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Citation: Zhang Hui, Fang Liang, Yuan Run-Zhang. Structure and Dielectric Properties of A New Tantalate Ba₃TiTa₄O₁₅[J]. Acta Physico-Chimica Sinica, ;2001, 17(08): 747-749. doi: 10.3866/PKU.WHXB20010816 shu

Structure and Dielectric Properties of A New Tantalate Ba₃TiTa₄O₁₅

1.
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan　430070

Received Date: 26 December 2000
Available Online: 15 August 2001

A tantalate Ba3TiTa4O15 was synthesized by doping Ti4＋ in the binary system BaOTa2O5. The crystal structure was determined by Xray powder diffraction, and it belongs to paraelectric phase of tetra nal tungsten bronze structure at room temperature with unit cell parameters : a=1.256 27(6)nm, c=0.395 86(4)nm. Dielectric measurements showed that the phase transition of Ba3TiTa4O15 from ferroelectric to paraelectric occurred at －35 ℃, lower than that of Ba6Ti2Nb8O30. The dielectric constant of Ba3TiTa4O15 ceramic was stable at room temperature with the frequency increasing from 1 kHz to 1 MHz, while the dielectric loss was as low as 0.002. Ba3TiTa4O15 might be a suitable candidate for microwave dielectric ceramics.
- Tantalate;Tungsten bronze structure;XRD;Dielectric property
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Structure and Dielectric Properties of A New Tantalate Ba3TiTa4O15

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通讯作者: 陈斌, bchen63@163.com

Structure and Dielectric Properties of A New Tantalate Ba₃TiTa₄O₁₅