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Effect of crystallization on microwave dielectric properties of stoichiometric cordierite glasses containing B2O3 and P2O5

Published online by Cambridge University Press:  31 January 2011

Jenn-Ming Wu  and
Hong-Lin Huang
Jenn-Ming Wu
Affiliation:
Department of Materials Science and Engineering, National Tsing-Hua University, Hsinchu, Taiwan 30043, Republic of China
Hong-Lin Huang
Affiliation:
Department of Materials Science and Engineering, National Tsing-Hua University, Hsinchu, Taiwan 30043, Republic of China
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Extract

The effect of crystallization on microwave dielectric properties of cordierite glasses containing B2O3 and P2O5 additions was investigated. Two glasses containing 5 wt% B2O3/5 wt% P2O5 and 7.5 wt% B2O3/7.5 wt% P2O5 were studied. Both glasses were sintered to nearly full density at temperatures as low as 860 °C. The frequency constant and quality factor of α cordierite are, respectively, about five times and two times larger than those of glassy phase and μ cordierite. The temperature coefficients of resonant frequency are estimated to be about −13, −55, and −15 ppm/°C for glassy phase, μ cordierite, and α cordierite, respectively. As a result of the microwave dielectric properties of the individual phase, cordierite glasses containing α cordierite possess the best microwave properties.

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Journal of Materials Research , Volume 15 , Issue 1 , January 2000 , pp. 222 - 227
Copyright
Copyright © Materials Research Society 2000

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