{"title":"NiMn<sub>2</sub>O<sub>4</sub> Ceramic with Bi<sub>2</sub>O<sub>3</sub> as Ablating Aid with Laser Melting Deposition.","authors":"Wei Ren, Xianhai Liu, Shujian Ding, Xiang Weng, Guanghui Liu, Weili Wang, Yanhan Yang","doi":"10.3390/ma18112571","DOIUrl":null,"url":null,"abstract":"<p><p>NiMn<sub>2</sub>O<sub>4</sub> thermosensitive ceramics using Bi<sub>2</sub>O<sub>3</sub> as a low-temperature ablating aid were prepared by laser melting deposition. Analyzing the structural, morphological, and electrical properties of the ceramics revealed important roles of Bi<sub>2</sub>O<sub>3</sub>. The room-temperature resistance decreased gradually with the increasing of the Bi<sub>2</sub>O<sub>3</sub> content, the thermal constant of the ceramics varied from 2870.1 to 3853.2 K, and the activation energy varied from 0.2473 to 0.3320 eV. Furthermore, the alleviation of the aging issue was attributed to the grain growth and the densification of the ceramics due to the addition of Bi<sub>2</sub>O<sub>3</sub> and the corresponding cationic redistribution. As a result, an optimized resistance drifting (∆R/R = 5.72%) of the ceramic was obtained with the addition of Bi<sub>2</sub>O<sub>3</sub>.</p>","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 11","pages":""},"PeriodicalIF":3.1000,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12156143/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.3390/ma18112571","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
NiMn2O4 thermosensitive ceramics using Bi2O3 as a low-temperature ablating aid were prepared by laser melting deposition. Analyzing the structural, morphological, and electrical properties of the ceramics revealed important roles of Bi2O3. The room-temperature resistance decreased gradually with the increasing of the Bi2O3 content, the thermal constant of the ceramics varied from 2870.1 to 3853.2 K, and the activation energy varied from 0.2473 to 0.3320 eV. Furthermore, the alleviation of the aging issue was attributed to the grain growth and the densification of the ceramics due to the addition of Bi2O3 and the corresponding cationic redistribution. As a result, an optimized resistance drifting (∆R/R = 5.72%) of the ceramic was obtained with the addition of Bi2O3.
期刊介绍：
Materials (ISSN 1996-1944) is an open access journal of related scientific research and technology development. It publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Materials provides a forum for publishing papers which advance the in-depth understanding of the relationship between the structure, the properties or the functions of all kinds of materials. Chemical syntheses, chemical structures and mechanical, chemical, electronic, magnetic and optical properties and various applications will be considered.
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