Effect of Oxygen Partial Pressure During Liquid‐Phase Sintering on the Dielectric Properties of 0.9MgTiO₃–0.1CaTiO₃

Abstract

Microstructural evolution and microwave dielectric properties of liquid‐phase‐sintered 0.9MgTiO3–0.1CaTiO3 dielectric ceramic material have been investigated as a function of oxygen partial pressure () during sintering. Sintering in a weakly reducing atmosphere (=10−14 atm) generally increased the density, permittivity, quality factor (Q×f), and the temperature coefficient of resonance frequency (τf), but further reducing atmosphere down toof 10−14 atm generally decreased Q×f and τf. When the 5 wt% lithium borosilicate glass‐added specimen was sintered at 950°C and=10−14 atm, it demonstrated a permittivity of 18.8, Q×f of 19 000 GHz, and τf of 10 × 10−6 K−1.

Investigation of structural and optical properties of CaTiO3 powders doped with Mg2+ and Eu3+ ions

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Dielectric characteristics and sintering behavior of Mg2TiO4–(Ca0.8Sr0.2)TiO3 ceramic system at microwave frequency

“…Zero f (temperature coefficient of resonant frequency) is also one of the major requirements for dielectric materials to allow a frequency-stable passive component. The most convenient and promising way to achieve a zero f is to combine two compounds having negative and positive f values to form a solid solution or mixed phases [2,3]. However, high dielectric constant materials generally exhibit high dielectric loss (low Q × f * Corresponding author.…”