Phase study of SiO2-ZrO2 composites prepared from polymorphic combination of starting powders via a ball-milling followed by calcination

2nd International Symposium on Frontier of Applied Physics

Musyarofah^1 ; Nurlaila, R.^1 ; Muwwaqor, N.F.^1 ; Saukani, M.^2 ; Kuswoyo, A.^3 ; Triwikantoro^1 ; Pratapa, S.^1

Department of Physics, Faculty of Mathematics and Natural Sciences, Institute of Technology Sepuluh Nopember, Jalan Arief Rahman Hakim, Surabaya

60111, Indonesia^1

Department of Mechanical Engineering, Faculty of Engineering, University of Islam Kalimantan Muhammad Arsyad Al-Banjary, South Kalimantan, Indonesia^2

Department of Mechanical Engineering, Polytechnic Tanah Laut, Pelaihari, South Kalimantan, Indonesia^3

关键词: Amorphous zirconia;    Calcination temperature;    Cristobalites;    Lower temperatures;    Starting powders;    Tetragonal zirconia;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/817/1/012033/pdf
DOI  :  10.1088/1742-6596/817/1/012033

来源: IOP

【 摘 要 】

The effects of SiO2-ZrO2 polymorphic combinations as starting powders and calcination temperature on phase composition of the SiO2-ZrO2 composites were studied. Stoichiometric (1:1 mol%) mixtures of the SiO2-ZrO2 composites were mechanically activated using a ball-milling for 5 h followed by calcinations at 1000, 1100 and 1200 ?C for 3 h. The composites used in the present study were a-SiO2+ a-ZrO2, a-SiO2+ t-ZrO2, c-SiO2+ a-ZrO2 and c-SiO2+ t-ZrO2 which were symbolized by AA, AT, CA and CT, respectively. Prefixes a, t and c denote amorphous, tetragonal and cristobalite, respectively. The phase composition was determined by Rietveld analysis of X-ray diffraction (XRD) data using Rietica software. The identified phases for all calcined samples were a combination among t-ZrO2, c-SiO2, m-ZrO2 and zircon (ZrSiO4). Amorphous zirconia formed a transient tetragonal zirconia phase during heating, which reacted with silica to form zircon. The zircon phase was not found to form even at 1200 C in the AT and CT mixtures and at 1100 ?C in the CA mixture. The AA mixture in particular crystallized to form zircon at a lower temperature with more composition fraction than the others, ca 82.9 (14) mol%.