Magnesium Oxide Material Characteristics
The core material advantages of magnesium oxide ceramics stem from the crystal structure and chemical properties of magnesium oxide itself, and high-purity raw materials combined with advanced sintering processes further enhance their performance:
- Excellent high-temperature resistance: Magnesium oxide ceramics have a melting point as high as 2852℃, a long-term service temperature of over 1800℃, and can withstand an extreme high temperature of 2000℃ for a short time, far exceeding ordinary metals and traditional ceramic materials. It has excellent thermal stability, is not prone to thermal shock cracking during repeated heating and cooling cycles, and can maintain structural integrity, making it an ideal material for high-temperature working conditions.
- Superior electrical insulation performance: Within a wide frequency range and high-temperature environment, magnesium oxide ceramics still maintain a very high volume resistivity (over 10¹⁴Ω·cm at 20℃), a breakdown electric field strength of more than 10kV/mm, and extremely low dielectric loss. This stable insulation performance is not significantly affected by changes in humidity and temperature, providing reliable insulation protection for electronic components and power equipment.
- Outstanding chemical stability: Magnesium oxide ceramics have stable chemical properties, good corrosion resistance to most acid, alkali, and salt solutions, and can especially resist the erosion of molten metals, glass melts, and high-temperature steam. It does not chemically react with most metals and can maintain stable performance in both oxidizing and reducing atmospheres, avoiding erosion and damage to the material by the working environment.
- Good thermal conductivity: Compared with other insulating ceramics, magnesium oxide ceramics have a higher thermal conductivity (about 36W/(m·K) at room temperature), which can quickly conduct heat, effectively reduce the local temperature during equipment operation, reduce the impact of thermal stress on products and equipment, and extend the service life.
- High strength and wear resistance: After high-temperature sintering, magnesium oxide ceramics form a dense crystal structure, with high flexural strength and hardness (Mohs hardness of about 6.5-7.0), excellent wear resistance, which can resist particle erosion and mechanical friction, and maintain structural integrity under harsh working conditions.
MgO Tube Advantages
- High-purity control: High-quality magnesium oxide raw materials with a purity of ≥99% are used, and impurities are removed through a precision purification process to ensure extremely low impurity content of the product. High purity not only improves core performances such as high-temperature resistance and insulation but also reduces performance fluctuations caused by impurities, ensuring the stability of product quality.
- Dense and uniform structure: By optimizing sintering process parameters (sintering temperature, holding time, atmosphere control, etc.), the internal structure of the ceramic tube is dense, avoiding performance defects caused by pores. The dense structure not only enhances mechanical strength and wear resistance but also improves corrosion resistance and thermal conductivity efficiency.
- Strong customization capability: According to customer needs, the product specifications (outer diameter, inner diameter, length, wall thickness), shape (straight tube, conical tube, special-shaped tube), can be flexibly adjusted to meet the personalized needs of different application scenarios and provide one-stop solutions.
MgO Tube Application Fields
The excellent performance of magnesium oxide ceramic tubes has made them widely used in many high-end industries, becoming core components of key equipment:
- Electronics and electrical power industry: Used as high-frequency insulators, vacuum switch tube casings, electron tube packaging tubes, etc., in high-voltage power transmission equipment, microwave communication equipment, and semiconductor manufacturing equipment. Its excellent insulation performance and high-temperature resistance can work stably in high-voltage and high-frequency environments, ensuring the reliability and safety of equipment; at the same time, it can be used as packaging material for thermistors and varistors to improve the stability and service life of electronic components.
- Metallurgy and chemical industry: Used as flow guide tubes for molten metal smelting, thermocouple protection tubes, lining tubes for chemical reactors, etc. It can resist the erosion and high-temperature scouring of molten steel, aluminum liquid, copper liquid, etc., providing a stable channel for temperature measurement and metal flow guiding; in chemical reactions, it can be used as a pipeline for transporting corrosive gases and liquids, avoiding corrosion of equipment by chemical media, and is suitable for reaction environments with strong acids, alkalis, high temperatures, and high pressures.
Technical specifications
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