通过冷烧结预处理提高 BaTiO3 的致密性和介电特性

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2024-10-29 DOI:10.1016/j.jeurceramsoc.2024.117036

Atta Ullah, Haribabu Palneedi, Sang-Chae Jeon

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引用次数: 0

摘要

冷烧结工艺（CSP）是在随后的传统烧结（TS）之前对 BaTiO3 进行致密化的一种预处理方法。对两种不同的加工路线进行了比较，即有无 CSP 预处理（CSP + TS 或 TS）。在 225 °C 下进行 CSP 并随后在 1000 °C 下进行 TS 处理后，获得了较高的相对密度（如 96.86 % TD），平均晶粒大小为 1.52 μm，而未进行 CSP 预处理的样品的相应结果为 60.56 % TD 和 0.29 μm。在 900 ℃ 至 1200 ℃ 的宽温度范围内，这种显著的改善是显而易见的，在 1 kHz 至 1 MHz 的频率范围内，TS 样品的介电性能优于 TS 样品。性能的提高归功于次生相的减少、相对密度的提高，以及通过改变加工温度实现的最佳晶粒尺寸，从而凸显了 CSP 预处理的优势。

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Enhanced densification and dielectric properties of BaTiO3 through a cold-sintering pre-treatment

The cold sintering process (CSP) is utilized as a pre-treatment to densify BaTiO₃ before subsequent conventional sintering (TS). A comparison between two different processing routes, with or without the CSP pre-treatment (CSP + TS or TS). After CSP at 225 °C and subsequent TS at 1000 °C, a high relative density (e.g., 96.86 % TD) was obtained with an average grain size of 1.52 μm, while corresponding outcomes of 60.56 % TD and 0.29 μm were obtained in the sample without the CSP pre-treatment. This dramatic improvement was evident in a wide temperature range from 900 to 1200 °C, leading to superior dielectric properties to the TS samples in a frequency range from 1 kHz to 1 MHz. The enhanced performance is attributable to reduced secondary phases, an enhanced relative density, and the optimal grain size realized by modifying the processing temperatures, highlighting the benefits of the CSP pre-treatment.

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.