微波LTCC环行器用热压烧结SrFe_(12)O_(19)铁氧体的低温烧结特性（英文）  

Low Temperature Sintering Characteristics of Hot Press Sintered SrFe_(12)O_(19) Ferrites for Use in Microwave LTCC Circulators

作　　者：彭龙[1] 李乐中[1] 王瑞[1] 涂小强[1] 胡云[1] 

机构地区：[1]成都信息工程学院四川省信息材料及器件化应用高校重点实验室,四川成都610225

出　　处：《稀有金属材料与工程》2017年第4期951-954,共4页Rare Metal Materials and Engineering

基　　金：The Scientific Research Foundation of Education Office of Sichuan Province(13Z198);The Young and Middle-aged Academic Leaders of Scientific Research Funds of Chengdu University of Information Technology(J201222)

摘　　要：为了与低温共烧陶瓷(LTCC)技术兼容,采用热压烧结工艺在870℃制备了添加不同Bi_2O_3含量的SrFe_(12)O_(19)铁氧体材料,着重研究了材料的晶相组成、烧结密度、气孔率和磁性能等低温烧结特性。研究结果表明,材料在870℃烧结时,Bi_2O_3的添加促进了SrFe_(12)O_(19)晶相结构的形成,提高了材料的烧结致密度和磁性能。当Bi_2O_3的添加量(质量分数)为2%~4%,材料可以获得致密的结构,烧结密度达到4.65 g·cm^(-3)以上,气孔率低于10%,材料的饱和磁化强度Ms和内禀矫顽力Hci较高,分别达到252.4 k A·m^(-1)和312.9k A·m^(-1)以上。此外,基于SrFe_(12)O_(19)材料的低温烧结特性讨论了该材料在微波LTCC环行器当中的应用。The SrFe12O19 ferrites with different amounts of Bi2O3 additive were prepared by a hot press sintering process at a low fired temperature of 870 ℃ in order to be compatible to the LTCC （low temperature co-fired ceramics） technology, and their low temperature sintering characteristics were investigated, including the crystal phase composition, sintering density, porosity, and magnetic properties. Results show that the addition of Bi2O3 promotes the formation of SrFe12O19 phase structure and increases the sintering compactness and magnetic properties of the ferrites fabricated at 870 ℃. The ferdtes with Bi2O3 content from 2 wt% to 4 wt% exhibit a compact microstructure with sintering density higher than 4.65 g·cm^3 and porosity lower than 10%, which contributes to the enhanced saturation magnetization Ms and intrinsic coercivity Hci above 252.4 kA·m^-1 and 312.9 kA·m^-1, respectively. Moreover, the potentiality of the SrFe12O19 ferdtes for use in microwave LTCC circulators was also discussed based on their low temperature sintering characteristics.

关 键 词：SrFe12O19铁氧体 LTCC 热压烧结 环行器 

分 类 号：TM277[一般工业技术—材料科学与工程]