Structure and dielectric properties of yttrium-doped Ca0.28Ba0.72Nb2O6 ceramics
Structure and dielectric properties of yttrium-doped Ca0.28Ba0.72Nb2O6 ceramics
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钇掺杂Ca0.28Ba0.72Nb2O6陶瓷的结构和介电性能
DOI：
10.1016/j.jallcom.2023.169891
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发表时间：
2023
影响因子：
6.2
通讯作者：
Peirson H
中科院分区：
文献类型：
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作者：
Peirson H
在未填充的钨青铜结构铁电陶瓷Ca_（0.28）Ba_（0.72）Nb_2 O_6（CBN_（28））中掺入Y ~（3+），得到名义成分为（Ca_（0.28）Ba_（0.72））1- 3 w/2 YwNb_2 O_6 [0 ≤ w ≤ 0.05]的陶瓷。Y ~（3+）取代Ca ~（2+）/Ba ~（2+），从而形成空位，这一过程发生在A1/A2位上。这导致c晶格参数和晶胞体积的轻微减小。对于未掺杂的CBN 28，在268 ° C处存在轻微扩散的相对磁导率-温度（εr-T）峰。对于样品组合物w = 0.04和0.05，峰变得宽得多，并且峰温度显示出与弱弛豫行为一致的频率依赖性水平。对于w = 0.04和0.05的样品，极化-电场环变得更窄，对应于剩余极化值从2.4降低到0.8 µC cm−2（30 kV cm−1）。Y掺杂陶瓷在宽温度范围内表现出稳定的相对介电常数，当在1 kHz下测量时，对于w = 0.05，在36 ° C至218 ° C的中值的± 15%内变化。因此，我们认为，A位施主掺杂和异价B位掺杂的CBN具有工业标准的、温度稳定的、高温热稳定性（在-55-250 + ℃范围内，热稳定性≥ 500 ± 15%）的潜力。
An unfilled tungsten bronze-structured ferroelectric ceramic, Ca0.28Ba0.72Nb2O6(CBN28), has been doped with Y3+to produce ceramics with a nominal composition, (Ca0.28Ba0.72)1–3w/2YwNb2O6[0 ≤ w ≤ 0.05]. The substitution of Y3+for Ca2+/Ba2+, and consequent additional vacancy formation, is assumed to occur on the A1/A2 sites. This resulted in a minor reduction of the c lattice parameter, and unit cell volume. For undoped CBN28, there was a slightly diffuse relative permittivity-temperature (εr-T) peak at 268 ⁰C. The peak became much broader for sample compositions w = 0.04 and 0.05 and the peak temperature showed a level of frequency dependence consistent with weak relaxor behaviour. The polarisation-electric field loops became narrower for samples w = 0.04 and 0.05, corresponding to a reduction in remnant polarisation value, from 2.4 to 0.8 µC cm−2(30 kV cm−1). The Y doped ceramics exhibited stable relative permittivity over a wide temperature range, the variation being within± 15% of the median value from 36 ⁰C to 218 ⁰C for w = 0.05, when measured at 1 kHz. Consequently, we suggest that A site donor-doping and aliovalent B site doping of CBN holds potential for industry standard, temperature stable, high temperature dielectrics (ɛr≥ 500 ± 15% from - 55–250 + ⁰C).
准三元系SrNb 2 O 6 -NaNbO 3 -LiNbO 3 的研究
DOI：
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发表时间：
1979
期刊：
影响因子：
--
作者：
Tang Di;L. Jing;Shi Ting;Zhang Yu;Tian Jing;Li Wen
通讯作者：
Li Wen
不相称铌酸钙钡 Ca{sub 0.28}Ba{sub 0.72}Nb{sub 2}O{sub 6} (CBN28) 的热致结构变化
影响因子：
3.3
作者：
J. Schreuer;M. Burianek;M. Muehlberg
通讯作者：
M. Muehlberg
铌酸钙钡（CBN28 和 Ce:CBN28）的不相称调节。
DOI：
10.1107/s0108768111054863
发表时间：
2012
期刊：
Acta crystallographica. Section B, Structural science
影响因子：
--
作者：
H. Graetsch;C. S. Pandey;J. Schreuer;M. Burianek;M. Mühlberg
通讯作者：
M. Mühlberg