저온 소결 세라믹스용 SiO2-B2O3-R(CaO, BaO, ZnO, Bi2O3) 붕규산염계 세라믹/유리 복합체의 특성

초록

The effects of B2O3-SiO2-R(R;CaO, BaO, ZnO, Bi2O3) borosilicate glass system on the sintering behavior and microwave dielectric properties of ceramic/glass composites were investigated as functions of modifier, glass addition (30～50 vol%) and sintering temperature (500～900 ℃ for 2 hrs). The addition of 50 and 45 vol% glass ensured successful sintering below 900 ℃. Sintering characteristics of the composites were well described in terms of modifier. Borosilicate glass enhanced the reaction with Al2O3 to form pores, second phases and liquid phases, which was responsible to component of modifier. Dielectric constant (εr), Q×fo and temperature coefficient of resonant frequency (τf) of the composite with 50 and 45 vol% glass contents(B2O3:SiO2:R=25:10:65) demonstrated A-CaBS(7.8, 2,560 GHz, -81 ppm/℃), A-BaBS(5.8, 3,130 GHz, -64 ppm/℃), A-ZnBS(5.7, 17,800 GHz, -21 ppm/℃), A-BiBS(45 vol% glass in total)(8.3, 2,700 GHz, -45 ppm/℃) which is applicable to substrate requiring an low dielectric properties.

키워드