A Study on the Forsterite Porcelain as a High Frequency Insulator(II) (Influence of <TEX>$BaCO_3$</TEX>, excess MgO on the Properties of Forsterite Porcelain)

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J. Korean Ceram. Soc. > Volume 19(3); 1982 > Article

Journal of the Korean Ceramic Society 1982;19(3): 205.

고주파용 절록재료로서의 Forsterite 자기에 관한 연구(II) (Forsterite 자기 성질에 미치는 과잉 Mg 성분과 $BaCO_3$의 영향)

이웅상, 황성연

한양대학교 무기재료 공학과

A Study on the Forsterite Porcelain as a High Frequency Insulator(II) (Influence of $BaCO_3$, excess MgO on the Properties of Forsterite Porcelain)

ABSTRACT

The method of lowering the sintering temperature and enlarging the range of sintering temperature in the manufacture of forsterite porcelain as a high frequency insulator was investigated. The four kinds of forsterite chamotte were calcinated at $1400^{circ}C$. The forsterite bodies produced by adding $BaCO_3$ as a flux and 5% Kaolin as a bonding agent were heated in the range of sintering temperature. Sintering temperature tended to increase almost straightly as MgO exceded without $BaCO_3$. The range of sintering tem was at least $140^{circ}C$. Specimens of MF-2-0, MF-2-A had superior mechanical strength and dielectric properties. The growing of the forsterite crystal was restricted and thus their grain size became fine and also the amount of crystal formation tended to decrease rapidly as $BaCO_3$ increased excessively.