文献类型：期刊文献

英文题名：Preparation of porous biological glass-ceramic in the system Mg-Ca-Si-P-F with controlled pore size and porosity

作者：He, F; Liu, CS

机构：[1]E China Univ Sci & Technol, Shanghai 200237, Peoples R China

年份：2003

卷号：32

起止页码：644

外文期刊名：RARE METAL MATERIALS AND ENGINEERING

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000223266400169)】；

语种：英文

外文关键词：biological glass; porosifier; porous; preparation

摘要：Porous biological glass-ceramic with interconnecting pores was prepared through adding porosifier, and its processing and properties were studied. The main crystallized products of porous glass-ceramic are fluoroapatite and beta-wollastonite, and its porosity ranges from 56%similar to82%. The pores mainly consist of the macropores 250 mum similar to850 mum in diameter formed through the pyrolysis of porosifier, and they interconnect through the holes 50 mum similar to300 mum in diameter on pore walls. There are still a few micropores 2 mum similar to4mum in diameter formed through incomplete sintering of glass particles, existing in pore wall. The compressive strength increase with the increases of sintering temperature and time, but decreases when sintered at high temperature for long time, and it correlates the total porosity by conic with certain pore diameter. At certain porosifier content, the sintering temperature and time almost have no effect on porosity. Because the macropore diameter is determined by porosifier size, and porosity has a linear relationship with porosifier content when if the porosifier size is certain, the porosity and pore diameter can be controlled through controlling the porosifier content and its size.