中文摘要：

采用超声共聚法制备了含硅羟基磷灰石Si－HA纳米粉体，并用柠檬酸与丙烯酸制成的固化液与之按一定比例调制成含硅羟基磷灰石骨水泥Si-HAC。采用XRD和FESEM对Si－HA纳米粉体的晶相、粒度、结构和表面形貌进行了分析表征，并用万能材料试验机测定了所得Si－HAC骨水泥的力学性能。研究结果表明，将硅源TEOS加入到具有较强碱性的Ca（OH）2氨水前驱液中能有效避免TEOS的水解漂浮，使钙硅均匀混合；将超声空化作用施加于Ca（0H）2和H3P04外加硅源的反应体系，进行超声共聚，能有效防止次生相的形成，合成的纳米粉体纯度高，结晶细腻而均匀；将硅掺杂的Si-HA纳米粉体与柠檬酸／丙烯酸固化液调制成Si-HAC骨水泥能有效提高其力学性能，尤以4％Si最佳。

英文摘要：

Silicon-substituted hydroxyapatite（Si-HA） nanopowder is fabricated through co-deposit method with ultrasonic application, and citric acid/acrylic acid is used to prepare solidifation liquid. The nanopowder and the liquid are adjusted to form Si-HAC bio-cement according to a definate ratio. The crystalline phase, grain demension and morphology of the Si-HA nanopowder are represented and observed by XRD and FESEM. The Si-HAC is also exa- mined for mechanical performance. The obtained resultes demonstrate that the TEOS addition into alkaline Ca（OH）2 and ammonia liquid can obviously elimit its hydrolysis and make the silicon and calcium source uniformly mixing. The application of ultrasonic co-deposition to the reaction system of Ca（OH）2, H3PO4 and silicon source can effectively prevent secondary phase formation and make the product nanopowder fine and uniform. The citric acid/acrylic acid ad- justed Si-HAC bio-cement shows an increase of mechanical strength with the increase of silicon suhstution, the most favorite around 4%Si addition.