高能球磨法制备MgNb_2O_6粉体及其陶瓷性能  

Preparation of MgNb_2O_6 Powders by Using High-energy Ball-milling Method and the Properties of MgNb_2O_6 Ceramics

作　　者：付志粉[1] 马建立[1] 高娟[1] 刘鹏[2] 

机构地区：[1]安徽理工大学理学院,安徽淮南232001 [2]陕西师范大学物理学与信息技术学院,西安710062

出　　处：《科技导报》2013年第19期62-65,共4页Science & Technology Review

基　　金：安徽理工大学博/硕士基金项目

摘　　要：采用高能球磨法在800℃保温2h预烧合成MgNb2O6粉体,研究了MgNb2O6陶瓷的相结构、显微结构和微波介电性能随烧结温度的变化关系。实验结果表明,高能球磨法有效促进MgNb2O6粉体的低温合成,降低MgNb2O6陶瓷的烧结温度。1220℃保温2h烧结MgNb2O6陶瓷,密度为4.80g/cm3,平均粒径为3.5μm,介电常数εr为19.7,品质因数(Q.f)为29444GHz的优良微波介电性能,MgNb2O6粉体有望成为新一代中温烧结高频微波介质基板材料。By using high-energy ball-milling method, MgNb2O6 powders were synthesized at 800℃ for 2h. Meanwhile, phase transition, sintering behavior, mierostructures, and microwave dielectric properties of MgNb2O6 ceramics changing with sintering tempreature were investigated. It is found that the calcining temperature of MgNb2O6 powders and the sintering temperature of MgNb2O6 ceramic are able to be effectively reduced. The pottery of MgNb2O6 sintered at 1220℃ for 2h possesses the average grain size of 3.5μm, ρ= 4.80g/cms, and excellent microwave dielectric properties of r=19.7 and quality factor Q. f=29444GHz. Therefore, MgNb206 pottery obtained by the high energy ball-milling method makes itself become an appropriate candidate for the new generation of middle-temperature sintered high frequency microwave dielectric material

关 键 词：高能球磨法 MgNb2O6 微波介质陶瓷 

分 类 号：TM282[一般工业技术—材料科学与工程]