摘要
以湿化学法制备了碳氟共替代羟基磷灰石(CFHA)。通过X射线衍射(XRD)、高温膨胀仪、扫描电镜(SEM)和电子万能试验机研究了氟和碳酸根共替代对CFHA高温热稳定性、高温烧结性能、热膨胀系数和抗折强度的影响。结果表明,湿CO2保护气氛有利于碳酸根的热稳定性,失重主要取决于碳酸根含量,碳氟替代对碳酸根的分解温度无明显影响。碳酸根替代促进烧结,而氟替代不利于烧结。碳酸根和氟的共替代能够降低CFHA的高温热膨胀系数(CET)和提高抗折强度。
Carbonate and fluoride co-substituted hydroxyapatite powders(CFHA)are prepared via wet chemical precipitation method.XRD,high-temperature dilatometer,SEM and the universal testing machine were used to investigate the influences of carbonate and fluoride co-substitution on the high-temperature thermal stability,high-temperature sintering properties,coefficient of thermal expansion(CET)and flexural strength of CFHA compacts.The results show that the wet CO2 atmosphere is beneficial to the thermal stability of carbonate.The weight loss mainly depends on the carbonate content,and the carbonate and fluorine substitutions have no obvious effect on the decomposition temperature of the carbonate.Carbonate substitution promotes sintering,whereas fluorine substitution is not good for sintering.The CET of CFHA samples deceases with the carbonate and fluoride substitution content,while flexural strength increases.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2018年第2期2130-2135,共6页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51462014)
江西省教育厅科研资助项目(GJJ160868)
关键词
碳氟共替代
热稳定性
热膨胀性
抗折强度
carbonate and fluoride co-substitution
thermal stability
thermal expansion
flexural strength
