温度制度对氧化铝陶瓷烧结性能影响的研究  

Study of the Effect of Temperature Regime on the Sintering Properties of Alumina Ceramics

作　　者：李凡树 侯宪钦[1] Li Fanshu;Hou Xianqin(School of Materials,Jinan University,Jinan 250024,China)

机构地区：[1]济南大学材料学院,山东济南250024

出　　处：《广东化工》2024年第20期36-39,共4页Guangdong Chemical Industry

基　　金：山东省中小企业重点研发项目(2022TSGC2258)。

摘　　要：氧化铝陶瓷因其原料来源广、成本较低、物理及机械性能较为优秀、化学性能十分稳定,因此在日常生产生活中应用十分广泛,在化工、军工、医疗、航空航天等领域发挥了重要作用。由于氧化铝的熔点较高,因此烧结氧化铝陶瓷的过程中能耗较高、对窑炉炉体的损伤大、烧结时间长。研究、制定合适的烧结制度,有利于降低氧化铝陶瓷的烧结温度、减少烧结时间、控制陶瓷的晶粒生长、提高陶瓷的烧结性能,并且响应国家节能减排的号召。本文以α-Al_(2)O_(3)含量为99.99%的造粒粉为原料,通过120 MPa的压力干压成型,并进行常压烧结。对烧结后的陶瓷进行性能表征,探究适合的温度和烧结制度。实验表明:从1000℃开始以8℃/min的速率升温至1500℃,保温1 h,试样相对密度达到97.43%,微观结构较为均匀,力学性能较好,晶粒平均粒径为1.31μm。Alumina ceramics are widely used in daily production and life because of its wide source of raw materials,low cost,excellent physical and mechanical properties,and very stable chemical properties,which play an important role in the fields of chemical industry,military industry,medical treatment,aerospace and so on.Due to the high melting point of alumina,the process of sintering alumina ceramics has high energy consumption,high damage to the kiln body and long sintering time.Research and development of appropriate sintering system is conducive to reducing the sintering temperature of alumina ceramics,reducing the sintering time,controlling the grain growth of ceramics,improving the sintering performance of ceramics,and should be and respond to the national energy saving and emission reduction call.In this paper,granulated powder with 99.99%α-Al_(2)O_(3)content was dry-pressed and molded by 120 MPa pressure and sintered at atmospheric pressure.The properties of the sintered ceramics were characterized to explore the suitable temperature and sintering regime.Experiments show that:starting from 1000℃to 1500℃at a rate of 8℃/min,insulation 1 h,the relative density of the specimen reaches 97.43%,the microstructure is more uniform,the mechanical properties are better,the average grain size of the grain is 1.31μm.

关 键 词：升温速率 保温时间 相对密度 力学性能 烧结温度 

分 类 号：TQ174[化学工程—陶瓷工业]