摘要
掺杂2种含有碳酸根和硅酸根的化合物,采用超声共聚沉淀法制备碳酸化含硅羟基磷灰石(carbonated silicon-substituted hydroxyapatite,CSi-HA)纳米粉体,优化组合合成条件,并分析表征产物的晶相、粒度、结构和表面形貌。结果表明:将钙源Ca(OH)2用氨水调节pH=10.5～11.5后,在超声波连续作用下加入磷源H3PO4溶液,能够有效防止形成次生相,可以生成纯度高、高度分散的初生态HA胶状液;将掺杂硅源Na2SiO3和碳源Na2CO3混合溶液再在超声波连续作用下加入初生态HA胶状液中,能够有效实现CO32-和SiO4-对HA结构基团的置换,并得到纯度较高、结晶细腻、粒径分布范围窄且均匀的CSi-HA纳米粉体;在掺杂范围内,随碳酸根和硅酸根掺量的增加,CSi-HAP晶粒尺寸呈减小趋势。
Two compounds containing CO 3 2– and SiO 4 4– groups were adulterated and sonochemistry coprecipitation method was applied to fabricate carbonated silicon-substituted hydroxyapatite （CSi-HA） nanopowder. The synthetic process was optimized and crystalline phases, grain dimension, and morphology of CSi-HA nanopowder were represented. Results demonstrate that H 3 PO 4 addition into alkaline Ca（OH）2 liquid （keeping pH=10.5-11.5 with ammonia） with continuous ultrasound application can obviously prevent secondary phase formation and can make pure, highly dispersed and gel-like nascent HA product. Introduction of Na2SiO3 and Na2CO3 mixed solution as doping source into the nascent HA product with concurrent use of continuous ultrasound can effectively result in group substitution of HA by CO32 and SiO44 and can be used to fabricate pure, fine-crystalline and uniformly distributed CSi-HA nanopowder. It is also found that the CSi-HA grain size shows a decreasing trend with the increase of CO32- and SiO44 substi- tution in the experimental range.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2011年第12期1915-1921,共7页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(51072109)
陕西省教育厅科技专项(11JK-0835)资助项目
关键词
碳酸化:含硅羟基磷灰石
超声共聚沉淀法:结构表征
carbonated
silicon-substituted hydroxyapatite
sonochemistry coprecipitation
configuration representation
