Comprehensive properties of silicon nitride ceramics

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What core problems can silicon nitride ceramics solve for users?
-Q: I need a material that can work stably in extreme high temperatures (above 1200 ° C) and corrosive environments. What is the solution?
Answer: Silicon nitride ceramics have excellent high-temperature stability and corrosion resistance, and can be used for a long time below 1600 ° C. They are an ideal choice for high-temperature furnaces, chemical nozzles, and other scenarios.
-Q: Our precision bearings need to have high hardness, low wear, and lightweight characteristics, which traditional metal materials cannot meet. What are the alternative solutions?
Answer: Silicon nitride ceramics have high hardness, low density, and self-lubricating properties, which can significantly reduce the friction coefficient and extend the bearing life. They are widely used in high-speed machine tools, wind power equipment, and other fields.
-Q: How to ensure production yield for substrates and fixtures that require high purity and heat shock resistance in semiconductor manufacturing?
Answer: Silicon nitride ceramics have a low coefficient of thermal expansion, excellent thermal shock resistance, and a purity of over 99.9%. They are key materials for semiconductor wafer fixtures and etching components.

Silicon nitride ceramics are high-performance engineering ceramics synthesized through high-temperature sintering, and their comprehensive performance is supported by multiple indicators:

1. Mechanical properties
   -Hardness: HV10 ≥ 1500, second only to diamond and cubic boron nitride.
   -Bending strength: 600-1200 MPa, better than most metal alloys.
   -Fracture toughness: 6-8 MPa · m ¹/², belonging to high toughness materials in ceramics.
2. Thermal properties
   -High temperature resistance: Long term use temperature up to 1200 ° C, short-term can withstand 1600 ° C.
   -Low thermal expansion coefficient: 3.2 × 10 ⁻⁶/° C (room temperature~1000 ° C), close to silicon chips, with good thermal matching.
   -High thermal conductivity: 15-30 W/(m · K), suitable for heat dissipation components.
3. Chemical stability
   -Corrosion resistance: can resist most acids, alkalis, and molten metal corrosion (except hydrofluoric acid).
   -Antioxidant properties: A dense SiO ₂ protective layer is formed on the surface in a high-temperature oxidation environment, preventing further oxidation.
4. Electrical and Special Properties
   -Insulation: Volume resistivity>10 ¹⁴Ω· cm (room temperature).
   -Dielectric constant: 9-10 (1 MHz), suitable for high-frequency circuit substrates.
   -Biocompatibility: Complies with ISO 10993 standard and can be used for medical implants.

Product application areas: full coverage from industry to high-tech
The multi field applications of silicon nitride ceramics demonstrate their irreplaceability:
-High end manufacturing industry
Bearing balls, cutting tools, turbine rotor blades – utilizing their high hardness, low density (3.2 g/cm ³), and wear resistance to enhance equipment speed and lifespan.
-Energy and Environmental Protection
Gas turbine sealing ring and photovoltaic polycrystalline silicon ingot furnace components – high temperature and corrosion resistance characteristics help improve energy equipment efficiency.
-Electronic Semiconductor
Chip bonding suction cup, etching machine nozzle, insulated heat dissipation substrate – high purity and anti plasma erosion ability ensure chip manufacturing yield.
-Medical and scientific research
Artificial joints, CT machine slip rings, vacuum coating fixtures – biocompatibility and vacuum sealing meet the requirements of precision medical equipment.

Customized service: comprehensive adaptation from size to performance
We provide flexible product customization solutions that cover the entire process from prototype to batch:
-Size customization
Support the processing of micro balls with a diameter of 0.5mm to large structural components with a diameter of 500mm, and the thickness can be controlled within the range of 0.1mm-100mm.
-Shape and accuracy
It can produce complex shaped parts (such as turbine blades and porous nozzles) with a dimensional accuracy of ± 0.01mm and a surface roughness Ra ≤ 0.05 μ m.
-Performance control
By adjusting the sintering process, it is possible to selectively optimize toughness (enhance fiber composites) or thermal conductivity (increase sintering density).
-Post processing support
Provide secondary processing such as precision grinding, laser drilling, and metallization coating to meet assembly and integration requirements.

Customer Application Case (Anonymous)
-Case 1: Wind power enterprises
A global wind power equipment manufacturer has adopted our silicon nitride ceramic bearing balls to replace the original steel bearings. Under the same operating conditions, the friction loss is reduced by 40%, the maintenance cycle is extended from 6 months to 18 months, and the annual power generation efficiency of a single unit is increased by 2.3%.
-Case 2: Semiconductor Equipment Manufacturer
Customized high-purity silicon nitride nozzle for a chip etching machine manufacturer, which can work continuously for 8000 hours in CF ₄/O ₂ plasma environment without cracking or deformation. The wafer fragmentation rate on the customer’s production line has decreased by 0.07%, and the annual cost savings of consumables exceed 2 million yuan.
-Case 3: Medical Device Company
We have developed a porous silicon nitride cervical fusion device for orthopedic implant companies, which promotes bone ingrowth through a pore size gradient design (200-500 μ m). Clinical trials have shown a 30% reduction in fusion time, and it has obtained FDA Class III device certification.

Silicon nitride ceramics, with their cross dimensional performance combination, are becoming a key material for high-end manufacturing upgrades. Whether it is solving material failure problems under extreme working conditions or pushing the performance boundaries of precision equipment, it demonstrates irreplaceable value.
If you are looking for reliable material solutions or need customized silicon nitride ceramics for specific working conditions, please feel free to contact us at any time. We will provide full cycle support from material selection to testing and validation to help your product stand out in the competition.

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.