Multiphase ceramics were obtained from calcium phosphate powders synthesized using mechanical activation from sodium pyrophosphate and soluble calcium salts (acetate, nitrate, chloride). Powders after synthesis from sodium pyrophosphate and calcium acetate or calcium nitrate were a mixture of double calcium-sodium phosphate, unreacted calcium salt and a by-product of the reaction (NaNO 3 or NaCH 3 COO) ... The powders after synthesis from sodium pyrophosphate and calcium chloride were a mixture of amorphous calcium phosphate and a by-product NaCl. The phase composition of the samples after heat treatment depended on the firing temperature and the composition of the initial powders. Ca 2 P 2 O 7 , Na 2 CaP 2 < / sub> O 7 , NaCaPO 4 , Ca 3 (PO 4 ) 2 .
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