Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Structural and Microwave Dielectric Properties of BMT-BCN Ceramics

BMT-BCN 세라믹의 구조 및 마이크로파 유전특성

  • Lee, Moon-Kee (Dept. of Electronic Materials Eng., Kwangwoon Univ.) ;
  • Park, In-Gil (Dept. of Electronic, Shingsung Junior College) ;
  • Ryu, Ki-Won (Dept. of Electronic, Yeojoo Institude of Technology) ;
  • Lee, Young-Hie (Dept. of Electronic Materials Eng., Kwangwoon Univ.)
  • Published : 1998.07.20
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Abstract

$Ba(Mg,Ta)O_3-Ba(Co,Nb)O_3$ ceramics were prepared by the conventional mixed oxide method. The ceramics were sintered at the temperature of 1500-$1575^{\circ}C$ for 5[hr.] in air. The crystal structure was investigated by the XRD. The microstructure of the ceramics were observed by SEM. The microwave properties of dielectric resonators were investigated as a function of composition and sintering temperature. $Ba(Mg,Ta)O_3-Ba(Co,Nb)O_3$ ceramics have a structure of complex perovskite type, and have peaks of (101),(102),(201),(202) and (212). In the case of the $0.7Ba(Mg,Ta)O_3-0.3Ba(Co,Nb)O_3$ ceramic resonator, dielectric constant, quality factor and temperature coefficient of resonant frequency(TCRF, ${\tau}_l$) were a good value of 26.5, 11.500 at 10[GHz] and -1.3[ppm/$^{\circ}C$] from $25^{\circ}C$ to $60^{\circ}C$, respectively.

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