Synthesis of ZrSiO4 powders by a sol-gel method with varied calcination temperatures

2nd International Conference on Current Progress in Functional Materials 2017

Elsandika, G.^1 ; Putri, A.D.C.^1 ; Musyarofah, M.^1 ; Pratapa, S.^1

Department of Physics, Faculty of Science, Institute Technology Sepuluh Nopember, Surabaya

60111, Indonesia^1

关键词: Amorphous state;    Calcination temperature;    Mechanical activation;    Phase formations;    TEOS;    Tetra-ethyl-ortho-silicate;    Tetragonal zirconia;    ZrCl4;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/496/1/012047/pdf
DOI  :  10.1088/1757-899X/496/1/012047

来源: IOP

【 摘 要 】

The effect of calcination temperature on phase formation of the powders prepared with starting materials ZrCL4 and TEOS (tetraethylorthosilicate) was studied. Stoichiometric Zr/Si (1:1 mol%) mixture of samples were prepared by a sol-gel method after 5 wt.% of PVA (polyvinyl alcohol) addition as a catalyst and mechanical activation via ball milling for 5 h. The mixtures were then calcined at 900, 1000, 1100, 1200, and 1300 °C for 10 h. The phase composition was determined by Rietveld analysis of X-ray diffraction (XRD) data using Rietica software. Results showed that at calcination temperatures of 900, 1000, and 1100 °C, only tetragonal zirconia was observed, but retained silica in an amorphous state. Both phases then completely reacted to form zircon at 1200 °C. At 1300 °C, a little amount of zircon decomposed into tetragonal zirconia and cristobalite.