Tailoring the microwave dielectric properties of MgNb2 O6 and Mg4Nb2O9 ceramics

被引：29
作者：
Materials and Minerals Division, Regional Research Laboratory, Trivandrum 695019, India [1 ]
机构：
[1] Materials and Minerals Division, Regional Research Laboratory
来源：
Int. J. Appl. Ceram. Technol. | 2007年 / 4卷 / 359-366期
关键词：
Ceramic materials;
D O I：
10.1111/j.1744-7402.2007.02151.x
中图分类号：
学科分类号：
摘要：
The columbites MgNb2O6, MgTa2 O6, and corundum-type Mg4Nb2 O9 ceramics were prepared by the conventional solid-state ceramic route. The structure and microstructure of the sintered samples were investigated by X-ray diffraction and scanning electron microscopic techniques. The microwave dielectric properties of the samples were measured by the resonance method in the frequency range 4-6GHz. The dielectric properties have been tailored by forming a solid solution between MgNb2O6 and MgTa2O6 and by the substitution of TiO2 for Nb2 O5 in both MgNb2O6 and Mg4 Nb2O9 ceramics. The Mg(Nb0.7 Ta1.3)O6 has εr=29, Qu × f =67800GHz, and τf=0.8ppm/°C and the MgO-(0.4)Nb2O5 -(1.5)TiO2 composition has εr=34.5, Qu × f =81300GHz, and τf=-2ppm/°C. © 2007 The American Ceramic Society.
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页码：359 / 366
页数：7
相关论文
共 36 条
[1]  
Wersing W., High Frequency Ceramic Dielectric and Their Application for Microwave Components, Electronic Ceramics, pp. 67-119, (1991)
[2]  
Tamura H., Konoike T., Sakabe Y., Wakino K., Improved High-Q Dielectric Resonators With Complex Perovskite Structure, J. Am. Ceram. Soc, 67, (1984)
[3]  
Kawashima S., Nishida M., Ueda I., Ouchi H., Ba(Zn<sub>1/3</sub>Ta <sub>2/3</sub>) O<sub>3</sub> Ceramics With Low Dielectric Loss at Microwave Frequencies, J. Am. Ceram. Soc, 66, pp. 233-241, (1983)
[4]  
Matsumoto K., Hiuga T., Takada K., Ichimura H., Ba(M<sub>1/3</sub>Ta<sub>2/3</sub>)O<sub>3</sub> Ceramics With Ultra-Low Loss at Microwave Frequencies, IEEE Trans. Ultrason. Ferroelectr. Frequency Control, 33, pp. 118-121, (1986)
[5]  
Wakino K., Minai Y., Tamura H., Microwave Characteristics of (Zr, Sn)TiO<sub>4</sub> and BaO-PbO-Nd<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub> Dielectric Resonators, J. Am. Ceram. Soc., 67, pp. 278-280, (1984)
[6]  
Ogawa H., Kan A., Ishihara S., Higashida Y., Crystal Structure of Corundum Type Mg<sub>4</sub>(Nb<sub>2-x</sub> Ta<sub>x</sub>)O<sub>9</sub> Microwave Dielectric Ceramics With Low Dielectric Loss, J. Eur. Ceram. Soc., 23, pp. 2485-2488, (2003)
[7]  
Ferreia V.M., Baptista J.L., Preparation and Microwave Dielectric Properties of Pure and Doped Magnesium Titanate Ceramics, Mater. Res. Bull., 29, pp. 1017-1023, (1994)
[8]  
Ananta S., Effects of Starting Precursor and Calcinations Condition on the Phase Formation Characteristics of Mg<sub>4</sub>Nb<sub>2</sub> O<sub>9</sub> Powders, Mater. Lett., 58, pp. 2834-2841, (2004)
[9]  
Maeda M., Yamamura T., Ikeda T., Dielectric Characteristics of Several Complex Oxide Ceramics at Microwave Frequencies, Jpn. J. Appl. Phys., 26, SUPPL., pp. 76-79, (1987)
[10]  
Lee H.-J., Kim I.-T., Hong K.-S., Dielectric Properties of AB<sub>2</sub>O<sub>6</sub> Compounds at Microwave Frequencies (A=Ca, Mg, Mn, Co, Ni, Zn and B=Nb, Ta), Jpn. J. Appl. Phys., 36, PART 2, (1997)
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