烧结温度对钡长石多孔陶瓷结构与性能的影响  

Effect of Sintering Temperature on Microstructure and Properties of BaAl2Si2O8 Porous Ceramics

作　　者：熊必陈 廖红卫 刘溧 黄骏 陈明昆 刘巧文 XIONG Bichen;LIAO Hongwei;LIU Li;HUANG Jun;CHEN Mingkun;LIU Qiaowen(Changsha University of Science and Technology,Changsha 41000,China;Jiangsu Baifu Technology Co.,Ltd,Yixing 214221,China)

机构地区：[1]长沙理工大学材料科学与工程学院,长沙410000 [2]江苏拜富科技股份有限公司,宜兴214221

出　　处：《中国陶瓷》2022年第10期31-36,共6页China Ceramics

基　　金：火炬计划(NO.2014GH561172)资助项目。

摘　　要：钡长石系微晶玻璃具有耐高温、热膨胀系数低、抗氧化性好等优点,已广泛应用于集成电路基板、微波元器件、雷达天线罩等领域,但钡长石多孔陶瓷少见报道。以熔融法制备的含锂钡长石玻璃粉为原料,采用添加造孔剂法和无压烧结法在850~975℃制备了钡长石多孔陶瓷,有望应用于三元催化载体、红外燃烧板等领域。用X射线衍射和扫描电子显微镜对样品的物相组成和显微结构进行分析,研究了烧结温度对钡长石多孔陶瓷物相组成和微观结构的影响。结果表明,随着烧结温度的提高,样品的物相组成由六方相、单斜相共存转变为单一的单斜相,显气孔率逐渐下降,同时抗弯强度呈增加趋势。BaAl_(2)Si_(2)O_(8) glass-ceramics have been widely applied in integrated circuit substrates,microwave components,radar radome and other fields due to their high temperature resistance,low thermal expansion coefficient and great oxidation resistance.However,BaAl_(2)Si_(2)O_(8) porous ceramics are rarely reported.The BaAl_(2)Si_(2)O_(8) porous ceramics were prepared by adding pore-forming agent and pressureless sintering at 850~975℃with the BaAl_(2)Si_(2)O_(8) glass powder prepared by melting method as a raw material,which is expected to be applied in the fields of ternary catalytic carrier and infrared combustion plate.The phase composition and microstructure of specimens were analyzed by X-ray diffraction and scanning electronic microscopy.The effect of sintering temperature on the phase composition and microstructure of BaAl_(2)Si_(2)O_(8) porous ceramics were investigated.The results show that with the increase of sintering temperature,the phase composition of the samples transform from the coexistence of hexagonal phase and monoclinic phase to a sole monoclinic phase,and the apparent porosity decrease gradually,while the flexural strength showed an increasing trend.

关 键 词：多孔陶瓷 钡长石 烧结温度 孔结构 气孔率 

分 类 号：TQ174.75[化学工程—陶瓷工业]