【摘要】 以水合硝酸盐为氧化剂、尿素为燃料、硝酸铵为助燃剂,根据化学计算原料的配比,进行SrZr(4 PO4)6纳米粉的低温燃烧合成。考察了不同点火温度、不同含水量和不同燃料配比的影响。对合成产物进行了X射线衍射、红外光谱物相分析,借助TEM对合成产物进行了形貌观察,结果发现,点火温度较高时,燃烧产物颗粒较大,非晶态物质减少;与其它合成方法相比,低温燃烧合成可快速得到晶态微粉:细小的分散开的纳米级颗粒(合成微粉中小颗粒尺寸可达20～30nm)和较粗大的颗粒。更多还原

【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 polycrystalline phase and scattered nano-sized particles.更多还原