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Your search keyword '"Gao, Rongli"' showing total 382 results
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382 results on '"Gao, Rongli"'

2. High-entropy perovskite ceramics: Advances in structure and properties

Author

Ding Yiwen, Ren Keju, Chen Chen, Huan Li, Gao Rongli, Deng Xiaoling, Chen Gang, Cai Wei, Fu Chunlin, Wang Zhenhua, and Lei Xiang

Subjects
high-entropy ceramics, perovskite oxide, structure, properties, Clay industries. Ceramics. Glass, TP785-869
Abstract

High-entropy ceramic materials usually refer to the multi-principal solid solution formed by 5 or more ceramic components. Due to its novel “high-entropy effect” and excellent performance, it has become one of the research hotspots in the field of ceramics in recent years. As the research system of high-entropy ceramics has gradually expanded from the initial rock salt oxides (Mg-Ni-Co-Cu-Zn)O to fluorite oxides, perovskite oxides, spinel oxides, borides, carbides and silicates, its special mechanical, electrical, magnetic and energy storage properties have been continuously discovered. Based on the basic principle of high-entropy materials, this paper mainly introduces the prominent perovskite-type oxide high-entropy ceramics in recent years from the perspective of ceramic structure and properties, and predicts the development trend of high-entropy perovskite-type ceramics in the next few years.

Published
2024
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34. Study on the magnetoelectric coupling properties of Mn0.5Zn0.5Fe2O4-PbZr Ti1-O3 multiferroic fluids with different polarization intensities

Author

Chen, Chen, primary, Mou, Haowen, additional, Zhu, Youlun, additional, Ao, Hong, additional, Meng, Gang, additional, Ding, Yiwen, additional, Gao, Rongli, additional, Deng, Xiaoling, additional, Cai, Wei, additional, Wang, Zhenhua, additional, Fu, Chunlin, additional, Lei, Xiang, additional, and Chen, Gang, additional

Published
2024
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40. Effect of sintering temperatures on the magnetoelectric properties of Bi0.78La0.08Sm0.14Fe0.85Ti0.15O3 ceramics

Author

Ao Hong, Wu Heng, Li Wenchuan, Lan Mengshuang, Zeng Zhixin, Zhang Qin, Gao Rongli, Deng Xiaoling, Chen Gang, Fu Chunlin, Wang Zhenhua, Lei Xiang, and Cai Wei

Subjects
multiferroics, doped bifeo3, ferroelectric, magnetic and dielectric properties, Clay industries. Ceramics. Glass, TP785-869
Abstract

Multiferroic materials attracted much attention because of magnetoelectric (ME) coupling effect. Herein, a typical single-phase multiferroic BiFeO3 (BFO) was co-doped at A and B sites by solid-state method, and Bi0.78La0.08Sm0.14Fe0.85Ti0.15O3 (BLSFTO) ceramics were prepared at different sintering temperatures (940, 960, 980 and, 1000°C). The effects of sintering temperature on the microstructure, morphology, dielectric, ferroelectric and magnetic properties were systematically studied. The remanent polarization (Pr) and coercive field (Ec) of the BLSFTO ceramics show a non-linear change with sintering temperature. The remanent polarization reaches maximum (0.0560 μC/cm2) in the sample sintered at 1000°C, whereas the maximum Ec of 1.32 kV/cm was obtained in the specimen sintered at 940°C. The remanent magnetization (Mr) increases with the increase of sintering temperature, while change of the saturation magnetization with sintering temperature is negligible. When BLSFTO specimen is sintered at 1000°C, Mr reaches the maximal value of 0.1344 emu/g.

Published
2022
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41. Influence of calcination temperature on structure and multiferroic properties of barium ferrite ceramics

Author

Zeng Zhixin, Zhang Qin, Wu Heng, Lan Mengshuang, Ao Hong, Li Wenchuan, Zhou Chuang, He Jizhuang, Xing Shulin, Deng Xiaoling, and Gao Rongli

Subjects
barium ferrite, sol-gel method, calcination temperature, multiferroic properties, Clay industries. Ceramics. Glass, TP785-869
Abstract

In this paper, barium ferrite powders were synthesized by sol-gel method, calcined at different temperatures, and on this basis the corresponding ceramics were prepared. The effects of calcination temperature on the structure, magnetic, dielectric and multiferroic properties of BaFe12O19 ceramics were studied. XRD results confirmed similarity between powders and ceramics, where dominant phase is BaFe12O19 and a small amount of an apparent BaFe2O4 impurity phase was formed at lower calcination temperature. The impurity BaFe2O4 phase is the main reason for decreasing powder magnetization. The maximum dielectric constant of 100 (at 10 kHz) and maximum remanent polarization, remanent magnetization and saturation magnetization of 0.46 μC/cm2, 47.37 emu/g and 79.96 emu/g, respectively, were obtained in the barium ferrite ceramics prepared from the powder calcined at 1100°C. This research could be the basis for the study of single-phase multiferroic materials and the development of multi-order electronic devices.

Published
2022
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48. Effect of sintering temperature on magnetoelectric coupling in 0.2Ni0.9Zn0.1Fe2O4-0.8Ba0.9Sr0.1TiO3 composite ceramics

Author

Yu Juan, Bai Lang, and Gao Rongli

Subjects
nzfo-bsto, composite ceramics, structure, dielectric properties, magnetoelectric coupling, Clay industries. Ceramics. Glass, TP785-869
Abstract

Magnetoelectric composites have attracted much attention due to their intriguing physical properties and potential applications. They might have strong magnetoelectric coupling effect above room temperature, but it mainly depends on the sintering schedule. In this paper, 0.2Ni0.9Zn0.1Fe2O4-0.8Ba0.9Sr0.1TiO3 (NZFO-BSTO) composite ceramics were prepared by conventional solid sintering method. Effects of the sintering temperature (1050, 1100, 1150 and 1200°C) on the microstructure, dielectric and multiferroic properties were investigated in detail. XRD results confirm that the prepared ceramics show bi-phase structure, which can be indexed as NZFO and BSTO. No obvious impurity phase was observed when the sintering temperature is less than 1200°C, indicating that there is no apparent chemical reaction occuring at the magnetic and ferroelectric interface. All of the samples show relatively dense and uniform structure. The mean grain size of the composites increases from 220 to 650 nm when the sintering temperature increases from 1050°C to 1200°C. The sample ST-1100 has the best frequency stability of dielectric constant, while it presents the smallest dielectric loss. All specimens present two dielectric peaks, the first one is attributed to the diffuse phase transition of BSTO, while another one generated at higher temperature corresponds to the relaxation polarization. The sample ST-1100 shows excellent ferroelectric properties, the value of remnant polarization is about 5.1 μC/cm2 and the coercive electric field value is ~20 kV/cm. The ceramics ST-1050 and ST-1200 show larger leakage current. All samples show paramagnetic behaviour with small remnant magnetization (~0.3 emu/g) and coercive magnetic field (~30Oe). The sample ST-1100 has maximum magnetoelectric coupling coefficient of 9.6mV/cm•Oe when the magnetic field is near 1100Oe.

Published
2020
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