Influence of M (M=Zn and Ni) Substitution for Cu on Microwave Dielectric Characteristics of Yb2Ba(Cu1-xMx)O5 Solid Solutions
Influence of M (M=Zn and Ni) Substitution for Cu on Microwave Dielectric Characteristics of Yb2Ba(Cu1-xMx)O5 Solid Solutions
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DOI：
10.1143/jjap.40.5774
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发表时间：
2001-09
影响因子：
1.5
通讯作者：
A. Kan;H. Ogawa;H. Ohsato;Junji Sugishita
中科院分区：
文献类型：
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作者：
A. Kan;H. Ogawa;H. Ohsato;Junji Sugishita
研究了M（M=Zn和Ni）替代Cu对Yb 2Ba（Cu 1-xMx）O 5固溶体微波介电性能和晶体结构的影响。Yb_2Ba（Cu_（1-x）Ni_x）O_5（x=0 ~ 1）固溶体为单相，而Yb_2Ba（Cu_（1-x）Zn_x）O_5固溶体的极限为x=0.75。固溶体的形成是由于Yb 3+和M2+离子的离子半径不同所致。Yb_2Ba（Cu_（1-x）Zn_x）O_5（x=0 ~ 0.75）固溶体的εr值随x的变化范围为7.9 ~ 14.9。这种变化被解释为在Yb 2 O 11多面体的体积增加引起的底平面与M取代Cu的膨胀。此外，M取代Cu后，固溶体的Q·f值显著提高，Zn和Ni取代Cu后，固溶体的Q·f值分别达到52815和50042 GHz。
The effects of M (M=Zn and Ni) substitution for Cu on the microwave dielectric properties and the crystal structure of Yb2Ba(Cu1-xMx)O5 solid solutions were investigated. Yb2Ba(Cu1-xNix)O5 (x=0 to 1) solid solutions are a single phase, whereas the limit of Yb2Ba(Cu1-xZnx)O5 solid solutions is x=0.75. The formation of the solid solutions is caused by the difference of ionic radii between Yb3+ and M2+ ions. The εr values of Yb2Ba(Cu1-xZnx)O5 (x=0 to 0.75) solid solutions vary from 7.9 to 14.9, depending on the composition x. This variation is interpreted as an increase in the volume of the Yb2O11 polyhedron induced by an expansion of the bottom plane with M substitution for Cu. Moreover, the Q·f values of the solid solutions are extremely improved by M substitution for Cu, and the maximum Q·f values with Zn and Ni substitutions for Cu are 52815 and 50042 GHz, respectively.