Influence of oxygen vacancies on dielectric properties and phase transition of rutile-type (TiVCrNbTa)O2

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialia Pub Date : 2025-02-21 DOI:10.1016/j.mtla.2025.102380

Jian Guo , Siwen Yu , Chengyi Chu , Jianguo Pan , Peiling Ke , Gongjun Zhang , Aihua Sun

{"title":"Influence of oxygen vacancies on dielectric properties and phase transition of rutile-type (TiVCrNbTa)O2","authors":"Jian Guo , Siwen Yu , Chengyi Chu , Jianguo Pan , Peiling Ke , Gongjun Zhang , Aihua Sun","doi":"10.1016/j.mtla.2025.102380","DOIUrl":null,"url":null,"abstract":"<div><div>High-entropy ceramics (HECs) are a novel category of multicomponent ceramics featuring significant atomic-scale disorder. This unique structure preserves the intrinsic properties of individual elements while enabling their interactions to generate intriguing phenomena. In this study, single-phase and dual-phase (TiVCrNbTa)O<sub>2</sub> high-entropy oxide ceramics (HEOs) were fabricated via a straightforward sintering process. The synthesis of single-phase HEOs with a pure rutile structure was achieved at 1400 °C by altering the sintering atmosphere from air to argon. The single-phase (TiVCrNbTa)O<sub>2</sub> HEOs exhibited remarkable dielectric properties, with dielectric constants (∼5) and dielectric loss attain the order of 10<sup>–3</sup> in the frequency range of 2–4 GHz. The dual-phase (TiVCrNbTa)O<sub>2</sub> HEOs also have approximate dielectric properties and exhibit excellent thermal stability from room temperature to 1200 °C under the air atmosphere. A new single-phase and dual-phase HEOs was successfully synthesized, and their dielectric properties as well as thermal stability meet the requirements of wave-transparent materials.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"39 ","pages":"Article 102380"},"PeriodicalIF":3.0000,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materialia","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S258915292500047X","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

High-entropy ceramics (HECs) are a novel category of multicomponent ceramics featuring significant atomic-scale disorder. This unique structure preserves the intrinsic properties of individual elements while enabling their interactions to generate intriguing phenomena. In this study, single-phase and dual-phase (TiVCrNbTa)O₂ high-entropy oxide ceramics (HEOs) were fabricated via a straightforward sintering process. The synthesis of single-phase HEOs with a pure rutile structure was achieved at 1400 °C by altering the sintering atmosphere from air to argon. The single-phase (TiVCrNbTa)O₂ HEOs exhibited remarkable dielectric properties, with dielectric constants (∼5) and dielectric loss attain the order of 10^–3 in the frequency range of 2–4 GHz. The dual-phase (TiVCrNbTa)O₂ HEOs also have approximate dielectric properties and exhibit excellent thermal stability from room temperature to 1200 °C under the air atmosphere. A new single-phase and dual-phase HEOs was successfully synthesized, and their dielectric properties as well as thermal stability meet the requirements of wave-transparent materials.

Abstract Image

查看原文本刊更多论文

高熵陶瓷（HECs）是一种新型的多组分陶瓷，具有明显的原子尺度无序性。这种独特的结构既保留了单个元素的固有特性，又能使它们之间的相互作用产生有趣的现象。本研究通过直接烧结工艺制备了单相和双相（TiVCrNbTa）O2 高熵氧化物陶瓷（HEOs）。通过将烧结气氛从空气改为氩气，在 1400 ℃ 下合成了具有纯金红石结构的单相 HEO。单相（TiVCrNbTa）O2 HEOs 表现出显著的介电性能，在 2-4 GHz 频率范围内介电常数（∼5）和介电损耗达到 10-3 量级。双相（TiVCrNbTa）O2 HEOs 也具有近似的介电性能，并且在空气环境下从室温到 1200 ℃ 都表现出优异的热稳定性。成功合成的新型单相和双相 HEOs 的介电性能和热稳定性均符合透波材料的要求。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Materialia MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.40

自引率

2.90%

发文量

345

审稿时长

36 days

期刊介绍： Materialia is a multidisciplinary journal of materials science and engineering that publishes original peer-reviewed research articles. Articles in Materialia advance the understanding of the relationship between processing, structure, property, and function of materials. Materialia publishes full-length research articles, review articles, and letters (short communications). In addition to receiving direct submissions, Materialia also accepts transfers from Acta Materialia, Inc. partner journals. Materialia offers authors the choice to publish on an open access model (with author fee), or on a subscription model (with no author fee).