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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 kinds of carbonated and silicate-containing compounds were doped, and carbonated silicon-substituted hydroxyapatite (CSi-HA) nanopowders were prepared by ultrasonic co-precipitation method. The synthesis conditions were optimized and characterized The product of the crystal phase, particle size, structure and surface morphology. The results showed that when Ca (OH) 2 was adjusted to 10.5-11.5 with ammonia, the solution of H3PO4 was added under the continuous action of ultrasonic wave to prevent the formation of secondary phase and to produce a highly pure and highly dispersed primary ecosystem HA colloidal solution; the doped silicon source Na2SiO3 and carbon source Na2CO3 mixed solution and then added to the initial state of HA colloidal solution under ultrasonic continuous action, can effectively achieve CO32- and SiO4-to HA structural group replacement, and get CSi-HA nano-powder with high purity, fine crystal and narrow and uniform particle size distribution. In the doping range, the grain size of CSi-HAP decreases with the increase of the content of carbonate and silicate.