<p><b>二硫化鎢</b>是一種無機化合物，化學式為WS<sub>2</sub>。
</p>


<h2><span id=".E6.80.A7.E8.B4.A8"></span><span id="性质">性質</span></h2>
<p>灰色有金屬光澤的細小六方晶系結晶或粉末。在空氣中穩定。不溶於水，溶於硝酸和氫氟酸混酸中。溶於熔融鹼，不溶於醇。
</p>
<h2><span id=".E5.88.B6.E5.A4.87"></span><span id="制备">製備</span></h2>
<p>鎢酸銨與硫化氫氣體反應，沉澱出四硫代鎢酸銨。後者再經高溫焙燒，分解為二硫化鎢。
</p>
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<p>二硫化鎢是一種新型的固體潤滑劑，適用於高溫、高壓、高負荷和高真空條件下的潤滑。可添加在工程塑料中製成自潤滑元件，也可與揮發性溶劑混合，噴塗於金屬表面，在沖鍛中用來提高模具壽命和工件的光潔度。
</p>
<h2><span id=".E5.8F.82.E8.80.83.E8.B5.84.E6.96.99"></span><span id="参考资料">參考資料</span></h2>

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**二硫化鎢**是一種無機化合物，化學式為 WS2。

## 性質

灰色有金屬光澤的細小六方晶系結晶或粉末。在空氣中穩定。不溶於水，溶於硝酸和氫氟酸混酸中。溶於熔融鹼，不溶於醇。

## 製備

鎢酸銨與硫化氫氣體反應，沉澱出四硫代鎢酸銨。後者再經高溫焙燒，分解為二硫化鎢。

　
: ${\rm {\ (NH_{4})_{2}WO_{4}+4H_{2}S\rightarrow (NH_{4})_{2}WS_{4}\downarrow +4H_{2}O}}$

　
: ${\rm {\ 2(NH_{4})_{2}WS_{4}+3O_{2}\rightarrow 2WS_{2}+4NH_{3}\uparrow +2S+2SO_{2}\uparrow +2H_{2}O}}$

## 用途

二硫化鎢是一種新型的固體潤滑劑，適用於高溫、高壓、高負荷和高真空條件下的潤滑。可添加在工程塑料中製成自潤滑元件，也可與揮發性溶劑混合，噴塗於金屬表面，在沖鍛中用來提高模具壽命和工件的光潔度。

## 參考資料
12138-09-9