Effect of H₃BO₃ Additive and Forming Pressure on Microwave Dielectric Properties of 0.95MgTiO₃-0.05CaTiO₃

Abstract:

0.95MgTiO₃-0.05CaTiO₃ (95MCT) microwave dielectric ceramics was prepared solid-state reaction method. Effect of H₃BO₃ additive and forming pressure on sintering process, microstructure and microwave dielectric properties of 95MCT were investigated. The result showed that the additive of H₃BO₃ can lower the sintering temperature of 95MCT, and improve the densification of 95MCT. MgTi₂O₅ was found as mesosphere, which can be effectively suppressed through the additive of H₃BO_3. Excellent microwave dielectric properties of ceramics was obtained when the H₃BO₃ additive was 0.50wt%. The best value of dielectric constant (ε_r), quality factor (Q×f) and temperature coefficient of resonant frequency (τ_f ) of 21.54, 67,286GHz and-4.1ppm/^oC was obtained for the ceramics with sintering 1220^oC for 2h.

• Periodical: Advanced Materials Research (Volumes 941-944)
• Pages: 521-524
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.941-944.521
• Online since: June 2014
• Authors: Jin Bao Huang*, Yi Xiang Cai, Zhao Xian Xiong, Hao Xue
• Keywords: 95MCT, H₃BO₃, Microwave Dielectric Properties, Sintering

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