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논문 기본 정보

자료유형
학술저널
저자정보
Yeon, Deuk-Ho (Department of Materials Science and Engineering, Yonsei University) Han, Chan-Su (Department of Materials Science and Engineering, Yonsei University) Key, Sung-Hoon (Department of Materials Science and Engineering, Yonsei University) Kim, Hyo-Eun (Department of Materials Science and Engineering, Yonsei University) Kang, Jong-Yun (Thin Film Materials Research Center, Korea Institute of Science and Technology) Cho, Yong-Soo (Department of Materials Science and Engineering, Yonsei University)
저널정보
한국재료학회 한국재료학회지 한국재료학회지 제19권 제10호
발행연도
2009.1
수록면
550 - 554 (5page)

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Unreported dielectrics based on the binary system of MgO-SiO$_2$ were investigated as potential candidates for microwave dielectric applications, particularly those demanding a high fired density and high quality factors. Extensive dielectric compositions having different molar ratios of MgO to SiO$_2$, such as 2:1, 3:1, 4:1, and 5:1, were prepared by conventional solid state reactions between MgO and SiO$_2$. 1 mol% of V$_2$O$_5$ was added to aid sintering for improved densification. The dielectric compositions were found to consist of two distinguishable phases of Mg$_2$SiO$_4$ and MgO beyond the 2:1 compositional ratio, which determined the final physical and dielectric properties of the corresponding composite samples. The increase of the ratio of MgO to SiO$_2$ tended to improve fired density and quality factor (Q) without increasing grain size. As a promising composition, the 5MgO.SiO$_2$ sample sintered at 1400 $^{\circ}C$ exhibited a low dielectric constant of 7.9 and a high Q $\times$ f (frequency) value of $\sim$99,600 at 13.7 GHz.

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