Thermal expansion behavior,phase transitions and some physico-mechanical characteristics of fired doped rice husk silica refractory

作     者：Benjamin Iyenagbe UGHEOKE Othman MAMAT B.ARI-WAHJOEDI 

作者机构：Department of Mechanical EngineeringUniversiti Teknologi PETRONASBandar Seri Iskandar 31750TronohPerakMalaysia Department of Fundamental and Applied SciencesUniversiti Teknologi PETRONASBandar Seri Iskandar 31750TronohPerakMalaysia 

出 版 物：《Journal of Advanced Ceramics》 (先进陶瓷（英文）)

年 卷 期：2013年第2卷第1期

页      面：79-86页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 

基　　金：This work was supported in part by the Malaysian Ministry of Science Technology&Innovation(MOSTI)E-Science Fund(Project Code 03-02-02-SF0089)and UTP graduate assistantship scheme. 

主　　题：rice husk silica refractory thermal expansion phase transitions physico-mechanical characteristics 

摘      要：This paper presents the findings on thermal expansion behavior of slaked lime doped rice husk silica(RHS)refractory monitored between 25℃and 1500℃.It also reports the phase transition analysis within the temperature range of 850-1450℃.A sudden expansion of 0.7%noticed at 220℃is due to the transformation ofα-cristobalite toβ-cristobalite.The highest expansion(0.85%)reached within the temperature range of 650-850℃,remains almost constant for the investigated temperature range,and is not high enough to cause macro cracks in the refractory.The phase transition order is similar to those reported for quartzite refractory after 600℃,though the crystallization temperature is lowered due to the presence of the dopant.Modulus of rupture,apparent porosity,bulk density,refractoriness and reheat change are reported and their results meet with the standards qualifying them for use in coke ovens.