Chemical synthesis of cubic bismuth zinc niobate ceramic and its dielectric properties

被引：0

作者：

Yang, H. B. ^{[1
]}

Lin, Y. ^{[1
]}

Zhu, J. F. ^{[1
]}

Wang, F. ^{[1
]}

Luo, H. J. ^{[2
]}

机构：

[1] Shaanxi Univ Sci & Technol, Sch Mat Sci & Technol, Xian 710021, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China

来源：

MATERIALS TECHNOLOGY | 2009年 / 24卷 / 04期

关键词：

(Bi3/2Zn1/2)(Zn1/2Nb3/2)O7; (K0.5Na0.5)NbO3; Polymerised complex method; Dielectric properties; PYROCHLORE; RELAXATION; ROUTE;

D O I：

10.1179/175355509X387165

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Powders of (Bi(3/2)Zn(1/2))(Zn(1/2)Nb(3/2))O(7) (BZN) were prepared by the polymerised complex method, based on the Pechini type reaction route. The crystallisation process of BZN during the calcination of an amorphous precursor was observed, using thermogravimetric and differential scanning calorimetric analysis and X-ray powder diffraction. After calcination the powders were ball milled, pressed into pellets and sintered at 950 degrees C, which is lower than the sintered temperature of the conventional solid state method. Using this procedure we achieved relatively high density and very homogeneous BZN ceramics. The dielectric properties of the ceramics were investigated. The results showed the as prepared BZN ceramic possesses relaxation at lower temperatures less than -100 degrees C. The peaks of the dielectric constant in conjunction with the peaks of dielectric loss shift to lower temperatures with frequency decreasing, revealing that the active energy became higher according to Arrhenius law.

引用

页码：209 / 212

页数：4

共 15 条

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