• decomposition
  • 7. A process as claimed in claim 1, wherein the decomposition of the apatite is small and a substantially pure apatite layer is obtained without decomposition products being present. (google.com)
  • An object of the present invention is to provide a process for producing a composite article, and a composite article having an apatite layer which contains no decomposition product formed during the coating process, and wherein the apatite layer has excellent adhesive properties to the substrate comprised of metals, high-strength ceramics, etc. (google.com)
  • nuclear waste
  • Topics covered include crystallization mechanisms of the various families of apatite GCs and an update on research and development on apatite GCs for applications in orthopedics, dentistry, optoelectronics, and nuclear waste management. (frontiersin.org)
  • Due to the ease of solid solution of the apatite lattice, rare earth doped apatite GCs are discussed for potential applications in optoelectronics and nuclear waste management. (frontiersin.org)
  • substrate
  • An apatite coated article comprising a substrate having thereon an apatite layer which is formed by flame spraying apatite powder at from about 2,000 to 4,000 C., and a process for producing such an apatite coated article. (google.com)
  • 1. A process for producing an apatite coated article comprising a substrate having thereon an apatite layer, said process comprising flame spraying apatite powder at from about 2,000 to 4,000 C. onto said substrate, wherein said flame spraying is high-speed flame spraying using a gas jet wherein the gas jet speed has a Mach number of 2 or more. (google.com)
  • In a second step the coated substrate can be converted to a less reactive coating by being immersed into a basic or neutral solution to convert the coating into an apatite. (google.com)
  • 11. A method in accordance with claim 9 , further including a subsequent step of immersing the coated substrate into a basic or neutral solution to convert the said coating into an apatite. (google.com)
  • wherein
  • 2. A process as claimed in claim 1 wherein said apatite powder has an average particle diameter of from 10 to 30 μm. (google.com)
  • sedimentary
  • Fission tracks in apatite are commonly used to determine the thermal history of orogenic (mountain) belts and of sediments in sedimentary basins. (wikipedia.org)
  • chemistry
  • Apatite chemistry has recently given new insight into a wide range of geological processes and tools, such as magmatism, metasomatism, planetary geochemistry, and geochronology. (eurekalert.org)
  • In their open-access Geology article, Emilie Bruand and colleagues expand the utility of apatite by presenting a novel way to fingerprint magma chemistry and petrogenesis using apatite inclusions within robust titanite and zircon. (eurekalert.org)
  • lattice
  • Experimental studies in the Cao - P 2 O 5 - H 2 O - CO 2 system at high temperature and elevated CO 2 pressures have led to suggestions of two possible lattice sites for carbonate substitution in the Ca-apatites [Ca 5 (PO 4 ) 3 (OH)], the (F,OH) site and for (PO 4 ). (springer.com)
  • The a-lattice constant that is associated with the carbonate content in carbonate apatite decreases with age in a systematic way, whereas the c-lattice constant does not change significantly. (hindawi.com)
  • pose
  • This is preferable to traditional rare-earth ores, as apatite is non-radioactive and does not pose an environmental hazard in mine tailings. (wikipedia.org)
  • enamel
  • Acid (H+), produced especially after a high-sugar meal, attacks the apatite: Ca5(PO4)3OH(s) + H+(aq) → Ca5(PO4)3+(aq) + H2O(ℓ) The degradation of apatite by loss of OH− causes the enamel to dissolve. (wikipedia.org)
  • crystal
  • Studies of the average crystal structure properties of human dental apatite as a function of age in the range of 5-87 years are reported. (hindawi.com)
  • Intra-articular apatite crystal deposition. (bmj.com)
  • green
  • Chatoyant stones are known as cat's-eye apatite, transparent green stones are known as asparagus stone, and blue stones have been called moroxite. (wikipedia.org)
  • forms
  • Fluoro-chloro apatite forms the basis of the now obsolete Halophosphor fluorescent tube phosphor system. (wikipedia.org)