Silicon nitride ceramics with low thermal expansion coefficient

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What core problems can silicon nitride ceramics solve for you?
Q: Does your equipment face challenges such as material expansion and deformation, decreased accuracy, or reduced reliability in environments with high temperatures or drastic temperature differences?
Answer: Our low thermal expansion coefficient silicon nitride ceramics, with their extremely low thermal expansion characteristics (thermal expansion coefficient as low as 2.8 × 10 ⁻⁶/℃ from room temperature to 1000 ℃), can significantly reduce size drift caused by temperature changes, ensuring the dimensional stability and long-term accuracy of equipment in harsh environments.
Q: Are you looking for a material that combines high strength, high wear resistance, and resistance to thermal impact?
Answer: Silicon nitride ceramics not only have a low coefficient of thermal expansion, but also possess high fracture toughness, excellent thermal shock resistance (able to withstand instantaneous temperature differences of thousands of degrees), and outstanding wear and corrosion resistance, making them an ideal solution for high temperature, high speed, and high wear conditions.
Q: Do you need precision ceramic components with customized sizes and shapes to replace metal or traditional ceramics?
Answer: We provide full-size customized services from standard parts to complex shaped parts. We can produce various types of silicon nitride ceramic parts according to your drawings or needs, solving the problem of insufficient performance of traditional materials in specific environments.

Low thermal expansion coefficient silicon nitride ceramic is an advanced structural ceramic material made through high-purity silicon powder nitriding reaction and precision sintering process. Its most notable feature is its extremely low thermal expansion behavior over a wide temperature range (-50 ℃ to 1400 ℃), while maintaining high hardness, low density, excellent insulation, and chemical stability.

Key performance advantages
-Extremely low coefficient of thermal expansion (2.8-3.2 × 10 ⁻⁶/℃, much lower than most metals and alumina ceramics) ensures dimensional stability.
-Excellent thermal shock resistance: can withstand rapid temperature changes without cracking, suitable for rapid temperature rise and fall scenarios.
-High strength and toughness: The fracture toughness reaches 6-8 MPa · m ¹/², and the bending strength exceeds 800 MPa.
-Excellent wear and corrosion resistance: high hardness (Hv ≥ 1400), acid and alkali corrosion resistance, long service life.
-Good insulation and thermal conductivity: It combines electrical insulation and moderate thermal conductivity (15-30 W/m · K), suitable for electronic and thermal management scenarios.

Typical application areas
-Semiconductor manufacturing: used for wafer processing fixtures, heater substrates, vacuum suction cups, etc., to reduce process deviations caused by thermal deformation.
-Precision Instruments and Optics: As an optical platform, lens holder, and measuring instrument base, it ensures the stability of high-precision measurements.
-High temperature industrial equipment: used for high-temperature furnaces, rollers, thermocouple protection tubes, to enhance the equipment’s heat shock resistance.
-Automotive and Aerospace: Turbine rotor blades, bearing components, sensor housings, reducing weight and improving reliability.
-Laser and electronic packaging: as a heat sink substrate or packaging material, managing thermal expansion matching issues.

Customized service specifications
We support comprehensive customization, including:
-Size range: from micro components (minimum up to 0.5mm) to large structural components (maximum length 500mm).
-Shape complexity: capable of producing plates, tubes, rings, irregular parts, etc., and providing precision machining such as grinding, polishing, drilling, etc.
-Surface treatment: Coating, metallization, or special roughness treatment can be carried out according to the needs.
-Batch flexibility: supports small batch trial production to large-scale production.

Customer Application Case (Anonymous)
-A semiconductor equipment manufacturer: Using our customized high flatness silicon nitride ceramic heating plate, the thermal uniformity in wafer processing has been improved by 20%, and the product defect rate has been reduced by 15%.
-A precision optical laboratory: Using our low expansion ceramic optical platform base, we have achieved nanoscale measurement stability in temperature fluctuation environments, replacing imported products and reducing costs by 30%.
-A certain new energy battery enterprise: Applying our silicon nitride ceramic rollers to high-temperature sintering furnaces, the service life is extended by three times compared to traditional materials, and the maintenance cycle is significantly shortened.

Silicon nitride ceramics with low thermal expansion coefficient are becoming the cornerstone material for high-precision and high reliability industrial applications. Whether you are facing thermal management challenges, precision degradation issues, or material life bottlenecks, we can provide customized solutions for you. If you need to learn more technical details, request samples, or discuss customization needs, please feel free to contact us – let’s work together to push your product performance to new heights.

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.