Low-Temperature Sintering and Microwave Dielectric Properties of CaWO4-Mg2SiO4 Ceramics

Chung Long Pan; Ping Cheng Chen; Tsu Chung Tan; Wei Cheng Lin; Chun Hsu Shen; Shin Hung Lin

doi:10.4028/www.scientific.net/AMR.933.12

Paper Titles

Preface and Organizing Committee

Study on Thermal Conductivity of Multilayer Graphene/NR Composite
p.3

Synthesis of Spherical La₂Mo₂O₉ Nanoparticles Using Sol-Gel Process
p.8

Low-Temperature Sintering and Microwave Dielectric Properties of CaWO₄-Mg₂SiO₄Ceramics
p.12

Synthesis and Catalytic Activity of Fe-MCM-41 Nanoparticles
p.17

Facile Systhesis La-Doped Nanoceria and Loaded Silver Nanoparticles Scavenging Hydroxyl Radicals
p.23

High Temperature Deformation and Corrosion Behavior of 2205 Duplex Stainless Steel under Low Strain Rate of 0.005 s^-1
p.27

Cr and Ni Recovery and Oxidational Dephosphorization of Stainless Steel Dust during the Iron-Bath Smelting Reduction Process
p.32

Photochromic Inhibition of Dyed Veneer Covered with Modified Transparent Film
p.38

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Low-Temperature Sintering and Microwave Dielectric Properties of CaWO₄-Mg₂SiO₄Ceramics

Abstract:

The effect of V₂O₅ addition on the microstructures and the microwave dielectric properties of 0.9CaWO₄-0.1Mg₂SiO₄(9CWMS) ceramics prepared by conventional solid-state routes have been investigated. The V₂O₅ were selected as liquid phase sintering aids to lower the sintering temperature of 9CWMS ceramics. A small amount of V₂O₅ (0.25~1 wt%) were used for sintering aid and led to high densification at 1050°C. The dielectric properties of 9CWMS ceramics with V₂O₅ additions are strongly dependent on the densification, the microstructure. As the amount of V₂O₅ additives increased from 0.25 to 1.0 wt%, the dielectric constantsεrdecreased following the trend with density. The quality values Qdecreased with the increase of V₂O₅ amount for all sintering temperatures. The 0.25 wt% V₂O₅-doped 0.9CaWO₄-0.1Mg₂SiO₄ ceramicssintered at 1080°C for 2 h had the optimum dielectric properties: εr= 5.7; Q×f= 73000 (at 14 GHz).