Crystal structure–microwave dielectric property relations in Sm(Nb1−xTax)(Ti1−yZry)O6 ceramics
Crystal structure–microwave dielectric property relations in Sm(Nb1−xTax)(Ti1−yZry)O6 ceramics
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DOI：
10.1016/j.jeurceramsoc.2005.09.062
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发表时间：
2006
影响因子：
5.7
通讯作者：
Takeshi Oishi;A. Kan;H. Ohsato;H. Ogawa
中科院分区：
文献类型：
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作者：
Takeshi Oishi;A. Kan;H. Ohsato;H. Ogawa
研究了Ta取代Nb和Zr取代Ti对Sm(Nb1−xTax)(Ti1−yZry) o6陶瓷的微波介电性能和晶体结构的影响。Sm(Nb1−xTax)TiO6（x= 0-1）陶瓷为单相，而SmTa(Ti1−yZry) o6陶瓷的固溶体极限为y=0.4。Sm(Nb1−xTax) tio6陶瓷的介电常数和谐振频率温度系数降低，而质量因子因Ta取代Nb而提高。合成smtatio6时Q·f值最大，其微波介电性能为：r=37.6；τf = 24.2 ppm /°C;和Q·f = 24541 ghz。另一方面，SmTa(Ti1−yZry) o6陶瓷的介电常数从37.6降低到28.9，品质因子从24541提高到38320GHz，组分y从0增加到0.4。谐振频率的温度系数在24.2 ~ - 11.6ppm/°C之间变化。y=0.3，介电常数为31.1，Q·f值为37481GHz，谐振频率温度系数接近于零。
The effects of the Ta substitution for Nb and the Zr substitution for Ti on the microwave dielectric properties and crystal structure of Sm(Nb1−xTax)(Ti1−yZry)O6ceramics were investigated in this study. The Sm(Nb1−xTax)TiO6(x=0–1) ceramics were single phase, whereas the limit of solid solutions for the SmTa(Ti1−yZry)O6ceramics was y=0.4. In the case of the Sm(Nb1−xTax)TiO6ceramics, the dielectric constant and the temperature coefficient of resonant frequency were decreased, whereas the quality factor was increased by the Ta substitution for Nb. The maximum Q·f value was obtained when the SmTaTiO6was synthesized, and the microwave dielectric properties are, ɛr=37.6; τf=24.2ppm/°C; and Q·f=24541GHz. On the other hand, the dielectric constants of the SmTa(Ti1−yZry)O6ceramics were decreased from 37.6 to 28.9, whereas the quality factor was increased from 24541 to 38320GHz with increasing composition y from 0 to 0.4. The temperature coefficient of resonant frequency of the ceramics varied from 24.2 to −11.6ppm/°C. A near zero temperature coefficient of resonant frequency results from the composition of y=0.3 with a dielectric constant of 31.1 and Q·f value of 37481GHz.