凝胶注模氧化铝陶瓷坯体的结构与表征  

Structure and token of alumina by gel-casting

作　　者：仝建峰[1] 陈大明[1] 李宝伟[1] 刘晓光[1] 

机构地区：[1]北京航空材料研究院先进复合材料国防科技重点实验室,北京100095

出　　处：《航空材料学报》2004年第6期42-46,共5页Journal of Aeronautical Materials

基　　金：航空科学基金项目(03G21013)

摘　　要：研究了凝胶注模氧化铝陶瓷坯体的密度、强度、空隙率分布及微观结构等特征。结果表明,影响凝胶注模陶瓷坯片密度的因素主要有:料浆的固含量、单体含量、单体和胶联剂的比值。随着料浆固含量的提高,坯片的抗弯强度呈下降趋势,坯片内部的孔隙率降低,从平均孔隙度为110nm降为90nm,而且均为单峰分布。凝胶注模成型的陶瓷坯片在干燥后,坯片强度优于注射成型、流延成型等传统成型方式。The density, strength, cavity proportion and microstructure of the ceramic flans by gel-casting were studied. The research showed that the solid loading, content of monomer and ratio of monomer and crossing linker were the main effect factors on the density. As the solid loading increased, the bend strength of flan decreased, meanwhile, the cavity proportion in flan decreased from 110 nm to 90 nm. The bend strength of ceramic flans by gel-casting was preferable to those by injecting and tape-casting.

关 键 词：凝胶注模 料浆 固含量 氧化铝陶瓷 单体 成型方式 空隙率分布 单峰 表征 平均 

分 类 号：V257[一般工业技术—材料科学与工程] TQ174[航空宇航科学与技术—航空宇航制造工程]