Synthesis mechanism and phase stability analysis of z-Y2Si2O7 by sol-gel process

Synthesis mechanism and phase stability analysis of square z-Y2Si2O7 was studied in this research by using Y(NO3)(3)Greek ano teleia6H(2)O and tetra ethoxy orthosilicate as precursors. The concentration of the precursor directly affects the degree of hydrolysis of tetra ethoxy orthosilicate and the uniformity of the gel by Fourier transform infrared spectral analysis. The thermogravimetric analysis shows that the crystallization temperature of the precursor decreases gradually with the decrease of precursor concentration. Because the low precursor concentration is beneficial to the formation of the homogeneous molecular level of yttrium silica network gel. Finally, the crystallized z-Y2Si2O7 was detected by X-ray diffraction and further verified by a transmission electron microscope after calcining at 800 degrees C. The maximum stable temperature of z-Y2Si2O7 was less than 1050 degrees C. The microscopic morphology of z-Y2Si2O7 is square nanoparticles. The grain size of z-Y2Si2O7 increases with the decrease of precursor concentration.

Automated summary

This study investigated the synthesis mechanism and phase stability of square z-Y2Si2O7 using Y(NO3)3•6H2O and tetra ethoxy orthosilicate as precursors. It was found that lower precursor concentration is beneficial for the formation of a homogeneous yttrium silica network gel and stable z-Y2Si2O7 was achieved at 800 degrees C. The maximum stable temperature of z-Y2Si2O7 was found to be less than 1050 degrees C.