Ceramic Blades
Si3N4 Silicon Nitride Ceramic Blades and Knives
Black blades for hot cutting and rapid temperature change
Silicon nitride is described as the best all round structural ceramic, and the blade is where that shows. It carries high hardness and wear resistance up to 1200 degrees, but unlike most ceramics it takes rapid temperature change without cracking, so a hot cut followed by a cold restart does not destroy the edge. The black Si3N4 body is chemically stable and resists acid attack at temperature.
Key Benefits
- High temperature resistance to 1200 degrees for hot cutting duty
- Good thermal shock resistance, so rapid temperature changes do not crack the blade
- Low thermal conductivity keeps process heat from travelling into the holder
- Good chemical stability and high corrosion resistance, including acid attack at temperature
- Low density, so a large blade does not add rotating mass
Problems It Solves
- Ceramic blades cracking when the line stops and the blade cools quickly
- Steel blades losing temper on hot cutting duty
- Edge corrosion in acidic process environments
Who It Is For
- Process engineers whose blades fail from thermal shock rather than wear
- Machine builders specifying blades for heated equipment
- Buyers replacing steel blades that anneal in service
Application Scenarios
Hot cutting and trimming in machinery applications
Electronic and chemical process cutting
Petroleum industry cutting and scraping duty
Wear parts where temperature cycling is part of the process
Technical Features
- High temperature resistance to 1200 degrees
- Good thermal shock resistance under rapid temperature change
- Good heat dissipation with low density
- Black silicon nitride body, dimension customized
Manufacturing Process
Raw material preparation, forming, surface grinding, internal and external diameter grinding and precision CNC machining are all carried out in house.
Materials
- Silicon nitride Si3N4
Specifications
| Material | Silicon nitride Si3N4 |
|---|---|
| Colour | Black |
| Dimension | Customized |
| Minimum order quantity | 10 pcs |
| Temperature resistance | 1200 degrees |
| Application | Machinery, electronic, chemical, petroleum |
Figures are taken from the published product specification. Values not listed are marked TBC and confirmed against your drawing before quotation.
Quality Control
- Edge and surface inspected before packing
- Dimensions checked against your drawing
- Inspection report supplied on request
Certifications
No third party certification documents are published for this product. Every shipment is inspected to your drawing with an inspection report issued. Certification status is TBC and confirmed on request.
Customization Options
- Blade dimension fully customized from your drawing
- Straight, circular and profiled geometry
- Trial quantities from 10 pieces
Comparison With Other Ceramics
Against zirconia, silicon nitride handles far more heat and takes thermal shock better, and it is the choice when the blade runs hot. Zirconia stays the better option for cold cutting where a white, non-magnetic blade is wanted at lower cost.
Use Guide
- Silicon nitride tolerates temperature change, but avoid quenching a hot blade in liquid
- Check holder clamping force; over-clamping a ceramic blade causes edge cracks
- Specify the operating temperature with your enquiry so the right body is quoted
Industries Using This Part
Related Application Notes
Si3N4 Silicon Nitride Ceramic Blade Knife FAQ
What temperature can the blade run at?
Silicon nitride blades carry high temperature resistance of 1200 degrees.
Does it survive rapid temperature change?
Yes, good thermal shock resistance is one of the defining characteristics of silicon nitride and it is not affected by rapid temperature changes in normal service.
What is the minimum order quantity?
10 pieces.
Can you make blades to our drawing?
Yes. Dimension is customized. Our main business is OEM and ODM, so send the drawing.
Which industries use these blades?
Machinery, electronic, chemical and petroleum applications.
How is the shipment protected?
Standard packaging protocols are followed and photographs of the packing and shipping process are provided.
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