固相法制备钇掺杂的钛酸钡锶钙陶瓷的介电和热释电性能

doi:10.3724/SP.J.1077.2012.12636

无机材料学报 ›› 2013, Vol. 28 ›› Issue (4): 447-452.DOI: 10.3724/SP.J.1077.2012.12636 CSTR: 32189.14.SP.J.1077.2012.12636

固相法制备钇掺杂的钛酸钡锶钙陶瓷的介电和热释电性能

曹盛, 毛朝梁, 姚春华, 曹菲, 王根水, 董显林

(中国科学院上海硅酸盐研究所, 中国科学院无机功能材料与器件重点实验室, 上海 200050)

收稿日期:2012-10-24 出版日期:2013-04-10 网络出版日期:2013-03-20
作者简介:曹盛. E-mail: caosheng658@126.com

Dielectric and Pyroelectric Properties of Y-doped Ba_0.6Sr_0.3Ca_0.1TiO₃ Ceramics by Solid-state Reaction Technique

CAO Sheng, MAO Chao-Liang, YAO Chun-Hua, CAO Fei, WANG Gen-Shui, DONG Xian-Lin

(Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China)

Received:2012-10-24 Published:2013-04-10 Online:2013-03-20
About author:CAO Sheng (1985–), male, candidate of PhD. E-mail: caosheng658@126.com
Supported by:
Foundation item: Joint Funds of National Natural Science Foundation of China (U0937603);National Natural Sceince Foundation of China (51002173)

摘要/Abstract

摘要：

采用固相反应法制备了Y掺杂 (Ba_0.6Sr_0.3Ca_0.1)_1-_xY_xTi_0.999Mn_0.001O₃ (0≤x≤0.007)陶瓷, 重点研究了Y含量对BSCT基陶瓷的显微结构、介电性能和热释电性能的影响。结果表明: 随着Y含量的增加, BSCY_xTM陶瓷的平均晶粒尺寸逐渐减小, 介电常数、介电损耗、居里温度和热释电系数均呈现先增加后减小的趋势。当Y掺杂量为0.7mol%时, BSCY_xTM陶瓷的平均晶粒尺寸最小为3.1 μm, 且探测优值F_d较大, 最大值可达8.22×10^-5 Pa^-1/2(700 V/mm, 30℃), 高于采用溶胶-凝胶法制备的同组分陶瓷的探测优值5.91×10^-5 Pa^-1/2。

关键词: (Ba, Sr, Ca)TiO₃, 陶瓷, 介电性能, 热释电性能

Abstract:

(Ba_0.6Sr_0.3Ca_0.1)_1-_xY_xTi_0.999Mn_0.001O₃(0≤x≤0.007) ceramics were prepared by the solid-state reaction technique. The effects of Y doping on the microstructure, dielectric properties and pyroelectric properties were investigated. The average grain size decreases with the increase of Y concentration. The dielectric and pyroelectric properties measurement results show that the dielectric constant, dielectric loss, T_c and pyroelectric coefficient all initially increase and then decrease with Y concentration. And the pyroelectric figure of merit F_d can be improved by the Y doping. The specimen doped with 0.7mol%Y shows a higher maximum F_d value of 8.22×10^-5 Pa^-1/2 under 700 V/mm near 30℃ with the smallest average grain size of 3.1 μm, indicating its promising application in infrared thermal imaging arrays devices.

Key words: (Ba, Sr, Ca)TiO₃, ceramics, dielectric properties, pyroelectric properties

中图分类号:

TQ174

曹盛, 毛朝梁, 姚春华, 曹菲, 王根水, 董显林. 固相法制备钇掺杂的钛酸钡锶钙陶瓷的介电和热释电性能[J]. 无机材料学报, 2013, 28(4): 447-452.

CAO Sheng, MAO Chao-Liang, YAO Chun-Hua, CAO Fei, WANG Gen-Shui, DONG Xian-Lin. Dielectric and Pyroelectric Properties of Y-doped Ba_0.6Sr_0.3Ca_0.1TiO₃ Ceramics by Solid-state Reaction Technique[J]. Journal of Inorganic Materials, 2013, 28(4): 447-452.

图/表 7

Fig. 1 XRD patterns of BSCYxTM ceramics (0≤x≤0.007)

Fig. 2 Surface SEM images of BSCYxTM ceramics

Fig. 3 Dielectric constant and dielectric loss as a function of temperature at zero bias field for BSCYxTM ceramics (0≤x≤0.007)

Fig. 4 The dielectric constant and dielectric loss as a function of temperature under different DC bias fields for BSCYxTM ceramics (x=0.007)

Fig. 5 Pyroelectric coefficient as a function of temperature under different DC bias fields for BSCYxTM ceramics

Fig. 6 The figures of merit Fd as a function of temperature and DC bias field for BSCYxTM ceramics

Table 1 Pyroelectric properties of BSCYxTM ceramics prepared by solid-state reaction and Sol-Gel method

Material	Bias /(kV·cm^-1)	C_v /(J·cm^-3·K^-1)	p /(×10^-9, C·cm^-2·K^-1)	ε_r	tanδ	F_d/Pa^-1/2	Reference
Ba_0.67Sr_0.33TiO₃	-	2.55	350	5000	0.01	6.52×10^-5	[16]
BSCY_xTM (x=0.005)	7	2.38	269	6287	0.002	9.36×10^-5	This work
BSCY_xTM (x=0.007)	7	2.38	256	6200	0.003	8.22×10^-5	This work
(Ba_0.6Sr_0.3Ca_0.1)TiO₃+ 0.1mol%MnCO₃+0.5mol% Y₂O₃	4	3.2	~270	~8900	~0.01	2.99×10^-5	(Sol-Gel)^[8]
(Ba_0.6Sr_0.3Ca_0.1)TiO₃+ 0.1mol%MnCO₃+0.5mol% Y₂O₃	8	3.2	~300	~6000	~0.005	5.91×10^-5	(Sol-Gel)^[9]

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固相法制备钇掺杂的钛酸钡锶钙陶瓷的介电和热释电性能

Dielectric and Pyroelectric Properties of Y-doped Ba_0.6Sr_0.3Ca_0.1TiO₃ Ceramics by Solid-state Reaction Technique

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固相法制备钇掺杂的钛酸钡锶钙陶瓷的介电和热释电性能

Dielectric and Pyroelectric Properties of Y-doped Ba0.6Sr0.3Ca0.1TiO3 Ceramics by Solid-state Reaction Technique

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Dielectric and Pyroelectric Properties of Y-doped Ba_0.6Sr_0.3Ca_0.1TiO₃ Ceramics by Solid-state Reaction Technique