Powders of hydroxyapatite (HA) Ca10(PO4)6(OH)2 treated in 0.25M aqueous solutions of ammonium NH4H2PO4, sodium NaH2PO4 and potassium KH2PO4 dihydrophosphates for 1 hour under stirring were used for ceramics production.
According to the XRD data, there was no changes in the phase composition of the powders after such treatment. After
firing in the range of 900 – 1100 ?С, the phase composition of ceramics based on HA Ca10(PO4)6(OH)2 powder treated with an aqueous solution of NH4H2PO4 included ?-tricalcium phosphate ?-Ca3(PO4)2 and HA Ca10(PO4)6(OH)2; The phase composition of ceramics based on HA Ca10(PO4)6(OH)2 powder treated with NaH2PO4 aqueous solution included sodium-substituted tricalcium phosphate Ca10Na(PO4)7 and HA Ca10(PO4)6(OH)2; the phase composition of ceramics based on HA Ca10(PO4)6(OH)2 powder treated with an aqueous solution of KH2PO4 included potassium-substituted tricalcium phosphate Ca10K(PO4)7 and HA Ca10(PO4)6(OH)2. The formation of biphasic ceramics occurred due to a decrease in the molar ratio Ca/P of HA powder after treatment in aqueous solutions of ammonium NH4H2PO4, sodium NaH2PO4 and potassium KH2PO4 dihydrophosphates. HA-particle surface adsorption of cations and anions from the solution, slight dissolution of HA in solutions of dihydrophosphates with acidic pH, as well as ion exchange of cations and anions of HA for cations and anions from solutions, were possible processes providing change in the ratio of cations and anions in the HA powder. The resulting ceramic composites contain biocompatible phases, and can be recommended for the creation of bone implants.
Tatiana V. Safronova – PhD (Engineering), senior researcher, Department of Chemistry, Materials Science Department, Lomonosov Moscow State University, Moscow, Russia.E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Zhi Yuan Zhao – student, Materials Science Department, Lomonosov Moscow State University, Moscow, Russia.E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Jingwei ЩЩЩ Li – student, Materials Science Department, Lomonosov Moscow State University, Moscow, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Maksim R. Kaimonov – PhD student, Materials Science Department, Lomonosov Moscow State University, Moscow, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Tatiana B. Shatalova – PhD (Chemistry), associate professor, Department of Chemistry, Materials Science Department, Lomonosov Moscow State University, Moscow, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Yaroslav Yu. Filippov – PhD (Chemistry), senior researcher, Research Institute of Mechanics, Materials Science Department, Lomonosov Moscow State University, Moscow, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Tatiana V. Filippova – engineer, Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Tatiana V. Gavlina – PhD (Chemistry), senior researcher, Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Vyacheslav S. Vlasenko – researcher, Department of Physics, Lomonosov Moscow State University, Moscow, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
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