOMAG #ad - Physical enlightenment toolthis magnet kit for kids allows children to make simple home experiments, and blue and red attract each other, or under the guidance of their parents, learn the mystery of magnetic field. (ontogoxer.com)
  • See the magnetic field?It can enlighten children's physical thinking. (ontogoxer.com)
  • There is also the issue of batch-to-batch variability - since the field generated by one magnet is never the same as that of a second due to small differences in composition. (controlengeurope.com)
  • One, particularly nasty failure mode is the gradual build up of magnetic particulates at the magnet (e.g. ferrous swarf, dust or particulates in engine oil), which effectively destroys measurement performance by distorting the magnetic field. (controlengeurope.com)
  • Magnets are cast or sintered as closely as possible to required size so that abrasive grinding to finish dimensions and tolerances are minimized. (essenmagnetics.com)
  • 2. Different batches of magnets have different tolerances. (shopmakura.com)
  • Brushed DC Motors typically use ceramic (Ferrite) magnets, which are composed of strontium carbonate and iron oxide. (fuelab.com)
  • Brushless DC Motors are "hard wired' to the power source. (fuelab.com)
  • Due to cost effective, Ferrite magnets have a very wide range of applications, from motors and loudspeakers to toys and crafts. (sourcemagnets.com)
  • These magnets can be used in a variety of applications including magnetic separation devices, high performance motors (EV motors and wind turbines), sensor, speakers, magnetic resonance imaging and more. (magnetika.com.mx)