中文摘要：

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8OO和1OOO℃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，1000℃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。

英文摘要：

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.