What is the high-temperature insulation performance of silicon nitride ceramics

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Silicon nitride ceramics, as an advanced structural ceramic material, have demonstrated irreplaceable value in extreme environments such as high temperature, high voltage, and high corrosion due to their excellent high-temperature resistance and excellent electrical insulation properties.

Analysis of High Temperature Insulation Properties of Silicon Nitride Ceramics
The high-temperature insulation properties of silicon nitride (Si ∝ N ₄) ceramics are attributed to their unique microstructure and chemical bonding properties
-High resistivity: The volume resistivity can reach 10 ¹⁴ -10 ¹⁵Ω· cm at room temperature, and can maintain a high resistivity of 10 ⁶ -10 ⁸Ω· cm even at a high temperature of 1000 ℃.
-Low dielectric constant and loss: The dielectric constant remains stable at 8-10 (1MHz), and the dielectric loss is below 0.005, ensuring insulation reliability at high frequencies and temperatures.
-High temperature stability: It can be used up to 1400 ℃ in an oxidizing atmosphere and up to 1800 ℃ in an inert atmosphere, with no softening or melting phenomenon and minimal insulation performance degradation.

Product Application: Core Selection for High Temperature Insulation Scenarios
Silicon nitride ceramics are widely used in the following high-temperature insulation fields:

1. Semiconductor manufacturing equipment: As an electrostatic suction cup and heater substrate, it provides stable insulation in high-temperature plasma environments.
2. New energy vehicles: Insulated substrates used for power modules in electric vehicles to enhance the voltage resistance and heat dissipation capabilities of motor controllers.
3. Aerospace: As a high-temperature sensor protective cover and ignition system component, it can withstand extreme thermal shock and corrosion.
4. Industrial heating system: used for high-temperature furnace supports, insulation bolts, replacing traditional alumina ceramics, and extending service life.

Product advantages: Why is silicon nitride ceramic the preferred choice?

1. Comprehensive performance balance:
   -High strength and toughness: The bending strength can reach 800-1000MPa, and the fracture toughness is 6-8 MPa · m ¹/².
   -Excellent thermal shock stability: low coefficient of thermal expansion (3.2 × 10 ⁻⁶/℃), resistant to rapid cooling and heating.
   -Corrosion resistance: resistant to molten metal and acid-base erosion.
2. Insulation reliability:
   -No ion migration phenomenon at high temperatures to avoid insulation failure.
   -The surface can be precision machined to Ra<0.2 μ m, reducing the risk of discharge.
3. Long lifespan and energy efficiency:
   -3-5 times longer lifespan than alumina ceramics, reducing equipment downtime costs.
   -High thermal conductivity (15-30 W/m · K) helps with heat dissipation and improves system energy efficiency.

Problem solving: Industry pain points that silicon nitride ceramics should address

1. Insulation failure in high temperature environments: Traditional polymer or alumina ceramics are prone to aging or brittle cracking at temperatures greater than 500 ℃, while silicon nitride ceramics provide long-lasting insulation.
2. Contradiction between thermal management and mechanical load: In power electronic modules, it is necessary to simultaneously address insulation, heat dissipation, and anti vibration requirements.
3. Component protection in corrosive media: In the chemical and metallurgical industries, metal protective covers are used instead to avoid short circuits and corrosion.

Customer Application Case (Anonymous)

1. A certain electric vehicle manufacturer:
   -Requirement: To improve the power density of the electric drive system, the insulation substrate must withstand temperatures greater than 200 ℃ and high voltages.
   -Solution: Adopt our customized silicon nitride ceramic substrate with a thickness of 0.8mm and integrated metallization circuit.
   -Result: The module’s voltage resistance has been increased to 3kV, the heat dissipation efficiency has been improved by 40%, and the mass production cost has been reduced by 15%.
2. Semiconductor equipment enterprises:
   -Requirement: Solve the insulation degradation problem of electrostatic suction cups in plasma etching machines at 600 ℃.
   -Solution: Replace with our silicon nitride ceramic suction cup, with a surface accuracy of ± 0.01mm.
   -Result: The insulation life has been extended from 6 months to 3 years, and the equipment utilization rate has increased by 25%.

Silicon nitride ceramics have become an irreplaceable key material under extreme working conditions due to their excellent high-temperature insulation performance. From semiconductors to new energy, from aerospace to industrial heating, it is pushing the boundaries of technology with reliability and durability.
Do you need customized silicon nitride ceramic insulation components? Welcome to contact us!

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.