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Journal of Advanced Ceramics https://doi.org/10.26599/JAC.2024.9220893
Research Article | Open Access | Online first | Published: 20 May 2024

Lead-free (Ba,Sr)TiO3-based ceramics with superior tunable properties by the semi-solution method

Show Author's Information Yi Zhao1,  Wenfeng Liu1( ),  Dongsheng Ran1,  Yihang Jin2,  Zhiyuan Li1,  Chengzhi Zhong1,  Fanyi Kong1,  Shengtao Li1
State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China
Jiaxing Electric Power Company State Grid Zhejiang Electric Power Co., Ltd., Jiaxing 314000, China
Keywords:
microstructure, tunable properties, (Ba,Sr)TiO3 (BST) ceramics, semisolution (SS) method
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Zhao Y, Liu W, Ran D, et al. Lead-free (Ba,Sr)TiO3-based ceramics with superior tunable properties by the semi-solution method. Journal of Advanced Ceramics, 2024, https://doi.org/10.26599/JAC.2024.9220893
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Abstract Full text Electronic supplementary material About this article

High-performance dielectric tunable materials with both high dielectric tunability and low dielectric loss are urgently needed for new-generation electronic tunable devices. In the present study, a new system, (Ba0.675Sr0.325)1−xLaxTi1−xMnxO3 (x = 0.25%, 0.5%, 0.75%, and 1.0%), was designed. The acceptor dopant Mn was added to lower dielectric loss, while the donor dopant La was introduced to enhance dielectric tunability. The samples were prepared using the conventional solid-state (CS) reaction method and the semisolution (SS) method. The experimental results showed that the morphology of the ceramics was optimized by further improving the processing procedure. Dense microstructures, homogeneous grains, and uniform dopant distributions could be achieved successfully by the semisolution method. Moreover, a significant enhancement in the tunable properties was realized owing to the improved microstructure mentioned above. The optimum tunable properties occurred in the samples prepared by the semi-solution method at x = 0.75%, with a high dielectric tunability of 85.0%, a low dielectric loss of 0.0011, and an excellent figure of merit (FOM) of 773. The tunable properties of (Ba,Sr)TiO3 (BST) ceramics were even superior to those of lead-based materials, with an FOM of approximately 700. All the results suggested that the semi-solution method rendered BST ceramics more promising for applications in tunable devices.


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About this article

Lead-free (Ba,Sr)TiO3-based ceramics with superior tunable properties by the semi-solution method

Show Author's information Yi Zhao1, Wenfeng Liu1( ), Dongsheng Ran1, Yihang Jin2, Zhiyuan Li1, Chengzhi Zhong1, Fanyi Kong1, Shengtao Li1
State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China
Jiaxing Electric Power Company State Grid Zhejiang Electric Power Co., Ltd., Jiaxing 314000, China

Abstract

High-performance dielectric tunable materials with both high dielectric tunability and low dielectric loss are urgently needed for new-generation electronic tunable devices. In the present study, a new system, (Ba0.675Sr0.325)1−xLaxTi1−xMnxO3 (x = 0.25%, 0.5%, 0.75%, and 1.0%), was designed. The acceptor dopant Mn was added to lower dielectric loss, while the donor dopant La was introduced to enhance dielectric tunability. The samples were prepared using the conventional solid-state (CS) reaction method and the semisolution (SS) method. The experimental results showed that the morphology of the ceramics was optimized by further improving the processing procedure. Dense microstructures, homogeneous grains, and uniform dopant distributions could be achieved successfully by the semisolution method. Moreover, a significant enhancement in the tunable properties was realized owing to the improved microstructure mentioned above. The optimum tunable properties occurred in the samples prepared by the semi-solution method at x = 0.75%, with a high dielectric tunability of 85.0%, a low dielectric loss of 0.0011, and an excellent figure of merit (FOM) of 773. The tunable properties of (Ba,Sr)TiO3 (BST) ceramics were even superior to those of lead-based materials, with an FOM of approximately 700. All the results suggested that the semi-solution method rendered BST ceramics more promising for applications in tunable devices.

Keywords: microstructure, tunable properties, (Ba,Sr)TiO3 (BST) ceramics, semisolution (SS) method

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Received: 05 January 2024
Revised: 08 April 2024
Accepted: 08 April 2024
Published: 20 May 2024

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© The Author(s) 2024.

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This work is supported by the National Natural Science Foundation of China (No. U1966602).

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