摘要
目的:研究纳米缺钙磷灰石的热处理特性。方法:湿法合成纳米缺钙磷灰石经不同温度热处理后,采用傅立叶红外(FTIR)、X-射线衍射(XRD)和场发射扫描电镜(FESEM)等方法分别对粉体进行化学组成、相结构与表面形貌的分析与观察。结果:500℃以下热处理2h后晶粒尺寸基本不变,直径为12—26nm,长度为30—66nm;600℃热处理2h后晶粒尺寸增大,直径为25—40nm左右,长度为75—100nm;800℃热处理2h后发生分解,主要产物为磷酸三钙,其晶粒的直径、长度均大于200nm;300℃热处理2h后可除去NH4^+。结论:纳米缺钙磷灰石具有自身的热处理特性。
Objective: To study the sintefing character of calcium-deficient apatite. Methods: Calcium-deficient apatite synthesised by wet chemical method was sintered at different temperature and then its chemical composition, phase structure and morphology were examined by FT-IR spectroscopy, X-ray diffraction (XRD) and field emission scanning microscopy (FESEM) respectively. Results:When the heating temperature is below 500 ℃, apatite crystal kept a stable size with a diameter of 12 -26 nm and a length of 30 -66 nm. After sintered at 600 ℃ for 2 h, apatite crystal were with a diameter of 25 -40 nm and a length of 75 - 100 nm. Around 800℃ for 2 h, apatite was decomposed into Ca3 ( PO4 )2. The crystal size of the Ca3 ( PO4 )2 surpassed 200 nm in diameter and length. NH4^+ ion could be removed at temperature beyond 300 ℃. Conclusion: Calcium-deficient apatite has it's specific sintering character.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2006年第2期191-194,共4页
Journal of Practical Stomatology
基金
西安市工业科技攻关计划项目(GG200356)
第四军医大学后备人才基金资助
关键词
缺钙磷灰石
热处理
形貌
纳米材料
Calcium-deficient apatite
Heat treatment
Morphology
Nano-structutred materials