摘要氧化锆纤维是一种性能优良的特种无机纤维，耐高温、耐腐蚀、抗氧化，具有广泛的应用前景。本实验采用溶胶-凝胶法制备立方相稳定氧化锆（ZrO2）纤维，以碱式碳酸锆、醋酸（CH3COOH）、蒸馏水（H2O）为原料，硝酸钇（Y(N03)3）为相稳定剂，通过一步混合反应获得纺丝性能优异的醋酸聚锆前驱体，再进行离心纺丝、热处理得到缺陷少、强度高的氧化锆纤维。借助DSC-TG分析纤维在热处理过程中组分变化情况，借助XRD判断不同热处理下相的成分和结晶程度，借助SEM观察纤维的微观形貌，判断纤维的质量优劣，最终制定氧化锆纤维的热处理工艺: 低于500℃时缓慢升温以减少纤维缺陷，使结晶完全，500℃后适当加快升温速率，促进晶界的融合。87841

毕业论文关键词  氧化锆纤维  溶胶-凝胶  可纺性  热处理

毕业设计说明书外文摘要

Title    Preparation and Characterization of zirconia fibers       

Abstract Zirconia fiber is a kind of special inorganic fiber with excellent properties such as high temperature resistance, corrosion resistance and oxidation resistance, and it has broad application prospects。 In this study, we use the sol-gel method to prepare cubic stabilized zirconia (ZrO2) fiber, and take zirconium basic carbonate, acetic acid (CH3COOH) and distilled water (H2O) as raw materials。 Then Yttrium nitrate (Y(N03)3) is used as phase stabilizer。 The   zirconium acetate precursor with excellent spinning performance was obtained by one step mixing reaction。 Zirconia fibers with few defects and high strength can be prepared by centrifuging spinning and heat treatment。 The change of the components of the fiber during heat treatment was analyzed by means of differential scanning calorimetry (DSC-TG) and by X-ray diffraction (XRD), the composition and crystallinity of different heat treatment phases were judged。 Then scanning electron microscopy (SEM) to observe the micro morphology of the fibers to judge the quality of the fiber。 And ultimately we develop the heat treatment process of zirconia fiber： When the temperature is lower than 500, the heating rate should be slowly to reduce the fiber defects, so that the crystallization is complete, and the heating rate is accelerated after 500 so that the fusion of grain boundaries is promoted。源-于,优Y尔E论W文.网wwW.yOueRw.com 原文+QQ752018`766

Keywords  Zirconia fibers  Sol-gel method  Spinnability   Heat treatment

目  次

1  绪论 1

1。1  陶瓷纤维材料。。。1

1。2  氧化锆纤维材料及其制品2

1。3  溶胶-凝胶（Sol-Gel）法制备陶瓷纤维5

1。4  离心纺丝技术。。。8

1。5  课题的研究内容。。9

2  制备氧化锆纤维 10

2。1  实验方案与流程11

2。2  实验过程。。12

2。3  结果与讨论。14

结论18From+优`尔^文W网wWw.YouErw.com 加QQ75201^8766致谢 19

参考文献20

1  绪论

1。1  陶瓷纤维材料

1。1。1  陶瓷纤维的特点和发展现状

现如今，陶瓷纤维被广泛应用于各行各业的各类热工窑炉中，它是一种轻质的、绝热的、耐高温的、性能优异的材料，同时具有纤维的可纺织加工特性以及陶瓷的耐高温性能[1]。因为相较于其他耐火材料而言，它的容重非常低，是以蓄热十分小，在隔热方面效果很是明显，常常作为炉衬材料来减少热工窑炉的能源消耗。另外一面，考虑到陶瓷纤维在物理特征上跟传统的耐火材料相比完全不同，所以它在应用技术和方法上面对热工窑炉的砌筑来说也是意义非凡的。