What are the characteristics of 95 alumina ceramics

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95% alumina ceramic is a high-performance ceramic material with an alumina content of up to 95%, thus possessing numerous excellent physical and chemical properties.

1、 High hardness and wear resistance
The hardness of 95 alumina ceramics is extremely high, with a Rockwell hardness of around 85, second only to diamond and cubic boron nitride. This characteristic enables 95 alumina ceramics to maintain stable performance for a long time in environments with severe wear, making them an ideal choice for abrasives, grinding tools, and other fields. For example, in grinding machines such as ball mills, vibration mills, planetary mills, and agitator mills, 95 alumina ceramic grinding balls can significantly improve grinding efficiency and extend service life.

2、 High strength and mechanical properties
95 alumina ceramics not only have high hardness, but also possess high strength. Its bending strength is between 300-400MPa, and its tensile strength is generally above 160MPa, demonstrating excellent mechanical properties. This enables 95 alumina ceramics to withstand large loads and stresses, making them suitable for engineering fields that require high strength, such as high-speed bearings, pneumatic valves, mechanical seals, etc.

3、 High temperature resistance performance
The melting point of 95 alumina ceramics is as high as around 2050 ℃, and it can maintain good performance even in high temperature environments. This characteristic makes 95 alumina ceramic the preferred high-temperature structural material, widely used in high-temperature equipment such as heaters, nitrogen generators, and flow meters. Meanwhile, in high-temperature working environments, 95 alumina ceramics can maintain stable performance and are not easily deformed or damaged.

4、 Good corrosion resistance
95 alumina ceramics can resist the corrosion of chemicals such as acid, alkali, and salt, and have good corrosion resistance. This has enabled 95 alumina ceramics to be widely used in corrosion-resistant equipment in fields such as chemical engineering and metallurgy. For example, in the sealing components and gas transmission systems of chemical equipment, 95 alumina ceramics can work stably for a long time and are not easily damaged.

5、 Excellent insulation performance
95 alumina ceramic is an excellent electronic insulation material with high volume resistivity. According to the industry standard GB/T5593-1999, at 100 ℃, the volume resistivity ρ ν ≥ 1 × 10 ¹³ Ω· cm; At 300 ℃, ρν≥ 1 × 10 ¹⁰Ω· cm; At 500 ℃, ρν≥ 1 × 10 Ω· cm. In fact, the volume resistivity of the 95 ceramics we currently produce is 1-2 orders of magnitude higher than the above regulations. In addition, 95 alumina ceramics also have excellent electrical properties such as low dielectric loss and high electrical strength, and have been widely used in fields such as power and electronics, such as manufacturing insulators, electronic ceramic substrates, and electronic tubes.

6、 Other performance
In addition to the main characteristics mentioned above, 95 alumina ceramics also have other excellent properties. For example, its average coefficient of linear expansion is relatively small, which matches the coefficient of expansion of metal materials and is suitable for sealing with metal parts; Has good thermal shock resistance and can withstand high temperatures and rapid cooling and heating without damage; High volume density, good airtightness, suitable for manufacturing devices that require high vacuum degree, etc.

7、 Application Fields
Due to its numerous excellent properties, 95 alumina ceramics are widely used in various fields. In the field of electronics, 95 alumina ceramics are used to manufacture electronic devices such as insulators, electronic ceramic substrates, and electronic tubes; In the field of mechanical manufacturing, it is used to manufacture key components such as high-speed bearings, pneumatic valves, and mechanical seals; In the field of chemical engineering, it is used to manufacture key components such as seals and gas transmission systems for chemical equipment. In addition, 95 alumina ceramics have been promoted and used in the construction and hygiene porcelain industry as well as in the deep processing of non-metallic mineral products.

95 alumina ceramics play an important role in industrial production due to their high hardness, high strength, high temperature resistance, good corrosion resistance, and excellent insulation properties.