WANG Meiting, CHEN Yuqing

(School of Materials Science and Engineering, Shandong Institute of Light Industry Jinan 250353)

Abstract: SrZr₄(PO₄)₆ micro-powders were prepared by low temperature combustion synthesis(LCS), in which nitrates were used as oxidizers while urea was used as fuels and NH₄NO₃ as an combustion additive. The influences of various ignition temperatures , various water content and fuel content, on the synthesis were examined. Researches were done on the synthesized product by X- ray and infrared absorption spectrum phase analysis , and the microstructure was also observed with the help of TEM. It is found that higher ignition temperature leads to a bigger particle size and less amount of amorphous phase in the product powders and LCS can produce crystalline micro- powders rapidly. The synthesized powders can be sorted into two groups by size: larger particles with smooth surface and amorphous phase or with serrated outline and polycrys talline phase and scattered nano- sized particles .

Key words: low temperature combustion synthesis , nitrates , nanopowders , ignition temperature