Materials and Energy Research Center (MERC) Iranian Ceramic Society (ICERS) Advanced Ceramics Progress 2423-7477 3 2 2017 05 01 Determination of cristobalite phase content in ceramic cores using various X-ray quantitative phase analysis methods 1 6 70045 10.30501/acp.2017.70045 EN R. Naghizadeh School of Metallurgy and Material Engineering, Iran University of Science and Technology (IUST) 0000-0002-2379-2106 Faramarz Kazemi School of Metallurgy and Material Engineering, Iran University of Science and Technology (IUST) 0000-0002-4685-2095 Farzin Arianpour School of Metallurgy and Material Engineering, Iran University of Science and Technology (IUST) Razieh Ghaderi Mapna Turbine Blades Eng. and Mfg. Co, Mapna Maryam Haj Fathalian Mapna Turbine Blades Eng. and Mfg. Co, Mapna Mahdiar Taheri School of Metallurgy and Material Engineering, Iran University of Science and Technology (IUST) HamidReza Rezaie School of Metallurgy and Material Engineering, Iran University of Science and Technology (IUST) 0000-0003-2855-7823 Journal Article The aim of this research is to investigate different X-ray based quantitative phase analysis methods for determination of cristobalite phase content in ceramic cores. For this purpose, four popular routes including peak absolute intensity method, relative intensity ratio method, direct or calibration method and internal standard (or Alexander-Klug) method have been chosen. Some control samples have been made using common raw materials used in the ceramic cores and characterized by X-ray diffraction (XRD) to measure the main peaks intensities. Using each quantitative method with their unique mathematical calculation procedures, the cristobalite phase contents have been calculated and compared to the real contents in the samples. The results showed that the presence of the amorphous fused silica phase could make drastic effects on the accuracy of the X-ray based quantitative phase analysis routes and the peak absolute intensity method showed the best results among the other routes. https://www.acerp.ir/article_70045_bc889cf354e6686a28e593c3b97ee287.pdf