2023年 02期

异丁烯-马来酸酐共聚物凝胶注模成型制备多孔氮化硅陶瓷

Preparation of Porous Silicon Nitride Ceramics by Using Gel Casting of Isobutylene-Anhydride Maleic Copolymer


摘要(Abstract):

以不同粒径的氮化硅粉为原料,采用异丁烯-马来酸酐共聚物凝胶注模成型制备多孔氮化硅陶瓷,研究不同粒径氮化硅颗粒在异丁烯-马来酸酐共聚物水溶液中的分散性及氮化硅颗粒浆料的流变性能,对烧结样品的物相、微观形貌和结构以及介电性能进行表征与分析。结果表明:粒径小于0.5μm的氮化硅颗粒在异丁烯-马来酸酐共聚物水溶液中更易团聚而沉降,氮化硅颗粒浆料的黏度、切应力比粒径为1~3μm的氮化硅颗粒浆料的大;不同粒径原料制备的氮化硅陶瓷的主晶相为α-氮化硅和β-氮化硅,样品的烧结收缩率、密度差异较小,孔隙率约为20%,抗弯强度均大于400 MPa。

关键词(KeyWords): 多孔氮化硅陶瓷;凝胶注模成型;异丁烯-马来酸酐共聚物;抗弯强度

基金项目(Foundation): 国家自然科学基金项目(51872118,51632003);; 山东省重点研发计划项目(2020JMRH0401);; 山东省自然科学基金项目(ZR2018PEM008,ZR2019MEM055);; 材料复合新技术国家重点实验室(武汉理工大学)开放基金项目(2021-KF-18)

作者(Author): 孙宁,杨海玲,王志,孙孟勇,史国普,冀珺,李庆刚

DOI: 10.13349/j.cnki.jdxbn.20221114.002

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