作者：Bin Long1,2Gui-ying Xu1Buhr Andreas3
作者單位：1. School of Materials Science and Engineering,University of Science and Technology Beijing2. Almatis Qingdao Co.,Ltd.3. Almatis GmbH
刊名：International Journal of Minerals Metallurgy and Materials
ISSN：1674-4799
出版年：2017-02-15
卷：24
期：2
起頁：186-193
止頁：
分類號：TF341;TQ175.7
語種：英文
關鍵詞：
內容簡介Three different castables were prepared as steel-ladle purging-plug refractory materials: corundum-based low-cement castable(C-LCC),corundum–spinel-based low-cement castable(C-S-LCC),and no-cement corundum–spinel castable(C-S-NCC)(hydratable alumina ρ-Al2O3 bonded). The properties of these castables were characterized with regard to water demand/flow ability,cold crushing strength(CCS),cold modulus of rupture(CMo R),permanent linear change(PLC),apparent porosity,and hot modulus of rupture(HMo R). The results show the CCS/CMo R and HMo R of C-LCC and C-S-LCC are greater than those of the castable C-S-NCC. According to the microstructure analysis,the sintering effect and the bonding type of the matrix material differ among the three castables. The calcium hexaluminate(CA6) phase in the matrix of C-LCC enhances the cold and hot mechanical strengths. In the case of C-S-LCC,the CA6 and 2Ca O·2Mg O·14Al2O3(C2M2A14) ternary phases generated from the matrix can greatly increase the cold and hot mechanical strengths. In the case of the no-cement castable,sintering becomes difficult,resulting in a lower mechanical strength.
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