用热液法制备了ＮａｘＷＯ３，ｘ为０００１８～００３８０，这是一类新的六方晶钨氧化合物．斜方晶钨酸钠酸化水洗，再进行热液脱水；当钠含量≥１６０×１０－６时（质量分数），得到斜方晶ＷＯ３·１３Ｈ２Ｏ单相，当钠含量≤４０×１０－６时，得到ＷＯ３·Ｈ２Ｏ单相，当钠含量在４０×１０－６～１６０×１０－６之间则为两相混合物．斜方晶ＷＯ３·１３Ｈ２Ｏ在２９０～４２０℃脱水得到六方晶ｈＮａｘＷＯ３；继续升高温度在４２０～４５０℃恒温处理，则得到单斜晶ｍＮａｘＷＯ３． NaxWO3 was prepared by hydrothermal method with x of 00018 ~ 00380, which is a new type of hexagonal tungsten oxide. Orthorhombic sodium tungstate acidified water washing, and then hydrothermal dehydration; when the sodium content ≥ 160 × 10-6 (mass fraction), to obtain orthorhombic WO3 · 13H2O single-phase, when the sodium content ≤ 40 × 10-6 , To obtain WO3 · H2O single phase, when the sodium content of 40 × 10-6 ~ 160 × 10-6 between the two-phase mixture. The orthorhombic WO3 · 13H2O was dehydrated at 290 ~ 420 ℃ to obtain hexagonal hNaxWO3. When the temperature was further increased from 420 ℃ to 450 ℃, monoclinic mNaxWO3 was obtained.