LI Yuping ¹, GAO Pengzhao ¹, LI Rongzheng ¹, YANG Xuejiao ¹, CHEN Gongtian ²

( 1.College of Materials Science and Engineering, Hunan Univers ity, Changsha 410082; 2.Department of microwave ceramic of Gos swell Group Hunan Chenzhou, 423025)

Abstract: Electrical-thermal and microwaves intering methods were used to prepare the ZST microwave dielectric ceramics .The s intering properties,micros tructure,component and microwave dielectric properties of ceramics were s tudied.The results showed that compared with electrical-thermals intering, the microwave s intering can decrease the s intering temperature by about 70℃,decreased the s intering time,and also decrease the s tandard deviation of dens ity dis tribution;the crys talline of s intering ceramics is orthorhombic-type crystal structure (Zr_0.8Sn_0.2)TiO₄, and with the increas ing of s intering temperatures,there was no new phase exis ted on materials;the size of crys talline was distribute uniformityuniform in size,and combine compact in combination; The value of !r and Q of ZST increased with the increase of s intering temperature, and their correspondeding values increased by 17.5% and 14.3% respectively, compared with electrical- thermal s intering.

Keywords: ZST microwave dielectric ceramics,microwave s intering, dens ity distribution, crys talline size