What is the thermal conductivity of alumina ceramics

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Q: What is the thermal conductivity of alumina ceramics? Is it suitable for key components that require heat dissipation?
Answer: Alumina ceramics have moderate thermal conductivity (about 20-30 W/m · K). Although not as good as high thermal conductivity ceramics such as aluminum nitride, they have become an ideal material for electronic heat dissipation, high-temperature equipment, chemical machinery, and other fields due to their excellent insulation, high temperature resistance, corrosion resistance, and mechanical strength. It can effectively solve the contradiction between heat dissipation and insulation, improve equipment reliability, and extend service life.

Detailed explanation of thermal conductivity of alumina ceramics
The thermal conductivity of alumina ceramics (Al ₂ O3) is closely related to its purity, microstructure, and process. Generally speaking:
-96% purity alumina ceramic: thermal conductivity of approximately 20-25 W/m · K;
-High purity alumina with a purity of over 99%: thermal conductivity can reach 25-30 W/m · K.
Compared with other materials:
-Ordinary steel: about 50 W/m · K, but poor insulation;
-Aluminum nitride ceramic: about 180 W/m · K, but the cost is relatively high;
-Plastic:<1 W/m · K, insulated but with poor heat dissipation. Alumina ceramics are at a “balance point” in terms of thermal conductivity, meeting most heat dissipation needs while also possessing excellent electrical insulation properties (volume resistivity>10 ¹⁴Ω· cm) and high temperature resistance (long-term use temperature>1500 ℃).

Core advantages and application areas of the product

1. Product advantages
   -Combining heat dissipation and insulation: solving the dual needs of high-power heat dissipation and safe insulation for electronic devices;
   -High temperature resistance and corrosion resistance: suitable for acidic and alkaline environments and high temperature scenarios;
   -High mechanical strength: high hardness, wear resistance, can be processed into complex structural components;
   -Good dimensional stability: low coefficient of thermal expansion, not easily deformed at high temperatures.
2. Typical application scenarios
   -In the field of electronic appliances: semiconductor substrates, heat sinks, insulation gaskets, power module substrates;
   -Industrial equipment: high-temperature furnace lining plates, laser components, chemical pump valve seals;
   -In the field of new energy: fuel cell separators, heat dissipation components for energy storage equipment;
   -Medical devices: high-temperature sterilization trays, insulation components for testing instruments.

Customization of specifications and service support
We provide comprehensive customized services to meet diverse needs:
-Size customization: Supports processing of sheet, tube, and irregular structures, with a thickness of 0.1mm to 50mm, and a maximum planar size of 500mm × 500mm;
-Purity selection: Provides various purity specifications such as 92%, 96%, 99%, etc;
-Surface treatment: precision machining such as polishing, metallization, laser drilling, etc. can be carried out;
-Technical cooperation: Provide material selection and structural optimization suggestions based on customer heat dissipation design requirements.

Customer Application Case (Anonymous)
-Case 1: A new energy vehicle enterprise adopts our customized high-purity alumina ceramic heat dissipation substrate for the power module of the motor controller, which reduces the working temperature by 15% and increases the module life by 30%;
-Case 2: A semiconductor equipment manufacturer used our processed alumina ceramic vacuum suction cups to achieve stable heat dissipation and insulation in high-temperature etching processes, resulting in a 12% increase in product yield;
-Case 3: A chemical company purchased our corrosion-resistant alumina ceramic pipe liner to replace stainless steel components in strong acid environments, extending equipment maintenance cycles by three times.

Alumina ceramics have become an irreplaceable material in the high-end manufacturing field due to their balanced thermal conductivity and comprehensive advantages. If you have cooling design or special working conditions requirements, please feel free to contact us at any time for customized solutions and sample support – let us empower your products with reliable ceramic solutions!

Brudeze Ceramics supplies and sells a wide range of high-quality quartz glass, including alumina ceramics, zirconia ceramics, silicon nitride ceramics, aluminum nitride ceramics, silicon carbide ceramics, boron carbide ceramics, bioceramics, machinable ceramics, etc. We can meet the customization requirements of various ceramic products.