ZrO_2包覆CaO-MgO-SiO_2陶瓷纤维的制备及其性能  

Preparation and properties of ZrO_2 coated CaO-MgO-SiO_2 ceramic fiber

作　　者：刘浩[1] 王玺堂[1] 王周福[1] 张保国[1] 

机构地区：[1]武汉科技大学耐火材料与高温陶瓷国家重点实验室培育基地,湖北武汉430081

出　　处：《耐火材料》2012年第2期87-89,共3页Refractories

基　　金：国家自然科学基金资助项目(51004080);耐火材料与高温陶瓷国家重点实验室培育基地开放基金(G201004)

摘　　要：为了解决CaO-MgO-SiO2陶瓷纤维在使用过程中析晶、粉化的问题,采用非均相成核法在CaO-MgO-SiO2陶瓷纤维表面制备了ZrO2涂层。用场发射扫描电子显微镜观察ZrO2包覆层,用X射线衍射仪分析800和1 000℃热处理后原始纤维和ZrO2包覆纤维的晶相变化,并检测了二者在模拟肺液中的溶解性能。结果表明:包覆处理后,CaO-MgO-SiO2陶瓷纤维表面形成了一层ZrO2包覆层;ZrO2包覆层的存在可以显著抑制800℃时纤维的析晶,1 000℃时只能抑制纤维中方石英的析出,对其他物相的析晶没有明显抑制作用;ZrO2包覆层的存在降低了纤维在模拟肺液中的早期溶解速率,但对纤维的长期生物可溶性影响不大。In order to inhibit the crystallization and pulverization of CaO-MgO-Si2 ceramic fiber at high temperatures,the ZrO2 coating on CaO-MgO-SiO2, ceramic fiber was formed by heterogeneous-nucleation method. The crystal phase compositions of the original fiber and ZrO2 coated fiber fired at 800℃ and 1000℃ were analyzed by X-ray diffractometer, and their solubility in Gamble solution was determined. The results show that：（ 1 ）a dense ZrO2 coating is formed on the surface of fiber;（2）the coating on fiber can inhibit the precipitation of crystals at 800℃ markedly and at 1000 ℃ it only can inhibit the precipitation of cristobalite and has little effects on other crystal phases; （3） the coating decreases the initial dissolution rate of the fiber in Gamble solution and has little effect on long-term bio-solubility of fiber.

关 键 词：CaO-MgO-SiO2陶瓷纤维 ZrO2涂层 析晶 生物可溶性 

分 类 号：TQ175.72[化学工程—硅酸盐工业]