微波烧结微波介质陶瓷的研究进展  

Research Progress on Microwave Dielectric Ceramics Prepared viaMicrowave Sintering

作　　者：刘锦 梁炳亮[1] 张建军[1] 艾云龙[1] LIU Jin;LIANG Bingliang;ZHANG Jianjun;AI Yunlong(School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌航空大学材料科学与工程学院,南昌330063

出　　处：《材料导报》2022年第3期130-139,共10页Materials Reports

基　　金：国家自然科学基金(51664043;51861026);国家留学基金委(201708360036)。

摘　　要：随着通信行业的发展,尤其是5G商用时代的来临,微波介质陶瓷的开发与探索成了近年来的研究热点。目前通常采用常压固相烧结的方式来制备微波介质陶瓷,但烧结温度较高、加热速度慢,且烧结时间过长,不仅会导致资源的损耗,还可能导致晶粒的异常长大。为了降低陶瓷材料的烧结温度,通常会添加烧结助剂,如B_(2)O_(3)、CuO等,但加入烧结助剂会引入第二相从而影响微波介电性能。作为一种高效的烧结方法,微波烧结技术是在烧结过程中通过微波与材料粒子的相互作用或微波与基本微观结构耦合产生的热量进行加热,不仅能降低烧结温度、缩短烧结时间,还能改善材料的显微组织,因此,近年来微波烧结成为研究者关注的焦点。采用微波烧结制备的微波介质陶瓷在各个领域中都有应用,如Mg_(2)TiO_(4)陶瓷用于多层电容器和微波谐振器,BaTiO_(3)陶瓷用于多层陶瓷电容器(MLCC)和随机存取存储器(RAM),MgTiO_(3)陶瓷用于微波滤波器、通信天线和微波频率全球定位系统,TiO_(2)陶瓷用于电容器和低温共烧陶瓷基板等。不仅如此,采用微波烧结制备的微波介质陶瓷还表现出优异的化学稳定性和力学性能,如LiAlSiO_(4)基陶瓷、MgO-B_(2)O_(3)-SiO_(2)基陶瓷等在多层陶瓷基板与微波集成电路中都有广泛的应用。微波烧结技术为制备优异的材料提供了可能,还可用于在各种粉末的制备,实现性能的进一步提升。本文综述了微波烧结制备微波介质陶瓷的研究进展,总结了常规烧结和微波烧结对材料性能的影响,并指出采用微波烧结制备的微波介质陶瓷目前存在的问题与发展趋势。With the gradual development of the communication industry,especially the advent of the 5G commercial era,the development and exploration of microwave dielectric ceramics have become a research hotspot in recent years.Normal pressure solid phase sintering is usually used to prepare microwave dielectric ceramics.However,this sintering method causes not only loss of resources but also abnormal growth of crystal grains,due to relatively high temperature,slow heating rate and long preparation time.In order to reduce the sintering temperature of the ceramic material,sintering additive(for example,B_(2)O_(3)or CuO)was added,but the addition of sintering additive would introduce the second phase and deteriorate the microwave dielectric properties.As an efficient sintering method,microwave sintering can reduce the sintering temperature,shorten the sintering time and improve the microstructure of the material,because the materials are heated by the direct interaction of the microwave and the particles,or the coupling of microwave and the basic microstructure of materials.Therefore,microwave sintering has become the focus of many researchers.Microwave dielectric ceramics prepared by microwave sintering have been applied into various fields.For example,Mg_(2)TiO_(4)ceramic is used for multilayer capacitors and microwave resonators,BaTiO_(3)ceramic is used for multilayer ceramic capacitors(MLCC)and random access memory(RAM),MgTiO_(3)ceramic is used for microwaves filters,communication antennas and microwave frequency global positioning systems,and TiO 2 ceramic is used for capacitors and low-temperature co-fired ceramic substrates.Besides that,the microwave dielectric ceramics prepared by microwave sintering also show the characteristics of excellent chemical stability and mechanical properties,such as LiAlSiO_(4)-based ceramics,MgO-B_(2)O_(3)-SiO_(2)-based ceramics,etc.These ceramic materials are widely used in multilayer ceramic substrates and microwave integrated circuits.Microwave sintering technology provides the possib

关 键 词：微波烧结 微波介质陶瓷 微波介电性能 微波谐振器 

分 类 号：TQ174[化学工程—陶瓷工业]