Ultra-Low Firing High-k Scheelite Structures Based on [(Li0.5Bi0.5)xBi1−x][MoxV1−x]O4 Microwave Dielectric Ceramics
Abstract:In this work, dense ceramic samples across the solid solution of the [(Li0.5Bi0.5)xBi1−x][MoxV1−x]O4 system are prepared using the solid-state reaction process. The monoclinic phase region could be obtained for 0≤x<0.098 and the scheelite tetragonal solid solution region could be obtained for 0.098<x≤1. When x=0.098, the boundary composition [(Li0.5Bi0.5)0.098Bi0.902][Mo0.098V0.902]O4 could be readily sintered at 650°C and also have excellent microwave properties with a high relative permittivity of 81, and a Q×f value of 8000 GHz and a low temperature coefficient of +9.7 ppm/°C. This ceramic is chemically compatible with both Al and Cu electrode materials at its sintering temperature. It can be an excellent candidate for ultra-low-temperature co-fired ceramic technology and is the highest permittivity microwave material found to date with sintering considerations as low as 650°C.
Document Type: Research Article
Affiliations: 1: Center for Dielectric Studies, Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802 2: Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, China
Publication date: 2010-08-01