Microwave Dielectric Properties of Ba(Mg1/2W1/2)O3–BaTiO3 Ceramics

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概要

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• Ceramics with the chemical formula x Ba(Mg1/2W1/2)O3–(1-x) BaTiO3 (x=0.40–1.0) are prepared for use as dielectric resonators. The specimens were investigated by X-ray diffraction analysis, scanning electron microscopy and transmission electron microscopy. As x decreased from 1.0 to 0.40, the temperature coefficient of resonant frequency increased gradually from -33 to +303.5 ppm/°C. At x=2/3, the Q×f value increased markedly. The crystal structure with a Mg–W ordered B-site sublattice changed to a crystal structure with a Mg–W–Ti ordered B-site sublattice at x=0.84–0.72. Ba(Mg1/3W1/3Ti1/3)O3 is formed at x∼2/3, and has excellent dielectric properties (ε r=14.5, Q×f=107000 ( GHz), τ f=-7.6 ppm/°C). The B-site cation of Ti improved the stability of the temperature coefficient of resonant frequency (TCF) for Ba(Mg1/2W1/2)O3 (τ f=-33 ppm/°C).

• INSTITUTE OF PURE AND APPLIED PHYSICSの論文
• 1997-09-15

著者

• TAKAHASHI Hiromi

  Oki Electric Industry Co., Lid., Microdevice Department Microsystem Technology Laboratory

• AYUSAWA Kazutoshi

  Oki Electric Industry Co., Lid., Microdevice Department Microsystem Technology Laboratory

• SAKAMOTO Nobuyoshi

  Oki Electric Industry Co., Lid., Microdevice Department Microsystem Technology Laboratory

• Sakamoto Nobuyoshi

  Oki Electric Industry Co., Ltd., Microdevice Department, Microsystem Technology Laboratory,

• Takahashi Hiromi

  Oki Electric Industry Co., Ltd., Microdevice Department, Microsystem Technology Laboratory,

関連論文

• Ba-Mg-W-Ti-O Ceramics with Temperature-Stable Low Microwave Loss
• Microwave Dielectric Properties of Ba(Mg_W_)O_3-BaTiO_3 Ceramics
• Ba–Mg–W–Ti–O Ceramics with Temperature-Stable Low Microwave Loss
• Microwave Dielectric Properties of Ba(Mg1/2W1/2)O3–BaTiO3 Ceramics

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