Nanosize WO3 were synthesized by hydrothermal method using sodium tungstate and tungsten chloride as raw material and glycol and urea as assistant in strong acid system. The products were characterized by XRD,SEM and EDX,and the effect of hydro-thermal condition on the morphologies of nanosize WO3 were studied. The results indicate that the important influence of different raw materials on the morphologies of nanosize WO3 under the same hydrothermal conditions. The hex-WO3 was obtained with sodium tungstate as raw material and glycol as assistant reagent.%以钨酸钠、六氯化钨作为钨源,乙二醇、尿素为辅助盐,在酸性反应体系通过水热法合成了纳米WO3,利用XRD、SEM和EDS等对产物进行了表征。结果表明：采用不同的钨源,在相同的水热体系下,对获得的纳米级WO3形貌有较大的影响。采用钨酸钠作为钨源,乙二醇作为辅助剂可获得六方相的WO3。
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