Piexoelectric Ceramics of <TEX>$Pb(Mn_{1/3} Nb_{2/3})O_3-PbTiO_3-PbZrO_3$</TEX> for Band Pass Filter

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J. Korean Ceram. Soc. > Volume 23(3); 1986 > Article

Journal of the Korean Ceramic Society 1986;23(3): 21.

$Pb(Mn_{1/3} Nb_{2/3})O_3-PbTiO_3-PbZrO_3$ 계 압전 세라믹의 필터로서의 응용

류영대, 조상희¹

금성전자주식회사
¹경북대학교 재료공학과

Piexoelectric Ceramics of $Pb(Mn_{1/3} Nb_{2/3})O_3-PbTiO_3-PbZrO_3$ for Band Pass Filter

ABSTRACT

In this study the system of $Pb(Mn_{1/3} Nb_{2/3})O_3-PbTiO_3-PbZrO_3$ piexoelectric ceramics was made in the radial mode disk and attenuation characteristic of the desinged ladder type filter was investigated. What is more temperature dependance of resonant frequency and variation of resonant frequency was examined by chan-ging the electrode diameter of piezoelectric resonator. (A Group : De=11mm, B Group : De=7.5mm and C Gro-up : De=5.5mm) Upon investigation it was the following. The center frequency of A, B and c filter showed up in the 200KHz, 270KHz and 380KHz respectively. As the electrode diameter decreased center frequency in creased abruptly. As the Co_2/Co1 increased attenuation characteristics and selectivity was improved. As the x=50. resonant frequ-ency invaried with variation of temperature.