Preformed and in-situ spinel-containing alumina castables: Effect of in situ ZnAl2O4 formation

IF 2.3 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

International Journal of Applied Ceramic Technology Pub Date : 2025-08-12 DOI:10.1111/ijac.70048

Satyam Kumar, Ritwik Sarkar

{"title":"Preformed and in-situ spinel-containing alumina castables: Effect of in situ ZnAl2O4 formation","authors":"Satyam Kumar, Ritwik Sarkar","doi":"10.1111/ijac.70048","DOIUrl":null,"url":null,"abstract":"The effect of in situ ZnAl2O4 formation by the addition of ZnO on the properties of preformed and in situ MgAl2O4 spinel-containing cement-bonded alumina castable has been investigated. 2 wt.% ZnO was added in the 10 and 20 wt.% spinel in preformed and 2.8 and 5.6 wt.% MgO in in situ spinel-containing alumina castables, respectively. Calcium aluminate cement was employed as a binder, and the flow consistency of the castables was adjusted using the Dinger–Funk model with distribution coefficients of.21 and.29. All the samples were assessed for densification and strength studies after heat treatment at different temperatures. 1550°C fired samples were evaluated for phase development, microstructure with EDAX, and slag corrosion study. ZnO-containing alumina spinel castables were finally compared against the compositions without additives. The results revealed that the formation of ZnAl2O4 has significantly improved the densification, mechanical, thermomechanical, and corrosion properties. Microstructural studies show that the in situ formed ZnAl2O4 phase makes a solid solution with the spinel (MgAl2O4) phase in the composition.","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 6","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Applied Ceramic Technology","FirstCategoryId":"88","ListUrlMain":"https://ceramics.onlinelibrary.wiley.com/doi/10.1111/ijac.70048","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}

引用次数: 0

Abstract

The effect of in situ ZnAl₂O₄ formation by the addition of ZnO on the properties of preformed and in situ MgAl₂O₄ spinel-containing cement-bonded alumina castable has been investigated. 2 wt.% ZnO was added in the 10 and 20 wt.% spinel in preformed and 2.8 and 5.6 wt.% MgO in in situ spinel-containing alumina castables, respectively. Calcium aluminate cement was employed as a binder, and the flow consistency of the castables was adjusted using the Dinger–Funk model with distribution coefficients of.21 and.29. All the samples were assessed for densification and strength studies after heat treatment at different temperatures. 1550°C fired samples were evaluated for phase development, microstructure with EDAX, and slag corrosion study. ZnO-containing alumina spinel castables were finally compared against the compositions without additives. The results revealed that the formation of ZnAl₂O₄ has significantly improved the densification, mechanical, thermomechanical, and corrosion properties. Microstructural studies show that the in situ formed ZnAl₂O₄ phase makes a solid solution with the spinel (MgAl₂O₄) phase in the composition.

Abstract Image

查看原文本刊更多论文

预成形和原位含尖晶石氧化铝浇注料：原位形成ZnAl2O4的影响

研究了ZnO原位生成ZnAl2O4对预制型和原位含尖晶石MgAl2O4水泥结合氧化铝浇注料性能的影响。在预铸尖晶石中添加2 wt.%的ZnO，在含尖晶石的原位氧化铝浇注料中添加2.8 wt.%的MgO，分别为20 wt.%和10 wt.%。采用铝酸钙水泥作为粘结剂，采用分布系数为的Dinger-Funk模型调节浇注料的流动稠度。21 and.29。所有样品在不同温度下热处理后进行了密度和强度研究。1550°C烧制的样品进行了相发育、EDAX显微组织和渣腐蚀研究。最后对含锌铝尖晶石浇注料与未添加添加剂的浇注料进行了比较。结果表明，ZnAl2O4的形成显著改善了合金的致密化性能、力学性能、热力学性能和腐蚀性能。显微组织研究表明，原位形成的ZnAl2O4相与成分中的尖晶石相（MgAl2O4）形成固溶体。

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

International Journal of Applied Ceramic Technology 工程技术-材料科学：硅酸盐

CiteScore

3.90

自引率

9.50%

发文量

280

审稿时长

4.5 months

期刊介绍： The International Journal of Applied Ceramic Technology publishes cutting edge applied research and development work focused on commercialization of engineered ceramics, products and processes. The publication also explores the barriers to commercialization, design and testing, environmental health issues, international standardization activities, databases, and cost models. Designed to get high quality information to end-users quickly, the peer process is led by an editorial board of experts from industry, government, and universities. Each issue focuses on a high-interest, high-impact topic plus includes a range of papers detailing applications of ceramics. Papers on all aspects of applied ceramics are welcome including those in the following areas: Nanotechnology applications; Ceramic Armor; Ceramic and Technology for Energy Applications (e.g., Fuel Cells, Batteries, Solar, Thermoelectric, and HT Superconductors); Ceramic Matrix Composites; Functional Materials; Thermal and Environmental Barrier Coatings; Bioceramic Applications; Green Manufacturing; Ceramic Processing; Glass Technology; Fiber optics; Ceramics in Environmental Applications; Ceramics in Electronic, Photonic and Magnetic Applications;