Microwave Dielectric Properties of Corundum-Structured (Mg4-xMx)(Nb2-yAy)O9 (M=Mn, Co, and Zn, A=Ta and Sb) Ceramics

2007 Sixteenth IEEE International Symposium on the Applications of Ferroelectrics Pub Date : 2007-12-04 DOI:10.1109/ISAF.2007.4393316

A. Kan, H. Ogawa

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引用次数: 3

Abstract

The (Mg₄ _-xM_x)(Nb_2-yA_y)O₉ (M=Mn, Co, and Zn, A=Ta and Sb) compound with corundum structure were prepared and the microwave dielectric properties, crystal structure and covalency of cation-oxygen bonds of the compounds were investigated in this study. The global instability index (GII) of (Mg_4-xM_x)Nb₂O₉ compounds was higher than that of Mg₄(Nb_2-yA_y)O₉ compounds and the GIl values of (Mg_4-xM_x)Nb₂O₉ compounds increased with increasing the composition x. From the calculation of cation-oxygen bonds, it was found covalency of M-O bond in the (Mg_4-xM_x)Nb₂O₉ compounds decreased, depending on the composition. The dielectric constant of the compounds ranged from 11 to 16 by the M substitutions for Mg, whereas the quality factor (Q f) drastically decreased form 210000 to 5000 GHz. On the other hand, the A substitution for Nb enhanced the increase in the Q f value of the compounds; the highest value was 347000 GHz.

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刚玉结构(Mg4-xMx)(Nb2-yAy)O9 (M=Mn, Co, and Zn, A=Ta和Sb)陶瓷的微波介电性能

制备了刚玉结构的(Mg4 -xMx)(Nb2-yAy)O9 (M=Mn, Co, Zn, A=Ta和Sb)化合物，并对其微波介电性能、晶体结构和阳离子-氧键共价进行了研究。(Mg4- xmx)Nb2O9化合物的全局不稳定性指数(GII)高于Mg4(Nb2-yAy)O9化合物，(Mg4- xmx)Nb2O9化合物的GIl值随着组分x的增加而增加。从阳离子氧键的计算中发现，(Mg4- xmx)Nb2O9化合物的M-O键共价随组分的不同而降低。通过M取代Mg，化合物的介电常数在11 ~ 16之间，而品质因子(qf)从210000 GHz急剧下降到5000 GHz。另一方面，A取代Nb增强了化合物的Q f值的增加;最高值为347000 GHz。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2007 Sixteenth IEEE International Symposium on the Applications of Ferroelectrics

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