TY - JOUR ID - 92944 TI - The optimization of dispersant content in alumina castable containing nano-titania JO - Advanced Ceramics Progress JA - ACP LA - en SN - 2423-7477 AU - Abbasian, Ahmad Reza AU - Omidvar-Askary, Najmeh AD - Department of Materials Engineering, Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran AD - Department of Materials Engineering, Naghshe Jahan Institute of Higher Education, Isfahan, Iran Y1 - 2018 PY - 2018 VL - 4 IS - Issue 3-4 SP - 16 EP - 22 KW - Alumina refractory castable KW - Ultra-low cement KW - Dispersant KW - Nano-TiO2 DO - 10.30501/acp.2018.92944 N2 - In this research, two series of ultra-low cement high alumina refractory castables containing 0 and 0.4 wt.% of nano-titania were prepared using different amounts of polycarbonic acid (DOLAPIX FF 26) as a dispersant. Several characteristics including microstructure, flowability, mechanical strength, bulk density and apparent porosity of the samples were analyzed. The results showed that the optimum amount of the dispersant was 0.13 wt.% and 0.20 wt.% for castable having no nano-titania and the one containing 0.4 wt.% nano-titania, respectively. The strength of castable containing 0.4 wt.% nano-titania dispersed by 0.20 wt.% of DOLAPIX FF 26 was 1.5 times higher than that of castable without nano-titania (dispersed by 0.13 wt.% of DOLAPIX FF 26). This can be explained by the fact that when the optimum amount of dispersant is used, the well-dispersed nano-titania particles act as a catalyst in the cement hydration reactions and will result in higher strength of the refractory castables. UR - https://www.acerp.ir/article_92944.html L1 - https://www.acerp.ir/article_92944_523ad69260518d06e2fc2247171478a3.pdf ER -