是六方形晶體層狀結構。在常溫下化學性質穩定。1370℃開始分解。315℃開始被氧化，溫度越高氧化越快。

在各種介質和高溫、低溫、高負荷、高速度制動等情況下都有優異的潤滑性和降低摩擦系數的特性。

在摩擦材料中作用：1.低溫時減小摩擦系數降低磨損。

2.高溫時由于摩擦過程中發生氧化轉變為三氧化鉬和三硫化鉬失去層狀結構，不能降低摩擦系數，但能夠抑制樹脂向鋼鐵表面的轉移，有效的減小復合物的磨損提高其耐磨性，延長使用壽命。

3.氧化產物MoO3、MoS3和MoS2形成共聚物顆粒，溫度升高時共聚物顆粒膨脹，從而產生增摩作用。

Molybdenum disulfide

Six squarecrystal layer structure. Stable chemical properties at room temperature.1370 ℃begins to decompose.315 ℃begins to be oxidation, high temperatureoxidation faster.

In a varietyof medium and high temperature, low temperature, high load, high speed braking situationshave excellent lubricity and reduce the coefficient of frictioncharacteristics. following:

1 ,lowtemperature to reduce the friction coefficient reduced wear.

2 ,hightemperature oxidation change due to lost of layered structure of molybdenumtrioxide and three molybdenum sulfide friction process, can reduce the frictioncoefficient, but can inhibit the resin transfer to steel surface, reducing thewear of composites improve its wear resistance effectively, prolong the servicelife.

3,Copolymerparticles formed oxidation products of MoO3, MoS3 and MoS2, when the temperaturerises copolymer particles expansion, resulting in increased friction.