Effect of Oxygen Partial Pressure During Liquid‐Phase Sintering on the Dielectric Properties of 0.9MgTiO 3 –0.1CaTiO 3
- 17 December 2007
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 91 (1) , 132-138
Abstract
Microstructural evolution and microwave dielectric properties of liquid‐phase‐sintered 0.9MgTiO 3 –0.1CaTiO 3 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 (τ f ), but further reducing atmosphere down to of 10 −14 atm generally decreased Q × f and τ f . 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 τ f of 10 × 10 −6 K −1 .Keywords
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