Abstract
The phase transition of Ca-deficient hydroxyapatite (CDHA) with citric acid (Cit) coordination was investigated. Cit promoted the substitution of K+ ions into CDHA to generate the HA phase. The K+-doping increased the phase transition temperature of CDHA, providing the transition to β- and α-tricalcium phosphates at higher temperatures. These results suggest controllable phase transition via Cit addition.
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