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Factors affecting the activity of active magnesium oxide

Release time:2023-08-09 Visits:401

Factors affecting the activity of active magnesium oxide


Active magnesium oxide is one of the magnesia series products. However, some indicators are different between them. Active magnesium oxide requires a suitable particle size distribution, and the microscopic morphology of irregular particles or near-spherical particles or flake crystals. There are many factors affecting the activity of magnesium oxide, and then we carry out a specific analysis from several aspects:

1. Physical properties of magnesium oxide

The particle size, specific surface area and other physical properties of magnesia directly affect its activity. In general, the smaller the particle size and the larger the specific surface area, the larger the contact area with other substances, and the higher the activity.

2.The crystallization of magnesium oxide

Under normal circumstances, the more complete the crystallization of magnesium oxide, the lower the activity. The more complete the crystal, the fewer defects, the more stable the chemical properties and the lower the activity.

3. The quality of raw materials

The quality of raw materials also has an obvious effect on the activity of magnesium oxide. Good quality raw materials can improve the purity of magnesium oxide, reduce the presence of impurities, and therefore have better activity. At the same time, the REDOX reaction in the smelting process of raw materials will also affect the activity of magnesium oxide. Selecting a suitable reducing agent can promote the oxidation reaction and improve the activity of magnesium oxide.

4. Thermodynamic conditions

Thermodynamic conditions are also one of the important factors affecting the activity of magnesium oxide! It includes temperature, pressure and atmosphere. For example, in the preparation of magnesium oxide, the high-temperature reaction can promote the formation of magnesium oxide and improve its activity. Not only that, the choice of atmosphere will also have an impact on the process of oxidation reaction, thus affecting the activity of magnesium oxide.

5. Additives

The activity of magnesium oxide is also affected by additives. For example, adding a certain amount of Al, Ca and other elements can cause the reaction of magnesium with other elements, thereby changing the oxidation reaction process and improving the activity of magnesium oxide. In addition, a suitable carrier can also be used to disperse magnesium oxide in it to increase its surface area and prevent agglomeration, thereby improving the activity of magnesium oxide.

6. Activator

In the preparation process of magnesium oxide, some compounds such as K2O, Na2CO3, MnO2 and Fe2O3 are added as activators to adjust the process of oxidation reaction, improve the properties of magnesium oxide, and significantly increase the activity of magnesium oxide.

In summary, the activity of magnesium oxide is affected by a variety of factors, which are related to each other and determine its activity. Weifang Wanfeng New Material Technology Co., Ltd. will fully consider these factors in the process of preparing highly active magnesium oxide, and then choose the appropriate method and process to achieve the desired effect.

Application of inorganic flame retardants in epoxy resins

Aluminum based flame retardant

In the flame retardant market, the main substance used in aluminum flame retardants is hydrated alumina, which has a condensed phase flame retardant effect. When it is decomposed by heat, it will be transformed into AlO(OH), and will absorb the combustion heat, reduce the combustion temperature, and promote the polymer combustion when the viscous ring carbonization occurs.

The advantage of aluminum flame retardants is that the cost is lower, but the addition amount is higher. In order to improve the flame retardant efficiency and improve the compatibility with the matrix, Al2O3 canbe modified. A new thermosetting EP(Al2O3-PTDOB/EP) was obtained by adding alumina to hyperbranched flame retardant (PTDOB) to modify epoxy resin. The experiment shows that not only the flame retardant performance of the modified epoxy resin is improved, but also the thermal conductivity of the material is improved due to the addition of Al2O3. The FR-EP composite was prepared by using a new type of expansive flame retardant and aluminum hydroxide (ATH) to modify the epoxy resin. The results show that the modified material can form a stable carbon layer, which can prevent the release of combustible gas, heat insulation and oxygen resistance.

Magnesium flame retardant

Magnesium flame retardants are mainly magnesium hydroxide. When it is subjected to high temperature, it will be decomposed into magnesium oxide and water by heat, and the generated water will absorb a lot of heat, and cool the matrix to achieve a flame retardant effect. WEN et al. synthesized an inorganic curing agent TRPAM-MEL with magnesium hydroxide and other substances, and the experiment proved that TRPAM-MEL showed excellent flame retardant properties when applied to epoxy resin system. When magnesium hydroxide microwhisker (mw-MH) is added to epoxy resin as a super reinforcement material, it is found that due to the blocked network structure, magnesium hydroxide microwhisker has better fire resistance than traditional industrial magnesium hydroxide. Wanfeng main products, welcome to negotiate.

The importance of magnesium oxide in the rubber industry

The use of magnesium oxide is very wide, it can be used in rubber, medical plugs, adhesives and other hundreds of fields, today we talk about some of the effects of magnesium oxide in the rubber industry:

1. Reinforcing agent, magnesium oxide is a very important reinforcing agent of heat-resistant rubber in nitrile rubber;

2.anti-coke agent, in the chloroprene rubber as vulcanization agent and active agent, has a good anti-coke effect;

3. acid absorber, absorb halogenated butyl rubber in the vulcanization process released hydrogen chloride;

4. thickener, in the composite material application, increase the viscosity of the formula;

5. vulcanization accelerator, in the halogenated butyl rubber can do vulcanization agent;

6.corrosion resistance, prevent the erosion of mold organisms or ultraviolet rays on rubber;

7. high temperature resistance, can greatly improve the heat conductivity of rubber;

8. adhesion, can increase the bonding performance with the metal skeleton, improve the rubber roll.

Magnesium oxide in the rubber industry has a lot of role, although it is not the most important material, but it is indispensable!

Application of magnesium hydroxide in water treatment

Magnesium hydroxide products are widely used in various industries, such as unsaturated polyester, epoxy resin, rubber, paint flame retardant filler and so on. In fact, it can also be applied to the water treatment industry. What are the details? The following Xiaobian will introduce its application in wastewater decolorization.

1. acid wastewater treatment

Acid containing wastewater and waste liquid are mainly from acid containing wastewater and waste liquid discharged from pickling workshops of machinery, electrical appliances, tools and other factories. In addition to sulfuric acid, hydrochloric acid, nitric acid, hydrofluoric acid, etc., waste acid also contains a large number of metal ions. The traditional treatment of acidic wastewater is usually neutralized with milk of lime or limestone, soda ash, caustic soda, and other alkaline substances. To ensure complete precipitation of metal ions, it is often difficult to control pH. The effect of using it to treat sewage is better than caustic soda or limestone, because it is necessary to ensure proper pH value, nutritional conditions and alkalinity in the biochemical treatment of wastewater. It is difficult to control its alkalinity with caustic soda or limestone. It is widely used as an acid wastewater treatment agent. In addition, it is also suitable for acid containing waste gases (SO2, HCl, NO2).