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glass fiber magnesium oxide,magnesium oxide for glass fiber,magnesium oxide CAS 1309-48-4
, magnesium oxide for glass fiber
, magnesium oxide CAS 1309-48-4
Magnesium Oxide Product Overview:
Magnesium oxide (chemical formula MgO) is a high-melting-point, non-toxic, white powdered inorganic compound. As an alkaline oxide, it possesses excellent fire resistance, chemical stability, and adsorption properties. It is widely used in industrial refractory materials, pharmaceutical antacids, environmental pollution control, food additives, and new energy materials.
Magnesium oxide specifications:
| Chemical formula |
magnesium oxide |
| CAS Number |
1309-48-4 |
| Place of Origin |
Shandong, China |
| Appearance |
White to light yellow powder |
| EINECS No. |
215-171-9 |
| color |
white |
| Grade Standard |
Food Grade, Industrial Grade, Agriculture Grade |
| Pack |
25 kg/bag |
| Shape |
Powder shape |
Characteristics of magnesium oxide :
Magnesium oxide used in glass fiber production must possess specific characteristics that are compatible with the glass melting process and fiber performance requirements. These characteristics can be summarized as follows:
First, high purity and low impurities. Typically, the magnesium oxide content is required to be ≥95%, and the levels of impurities such as silicon, iron, calcium, and chlorine are strictly controlled (e.g., iron ≤ 0.1%, calcium ≤ 0.5%). This prevents impurities from forming bubbles or stones in the molten glass, or affecting the fiber's transparency and mechanical properties, ensuring defect-free finished glass fibers.
Second, appropriate activity and particle size are required. Magnesium oxide powders with medium-to-low activity (activity value 40-60s) and fine particle size (average particle size 1-5μm) are often used. This allows for uniform mixing with glass raw materials such as quartz sand and soda ash, rapid dissolution during high-temperature melting, and participation in the formation of the glass network structure, avoiding uneven composition due to incomplete dissolution.
Third, stable chemical properties are required, with good thermal stability (high temperature resistance). The powder must be heat-resistant (above 2800°C) and non-decomposition and non-volatilization in the high-temperature environment of glass melting (1500-1600°C). It must also stably react with elements such as silicon and aluminum to form a dense glass structure. Its alkalinity must also be mild and controllable to avoid excessive corrosion of the furnace's refractory materials.
Fourth, it must have low hygroscopicity and fluidity. The finished product must be dried to a moisture content of ≤0.5% to prevent moisture absorption and agglomeration during storage or mixing, which could affect the dispersion of the raw materials. The powder must also exhibit good fluidity to accommodate the continuous feeding and precise metering requirements of glass production, ensuring a stable and efficient production process.
Advantages of magnesium oxide:
Magnesium oxide plays a key functional role in the production of glass fiber, and its advantages run through multiple dimensions such as material performance optimization, production process adaptation, and application value enhancement. From a performance perspective, magnesium oxide, with its high melting point characteristics, can effectively enhance the high-temperature resistance of glass fiber, making it less likely to soften and deform in high-temperature environments. At the same time, it can optimize the glass network structure, significantly improve the tensile strength, impact resistance, and folding resistance of the fiber, reduce the risk of breakage during drawing, weaving, and subsequent use, and enhance the fiber's resistance to acid and alkali corrosion and humid environments, delaying material aging; in terms of production technology, it can reduce the viscosity of the glass melt and improve its fluidity, facilitate the smooth completion of drawing and forming, reduce problems such as uneven fiber thickness and surface defects, and adjust the melt crystallization temperature to avoid premature crystallization during cooling, ensuring fiber From the perspective of cost and environmental protection, magnesium oxide has a wide range of raw materials (such as magnesite and dolomite) and is inexpensive, which can effectively control production costs while ensuring performance. Its non-toxic and non-volatile properties can avoid the generation of harmful gases or pollutants during the production process, meeting the requirements of green production. In addition, in glass fiber reinforced composite materials (such as glass magnesium board and fiberglass reinforced plastics), magnesium oxide can also improve the interfacial bonding between fibers and matrix materials such as resin and cement, reduce interfacial gaps, and further enhance the overall structural stability and comprehensive mechanical properties of composite materials, providing more reliable material support for subsequent applications.
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