摘要
通过沉淀法制备超细羟基磷灰石(HA)粉体,以该前驱体和硅灰石为主要原料,采用常压烧结制备多孔陶瓷。研究表明,在pH值为9.5,反应温度为95℃,以聚乙二醇为分散剂的情况下,采用沉淀法可以有效获得分散性良好的超细单一相HA粉体。预煅烧过程可以改善HA的结晶程度,但是对陶瓷的力学性能影响不大。采用硅灰石增韧可以改善羟基磷灰石多孔陶瓷的力学性能,该复合陶瓷具有潜在的应用前景。
Superfine hydroxyapatite powders as the precursor, were precipitately prepared and then pressed and sintered intoporous ceramic with the presence of wollastonite in common atmosphere. By means of XRD, SEM and mechanical tests, conclusions canbe drawn that, precipitation is an effective way to synthesize superfine HA powder. At the condition of pH=9.5 and 95℃, pure HApowder with average particle size of 500nm can be obtained with PEG 20 000 as the dispersant. Calcination at 800℃ can improve thecrystallization of HA but has little influence on the mechanical strength of ceramic. However, the addition of wollastonite can greatlyenhance the mechanical strength of porous ceramic. Therefore, porous hydroxyapatite / wollastonite has a promising application in futureas the implant material.
出处
《中国非金属矿工业导刊》
2004年第4期25-28,36,共5页
China Non-Metallic Minerals industry
