The biggest disadvantage of fused magnesium oxide is hygroscopicity. It makes the electric performance of electric heating element getting worse. As a result, in order to prevent moisture absorption, someone has to make elements drying or deal the ends with seal. This will not only cause trouble in the processing, but also result in some sealing difficulties. For this reason, people are keen on moisture-proof research in fused magnesium oxide.
In moisture-proof processing, the best technology is using organic silicide (most of the use is silicone) to coat on magnesia powder particle surface, the coated magnesia with resin has a very good effect on moisture-proof, and maintain the insulation resistance in the cold or certain temperature (below 500 degrees Celsius). According to the quality of the raw material and organic silicide quality of heat and moisture, the moisture-proof magnesium oxide can be divided into cold damp magnesium oxide (the working temperature of electric heat pipe shape element is less than 400 degrees Celsius) and medium temperature moisture magnesium oxide (the working temperature of electric heat pipe shape element is less than 600 degrees Celsius).
The two processing methods are that firstly selecting fused magnesium oxide which has reached the quality standard, then through crushing, screening, ratio of particle size distribution. Mixing a certain amount of organic silicon resin into the reactor, then stirring evenly, the following is to remove organic solvent and make the resin curing, finally cooling, screening agglomerate powder.
This production technology is widely applied in recent years. Our fused magnesium oxide quality has caught up with the developed countries. And the products of Hebei Meishen chemical technology Group Co.,Ltd have entered the international market.
2014年10月4日星期六
Fused magnesium oxide for electric heating
The production of fused magnesium oxide for electric heating in China is starting from 1960s, and it has achieved rapid development with national economy for decades. Especially since the reform and opening up, household electric heater is used widely, so it's not hard to understand that the demands of the insulating material of magnesium oxide are also growing. At present, the production in the northeast has become a pillar industry.
The characteristics of fused magnesium oxide for electric heating are high resistance, high thermal conductivity, high voltage, low leakage current, and it is the ideal insulation material for household, industrial electric appliances.
As fused magnesium oxide for electric appliances, it has many special requirements including chemical properties, particle shape, crystal shape, etc. The quality is much less than the developed capitalist countries in the past. But in recent years, we have made great progress and gradually caught up with the international advanced level by the efforts of scientific research institutes, universities and colleges, technical workers in the factory.
The raw magnesia for electric heating in China is divided into several levels, the content of magnesium oxide more than 99% is known as 99, the content more than 98% is known as 98, the content more than 97% is known as 97, and so on. Normally the content more than 97% is called the first level magnesia, the content more than 96% is called the secondary level magnesia. And the first level magnesia is used for electric heating element, the secondary level magnesia is used for refractory.
Hebei Meishen chemical technology Group Co.,Ltd specialized manufacture fused magnesium oxide for electric heating. After testing thousands of times, we had developed many kinds of magnesium oxide suitable for dedicated. And we can also product according to customer's different formula, to meet the different indexes requirements. Details you can directly consult our online customer service, we will have someone answer to you.
The characteristics of fused magnesium oxide for electric heating are high resistance, high thermal conductivity, high voltage, low leakage current, and it is the ideal insulation material for household, industrial electric appliances.
As fused magnesium oxide for electric appliances, it has many special requirements including chemical properties, particle shape, crystal shape, etc. The quality is much less than the developed capitalist countries in the past. But in recent years, we have made great progress and gradually caught up with the international advanced level by the efforts of scientific research institutes, universities and colleges, technical workers in the factory.
The raw magnesia for electric heating in China is divided into several levels, the content of magnesium oxide more than 99% is known as 99, the content more than 98% is known as 98, the content more than 97% is known as 97, and so on. Normally the content more than 97% is called the first level magnesia, the content more than 96% is called the secondary level magnesia. And the first level magnesia is used for electric heating element, the secondary level magnesia is used for refractory.
Hebei Meishen chemical technology Group Co.,Ltd specialized manufacture fused magnesium oxide for electric heating. After testing thousands of times, we had developed many kinds of magnesium oxide suitable for dedicated. And we can also product according to customer's different formula, to meet the different indexes requirements. Details you can directly consult our online customer service, we will have someone answer to you.
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| Fused magnesium oxide |
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