Correlation between thermal behavior of clays and their chemical and mineralogical composition: a review

Global Colloquium on GeoSciences and Engineering 2017

Yanti, Evi Dwi^1 ; Pratiwi, I.^1

Technical Implementation Unit for Mine's and Geological Hazard Mitigation, Liwa Indonesian Institute of Science, Pekon Padang Dalom, West Lampung, Indonesia^1

关键词: Chemical and mineralogical compositions;    Chemical compositions;    Cristobalites;    Geological conditions;    SEM analysis;    Thermal behaviors;    Thermal process;    Tile industry;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/118/1/012078/pdf
DOI  :  10.1088/1755-1315/118/1/012078

来源: IOP

【 摘 要 】

Clay's abundance has been widely used as industrial raw materials, especially ceramic and tile industries. Utilization of these minerals needs a thermal process for producing ceramic products. Two studies conducted by Septawander et al. and Chin C et al., showed the relationship between thermal behavior of clays and their chemical and mineralogical composition. Clays are characterized by XRD analysis and thermal analysis, ranging from 1100°C to 1200°C room temperature. Specimen of raw materials of clay which is used for the thermal treatment is taken from different geological conditions and formation. In raw material, Quartz is almost present in all samples. Halloysite, montmorillonite, and feldspar are present in Tanjung Morawa raw clay. KC and MC similar kaolinite and illite are present in the samples. The research illustrates the interrelationships of clay minerals and chemical composition with their heat behavior. As the temperature of combustion increases, the sample reduces a significant weight. The minerals which have undergone a transformation phase became mullite, cristobalite or illite and quartz. Under SEM analysis, the microstructures of the samples showed irregularity in shape; changes occurred due the increase of heat.