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 Ca₁₀(PO₄)₆(OH)₂ at molar ratios KHSO₄/Ca₁₀(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 Сa₁₀(PO₄)₆(OH)₂. After firing at 700–900°C the phase composition of ceramics manufactured from the powder mixtures included phases of potassium-substituted tricalcium phosphate Сa₁₀K(PO₄)₇ and calciolangbeinite K₂Ca₂(SO₄)₃, as well as potassium sulfate K₂SO₄ at molar ratios KHSO₄/Ca₁₀(PO₄)₆(OH)₂ = 4/1 and 6/1. Ceramic materials whose phase composition includes calciolangbeinite K₂Ca₂(SO₄)₃ and potassium-substituted tricalcium phosphate Сa₁₀K(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. [ABSTRACT FROM AUTHOR]