Ceramics in the K2O-CaO-SO3-P2O5 System

Ceramics in the K2O-CaO-SO3-P2O5 system has been prepared from powder mixtures of potassium hydrogen sulfate KHSO4 and calcium hydroxyapatite Ca-10(PO4)(6)(OH)(2) at molar ratios KHSO4/Ca-10(PO4)(6)(OH)(2) = 2/1, 4/1, and 6/1. The powder mixtures were obtained in acetone under mechanical activation conditions using a planetary mill. After homogenization, the phase composition of powder mixtures included monetite CaHPO4, singenite K2Ca(SO4)(2).H2O, and calcium hydroxyapatite Ca-10(PO4)(6)(OH)(2). After firing at 700-900 degrees C the phase composition of ceramics manufactured from the powder mixtures included phases of potassium-substituted tricalcium phosphate Ca10K(PO4)(7) and calciolangbeinite K2Ca2(SO4)(3), as well as potassium sulfate K2SO4 at molar ratios KHSO4/Ca-10(PO4)(6)(OH)(2) = 4/1 and 6/1. Ceramic materials whose phase composition includes calciolangbeinite K2Ca2(SO4)(3) and potassium-substituted tricalcium phosphate Ca10K(PO4)(7) can be used as resorbable porous material for curing defects of bone tissue by regenerative medicine methods or as a matrix on designing luminescent/thermoluminescent materials. Ceramic materials in K2O-CaO-SO3-P2O5 system have been obtained for the first time, therefore, additional studies are necessary to determine the optimal phase ratio for the noted applications.