{"title":"Preparation and properties of ZrO2-strengthened porous mullite insulation materials using Y2O3 additive","authors":"Wang-zhi Yu, Yi-hong Shi, Ping Liu, Yong-wan Wu, Cheng-hao Song, Xian-gong Deng, Xiang Ding, Song-lin Ran, Yi Zhang, Hai-jun Zhang, Hai-liang Deng","doi":"10.1007/s42243-024-01229-y","DOIUrl":null,"url":null,"abstract":"<p>ZrO<sub>2</sub>-strengthened porous mullite insulation materials were prepared by foaming technology utilizing ZrSiO<sub>4</sub> and Al<sub>2</sub>O<sub>3</sub> as primary materials and Y<sub>2</sub>O<sub>3</sub> as an additive. The effects of Y<sub>2</sub>O<sub>3</sub> contents on the phase composition, microstructure, mechanical properties, and heat conductivity of the porous mullite insulation materials were investigated. A suitable Y<sub>2</sub>O<sub>3</sub> content could promote phase transition of monoclinic ZrO<sub>2</sub> (m-ZrO<sub>2</sub>) to tetragonal ZrO<sub>2</sub> (t-ZrO<sub>2</sub>), reduce pore size, and improve the strengths of as-prepared specimens. The cold crushing strength and bending strength of as-prepared specimens with a 119 µm spherical pore size using 6 wt.% Y<sub>2</sub>O<sub>3</sub> were 35.2 and 13.0 MPa, respectively, with a heat conductivity being only 0.248 W/(m K).</p>","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"15 1","pages":""},"PeriodicalIF":2.5000,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Iron and Steel Research International","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s42243-024-01229-y","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
ZrO2-strengthened porous mullite insulation materials were prepared by foaming technology utilizing ZrSiO4 and Al2O3 as primary materials and Y2O3 as an additive. The effects of Y2O3 contents on the phase composition, microstructure, mechanical properties, and heat conductivity of the porous mullite insulation materials were investigated. A suitable Y2O3 content could promote phase transition of monoclinic ZrO2 (m-ZrO2) to tetragonal ZrO2 (t-ZrO2), reduce pore size, and improve the strengths of as-prepared specimens. The cold crushing strength and bending strength of as-prepared specimens with a 119 µm spherical pore size using 6 wt.% Y2O3 were 35.2 and 13.0 MPa, respectively, with a heat conductivity being only 0.248 W/(m K).
期刊介绍：
Publishes critically reviewed original research of archival significance
Covers hydrometallurgy, pyrometallurgy, electrometallurgy, transport phenomena, process control, physical chemistry, solidification, mechanical working, solid state reactions, materials processing, and more
Includes welding & joining, surface treatment, mathematical modeling, corrosion, wear and abrasion
Journal of Iron and Steel Research International publishes original papers and occasional invited reviews on aspects of research and technology in the process metallurgy and metallic materials. Coverage emphasizes the relationships among the processing, structure and properties of metals, including advanced steel materials, superalloy, intermetallics, metallic functional materials, powder metallurgy, structural titanium alloy, composite steel materials, high entropy alloy, amorphous alloys, metallic nanomaterials, etc..
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