White corundum is widely used in electronic ceramic materials, mainly due to its high purity, high hardness, excellent insulation and thermal stability. The following are the specific applications of white corundum in electronic ceramic materials:

I. Substrate materials

White corundum can be used to manufacture ceramic substrates for electronic devices, which have excellent insulation and thermal conductivity and are suitable for high power and high frequency applications. For example, in multilayer ceramic capacitors (MLCC), white corundum can provide high dielectric constant and low dielectric loss as a substrate material.

II. Insulation layer

White corundum can be used to prepare insulating coatings for electronic components, which can prevent electrical short circuit and improve the reliability of components. In addition, it can also be used as a dielectric layer material for capacitors and insulating layers, providing high dielectric strength and low dielectric loss.

III. Packaging materials

White corundum is used for ceramic packaging of semiconductors and electronic components, providing mechanical protection and electrical insulation, while helping to dissipate heat. It can also be used as a thermal interface materials to fill the gap between the chip and the radiator and improve the heat dissipation efficiency.

IV. Piezoelectric ceramics

White corundum can be used to manufacture piezoelectric ceramics, which are used in sensors, transducers and actuators, and have excellent piezoelectric properties and stability.

V. Microwave dielectric ceramics

White corundum can be used to make microwave dielectric ceramics, which can be applied to microwave devices such as filters, resonators and antennas, providing low dielectric loss and high stability.

VI. Transparent ceramics

White corundum can be used to make transparent ceramics, which are used in laser, infrared window and transparent nail-mounting, and have high transparency and mechanical strength.

VII. Grinding and polishing materials

White corundum can be used for precise grinding and polishing of electronic ceramic components to ensure high surface finish and dimensional accuracy. Its high hardness and wear resistance make it an ideal abrasive material.

VIII. Functional ceramics

White corundum can be used to manufacture thermal management ceramics, which can be applied to heat sinks and heat sinks to improve the heat dissipation performance of electronic devices. In addition, it can also be used to manufacture sensor ceramics, which are applied to temperature, pressure and gas sensors with high sensitivity and stability.

IX. Strengthening the properties of ceramics

White corundum particles can be added to the mineral materials of ceramic products, which can significantly improve the hardness, wear resistance and strength of ceramic products. It can also adjust the thermal expansion coefficient of ceramics to better match other parts.

X. Thermal insulation and sintered insulating materials

White corundum micropowder can be used for thermal insulation and sintering isolation of electronic ceramics to ensure the stability of components during high temperature sintering.

XI. Manufacture of high-temperature ceramic products

Because of its high melting point and high temperature resistance, white corundum is often used to manufacture high temperature ceramic products, such as refractory pipes, furnace parts and furnace lining plates.

The application of white corundum in electronic ceramic materials mainly benefits from its high purity (ALO ≥ 99%), high hardness (Mohs hardness 9), excellent insulation and thermal stability. These characteristics make it indispensable in electronic ceramics industry and widely used in the manufacture of various high-performance electronic components.