Preparation and properties of ZrO_(2)-strengthened porous mullite insulation materials using Y_(2)O_(3) additive  

作　　者：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 

机构地区：[1]Advanced Ceramics Research Center,School of Materials Science and Engineering,Anhui University of Technology,Ma'anshan 243002,Anhui,China [2]The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China

出　　处：《Journal of Iron and Steel Research International》2024年第6期1514-1521,共8页

基　　金：supported by the Natural Science Foundation of Anhui Provincial Education Department(2023AH051130 and KJ2021ZD0040);the University Synergy Innovation Program of Anhui Province(GXXT-2019-015);National Natural Science Foundation of China(51972002);the Student Research Training Program(SRTP)of Anhui University of Technology(S202310360191);National Innovation and Entrepreneurship Training Program for College Students(202210360023).

摘　　要：ZrO_(2)-strengthened porous mullite insulation materials were prepared by foaming technology utilizing ZrSiO_(4) and Al_(2)O_(3) as primary materials and Y_(2)O_(3) as an additive.The effects of Y_(2)O_(3) contents on the phase composition,microstructure,mechanical properties,and heat conductivity of the porous mullite insulation materials were investigated.A suitable Y_(2)O_(3) content could promote phase transition of monoclinic ZrO_(2)(m-ZrO_(2))to tetragonal ZrO_(2)(t-ZrO_(2)),reduce pore size,and improve the strengths of as-prepared specimens.The cold crushing strength and bending strength of as-prepared specimens with a 119µm spherical pore size using 6 wt.%Y_(2)O_(3) were 35.2 and 13.0 MPa,respectively,with a heat conductivity being only 0.248 W/(m K).

关 键 词：Porous mullite insulation material Zirconium oxide Y_(2)O_(3) Mechanical property Heat conductivity 

分 类 号：TB3[一般工业技术—材料科学与工程]