前驱体聚合物转化法制备SiBNC陶瓷纤维的热解过程研究  

Pyrolysis of Polymer-Derived SiBNC Ceramic Fibers

作　　者：彭雨晴[1] 张婧[1] 韩克清[1] 牟世伟[1] 余木火[1] 

机构地区：[1]纤维材料改性国家重点实验室东华大学材料科学与工程学院,上海201620

出　　处：《陶瓷学报》2014年第1期7-11,共5页Journal of Ceramics

基　　金：国家自然科学基金项目(编号:20704005和90916025)

摘　　要：采用前驱体聚合物转化法制备SiBNC陶瓷纤维。通过高温热失重分析(TGA)、色谱-质谱联用技术(GC-MS)、傅里叶变换红外光谱(FTIR)以及元素分析(EA)等手段对前驱体纤维的热解过程进行了研究。研究结果表明,前驱体纤维从室温升至1500℃的过程中出现三段明显的热失重区域,结合FTIR和GC-MS分析可知在室温至800℃的升温过程中化学结构出现显著变化,并且主要逸出了甲胺和甲烷气体,同时EA结果显示碳含量明显下降,当热解温度达到800℃时陶瓷化转变过程基本完成。1600℃时热解得到的SiBNC陶瓷纤维主要结构为B-N、Si-N。SiBNC ceramic fibers were prepared by a polymer derived ceramic route.The pyrolysis process of precursor fibers was investigated via TGA,FTIR,GC-MS and EA.The results showed that there were three weight loss ranges during the pyrolysis ofpreceramic polymer fibers in nitrogen atmosphere.Observed in combination with FTIR and GC-MS techniques,the chemical structure changed significantly due to the release of methylamine and methane in the temperature range from room temperature to 800 ℃,and the EA results exhibited that the carbon content decreased obviously.The ceramization was completed when the temperature was up to 800 ℃.Bonds of B-N and Si-N existed in the structure of the resultant SiBNC ceramic fibers pyrolyzed at 1600 ℃.

关 键 词：SiBNC 陶瓷纤维 前驱体聚合物转化法 热解 

分 类 号：TQ174.75[化学工程—陶瓷工业]