How About the Magnesium Oxide Used for Thermal Conducting Filler?

   The magnesium oxide can be used for fill silicone rubber. When the dosage is less than 200, the heat conductivity and tensile strength of magnesium oxide with small particle size are larger than large particle size. And the rate of elongation at break is opposite. In addition, it is helpful for silicone rubber’s heat conductivity through adding a certain silane coupling agent. The optimum volume is about 0.5 percent of the usage of large particle size magnesium oxide.

   The thermal conducting filler is the mixed particle of aluminium oxide, magnesium oxide and boron nitride. It has good heat-conducting property and insulating property. Because it has a certain flexibility, and can tightly close with power device, heat aluminum fins, heat copper or machine casing. Therefore, it can obtain the good results of heat conduction and heat dissipation. At present, it has already been used for microprocessor, direct current converter, relay, UPS, automotive electronics, projectile lamps and other electronic products. At present, there are some thermally conductive and insulating filler of rubber with well heat-conducting property and insulating property: aluminium oxide, silicon nitride and others.

   The magnesium oxide’s heat-conducting property is slightly better than aluminium oxide, and can manufacture the rubber mat with higher thermal conductivity. Its electrical property is inferior than aluminium oxide. However, it still can meet the requirements from ordinary electric equipment products to insulating cement. And it is a kind of excellent thermally conductive and insulating filler of the rubber. But there is few report about it.  

   Meishen Technology is the largest magnesium oxide manufacturer in China. It was based on the new mode of management, perfected technology, attentive service and excellent quality. At present, our company has been already succeed in going abroad. 80% of trade business in the company is foreign trade business. What’s more, the products are widely recognized at home and abroad.

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