Crystal structures, dielectric properties and ferroelectricity in stuffed tridymite-type BaAl(2-2x)(Zn0.5Si0.5)(2x)O-4 solid solutions

Li Jie; Lan Xue-Kai; Song Xiao-Qiang; Lu Wen-Zhong; Wang Xiao-Hong; Shi Feng; Lei Wen

首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Crystal structures, dielectric properties and ferroelectricity in stuffed tridymite-type BaAl(2-2x)(Zn0.5Si0.5)(2x)O-4 solid solutions

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Crystal structures, dielectric properties and ferroelectricity in stuffed tridymite-type BaAl(2-2x)(Zn0.5Si0.5)(2x)O-4 solid solutions

机译：填充型曲线型BaAl（2-2x）（Zn0.5Si0.5）（2x）O-4固溶体中的晶体结构，介电性能和铁电性

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BaAl(2-2x)(Zn0.5Si0.5)(2x)O-4 (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0) solid solutions with weak ferroelectricity were prepared using a conventional solid-state reaction method. Zn atoms preferentially occupied the 6c-Wyckoff site of Al1 and the 2b-Wyckoff site of Al4, whereas Si atoms filled the 6c-Wyckoff site of Al2 and the 2b-Wyckoff site of Al3. As such, the cell volume shrank abnormally as the number of larger [Zn0.5Si0.5](3+) compared to Al3+ increased. There were two anomalous peaks in the dielectric constant. One peak at low temperature represented a second-order ferroelectric transition. Relaxor-like behaviour and a stable dielectric constant against temperature from -50 degrees C to 400 degrees C were observed at x = 0.4. This result was attributed to disorder in the 2b-Wyckoff site Al/(Zn0.5Si0.5) and distortion in the tetrahedron.

机译：使用常规的固态反应方法制备BaAl（2-2x）（2x）O-4（x = 0,0.2,0.4,0.6,0.8,10.2,0.4,0.6,0.8,1.0）固溶溶液。 Zn原子优先占据Al1的6C-Wyckoff站点和Al4的2B-Wyckoff遗址，而Si原子填充了Al2的6C-Wyckoff遗址和Al3的2B-Wyckoff遗址。这样，与Al3 +增加相比，细胞体积异常，随着较大的[Zn0.5Si0.5]（3+）的数量而异常。介电常数有两个异常峰。低温下的一个峰值表示二阶铁电过渡。在X = 0.4处观察到X = 0.4的放松类似的行为和稳定的温度抵抗-50℃至400℃的温度。该结果归因于2B-Wyckoff遗址Al /（Zn0.5si0.5）和四面体中的变形。

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《Dalton transactions: An international journal of inorganic chemistry》 |2019年第11期|共10页
作者
Li Jie; Lan Xue-Kai; Song Xiao-Qiang; Lu Wen-Zhong; Wang Xiao-Hong; Shi Feng; Lei Wen;
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Huazhong Univ Sci &

Technol Sch Opt &

Elect Informat Wuhan 430074 Hubei Peoples R China;

Huazhong Univ Sci &

Technol Sch Opt &

Elect Informat Wuhan 430074 Hubei Peoples R China;

Huazhong Univ Sci &

Technol Sch Opt &

Elect Informat Wuhan 430074 Hubei Peoples R China;

Huazhong Univ Sci &

Technol Sch Opt &

Elect Informat Wuhan 430074 Hubei Peoples R China;

Huazhong Univ Sci &

Technol Sch Opt &

Elect Informat Wuhan 430074 Hubei Peoples R China;

Shandong Univ Sci &

Technol Sch Mat Sci &

Engn Qingdao 266590 Peoples R China;

Huazhong Univ Sci &

Technol Sch Opt &

Elect Informat Wuhan 430074 Hubei Peoples R China;

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机译：填充型曲线型BaAl（2-2x）（Zn0.5Si0.5）（2x）O-4固溶体中的晶体结构，介电性能和铁电性
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Crystal structures, dielectric properties and ferroelectricity in stuffed tridymite-type BaAl(2-2x)(Zn0.5Si0.5)(2x)O-4 solid solutions

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