灌木岩
煅烧
结晶度
降水
钙
磷酸盐
傅里叶变换红外光谱
分解
化学
柠檬酸
化学工程
相(物质)
无机化学
核化学
材料科学
催化作用
有机化学
工程类
气象学
物理
结晶学
作者
José Guilherme Neves,Daniel Navarro da Rocha,Camila Cristine Lopes,Marcelo Henrique Prado da Silva,Mac Sinhoreti,L. Correr‐Sobrinho,Marco A. Fraga,A.B. Correr
出处
期刊:Cerâmica
[SciELO]
日期:2021-06-01
卷期号:67 (382): 236-243
被引量:6
标识
DOI:10.1590/0366-69132021673822965
摘要
Multiphasic calcium phosphate powders were synthesized by the acidic route, using lactic acid as a chelating agent that allows the production of a stable and rich solution of calcium and phosphate ions at room temperature. After pH adjusting, without varying the concentrations of precursor solution, XRD and FTIR analyses showed different CaP phases before and after heat treatment at 1000 °C. At pH 5, brushite plate-like particles were produced, while at higher pH levels (7 to 12) nano-hydroxyapatite particles were formed. After the calcination process, partial and total decomposition of hydroxyapatite in the β-TCP phase was explained by XRF analysis due to the calcium-deficient hydroxyapatite of synthesized samples at pH 7 and 10. This work presents an important method to synthesize any desired CaP phase compositions by varying the pH level and subsequently performing heat treatment, which has a direct effect on morphology, crystallinity, and formation of different CaP powders.
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