CERAMIC MATERIALS OF A GIVEN PHASE COMPOSITION BASED ON HYDROXYAPATITE POWDER TREATED IN SOLUTIONS OF AMMONIUM, SODIUM AND POTASSIUM DIHYDROPHOSPHATES

Steklo i Keramika Pub Date : 2023-06-01 DOI:10.14489/glc.2023.06.pp.041-053

T. V. Safronova, Z. Zhao, J. Li, M. Kaimonov, T. Shatalova, Y. Filippov, T. V. Filippova, O. T. Gavlina, V. S. Vlasenko, A. V. Knotko

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Abstract

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.

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在二氢磷酸铵、钠和钾溶液中处理过的羟基磷灰石粉末的特定相组成的陶瓷材料

将羟基磷灰石（HA）Ca10(PO4)6(OH)2 粉末在 0.25M 的 NH4H2PO4 铵、NaH2PO4 钠和 KH2PO4 钾二氢磷酸盐水溶液中搅拌处理 1 小时后，用于陶瓷生产。根据 XRD 数据，经过这种处理后，粉末的相组成没有发生变化。用 NH4H2PO4 水溶液处理 HA Ca10(PO4)6(OH)2 粉末后，在 900 - 1100 °C的范围内焙烧，陶瓷的相组成包括磷酸三钙、磷酸二氢钙和磷酸钙钙。-用 NaH2PO4 水溶液处理基于 HA Ca10(PO4)6(OH)2 粉末的陶瓷的相组成包括钠取代磷酸三钙 Ca10Na(PO4)7 和 HA Ca10(PO4)6(OH)2；用 KH2PO4 水溶液处理的基于 HA Ca10(PO4)6(OH)2 粉末的陶瓷的相组成包括钾代磷酸三钙 Ca10K(PO4)7 和 HA Ca10(PO4)6(OH)2。在 NH4H2PO4 铵、NaH2PO4 钠和 KH2PO4 二氢磷酸钾水溶液中处理后，由于 HA 粉末的 Ca/P 摩尔比降低，形成了双相陶瓷。HA 颗粒表面对溶液中阳离子和阴离子的吸附、HA 在酸性 pH 值的二氢磷酸盐溶液中的轻微溶解，以及 HA 的阳离子和阴离子与溶液中阳离子和阴离子的离子交换，都是改变 HA 粉末中阳离子和阴离子比例的可能过程。由此产生的陶瓷复合材料含有生物相容性相，可推荐用于制作骨植入物。

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Steklo i Keramika

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