Wear-resistant Silicon Nitride Ceramic Drawing WheelSilicon Nitride Guide Roller

Overview of Silicon Nitride Guide Roller

A Silicon Nitride Guide Roller is a high-performance ceramic guide roller. It is characterized by high strength, high hardness, high-temperature resistance, corrosion resistance and wear resistance. With good thermal stability, it can maintain good dimensional accuracy and mechanical properties under high-temperature environments. At the same time, the smooth surface of the Silicon Nitride Guide Roller, with a small friction coefficient, can effectively reduce the resistance and wear in the process of material transfer, which is widely used in the production line of semiconductor, photovoltaic, glass and other industries.

Features of Silicon Nitride Guide Roller

Silicon Nitride Guide Roller has a series of outstanding features:

High hardness and strength: Silicon nitride has high hardness and strength so that the guide roller can withstand greater pressure and tension in high-speed operation and heavy load conditions, can still maintain good stability and wear resistance, and is not easy to deformation, wear and other problems, to extend the service life of the guide roller.

Excellent high-temperature resistance: Silicon nitride guide rolls have excellent high-temperature resistance, can maintain good mechanical properties and dimensional stability in high-temperature environments, and can withstand high temperatures of 1200 ℃ or even higher, which makes it excellent in high-temperature production processes such as glass manufacturing, hot rolling of iron and steel, and effectively reduces the production errors caused by thermal deformation.

Good chemical stability: silicon nitride guide rollers have excellent chemical stability; acid, alkali and other chemical substances corrosion in some harsh chemical environments can also work normally and not easy to be erode. To ensure the performance and accuracy of the guide rollers, suitable for a variety of complex industrial production scenarios.

Low friction coefficient: Silicon Nitride guide rollers have smooth surfaces and a low friction coefficient, which can reduce the resistance of materials in the process of transmission, reduce energy loss, and also avoid scratching the surface of materials, improve the quality of the products, especially suitable for the transmission of materials with high requirements on the surface quality, such as electronic materials, thin film materials and so on.

The specifications table of the Silicon Nitride Guide Roller

Property	Unit	Typical Value
Color	/	Grey
Density	g/cm³	3.21
Compressive Strength	MPa	3000
Flexural Strength	MPa	800
Weibull – Modulus	/	15
Fracture Toughness	MPa·m¹/²	6.5
Young’s Modulus	GPa	320
Poisson Ratio	/	0.28
Hardness (Vickers, HV1)	GPa	16
Maximum Temperature (Inert Gas)	℃	1200
Maximum Temperature (Air)	℃	1100
Thermal Conductivity (at 20℃)	W/m·K	28
Thermal Conductivity (at 1000℃)	W/m·K	16
Thermal Expansion (20 – 100℃)	10⁻⁶/K	2
Thermal Expansion (20 – 1000℃)	10⁻⁶/K	3.5
Thermal Shock Parameter R1	K	600
Thermal Shock Parameter R2	W/mm	15
Resistivity (at 20℃)	Ω·cm	10¹²
Resistivity (at 800℃)	Ω·cm	10⁷
Dielectric Constant	MHz	6

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Applications of Silicon Nitride Guide Roller

Semiconductor industry: In the production of semiconductor wafers, high-precision transfer and positioning are required. Silicon nitride guide rollers are characterized by high hardness, high precision and low coefficient of friction, which can accurately transfer wafers and avoid scratches on the surface of wafers, thus ensuring high-quality production of semiconductor devices.

Photovoltaic industry: In the manufacture of solar cell wafers, silicon nitride guide rollers are used for wafer transfer and positioning. Its high-temperature and wear-resistant characteristics can adapt to the high-temperature process and frequent material transfer in the photovoltaic production process, improving production efficiency and product quality.

Glass industry: In glass annealing, float glass production and other processes, silicon nitride guide rollers can work stably in a high-temperature environment, bear the weight of glass and realize smooth transmission. Due to its good chemical stability, it will not have a chemical reaction with glass liquid, which ensures the quality and surface finish of glass.

Electronic material industry: For some high-precision electronic materials, such as liquid crystal panels, flexible circuit boards, etc., silicon nitride guide rollers can provide precise transmission and stable support to prevent the material from deformation or damage during the transmission process, which meets the requirements of high-precision and high-reliability for the production of electronic materials.

Company Profile

RBOSCHCO is a trusted global chemical material supplier & manufacturer with over 12 years of experience in providing super high-quality chemicals and Nanomaterials. The company exports to many countries, such as the USA, Canada, Europe, UAE, South Africa, Tanzania, Kenya, Egypt, Nigeria, Cameroon, Uganda, Turkey, Mexico, Azerbaijan, Belgium, Cyprus, Czech Republic, Brazil, Chile, Argentina, Dubai, Japan, Korea, Vietnam, Thailand, Malaysia, Indonesia, Australia, Germany, France, Italy, Portugal etc. As a leading nanotechnology development manufacturer, RBOSCHCO dominates the market. Our professional work team provides perfect solutions to help improve the efficiency of various industries, create value, and easily cope with various challenges. If you are interested, please send an email to sales1@rboschco.com

Payment Term

T/T, Western Union, Paypal, Credit Card etc.

Shipment Term

By air, by sea, by express, as customers request.

5 FAQs of Silicon Nitride Guide Roller

Q1: How to extend the service life of silicon nitride guide rollers?

Regular cleaning: Wipe the surface with neutral cleaner (e.g., alcohol) every week to remove oil and dust to avoid particle abrasion. Avoid sudden change of temperature: After using it at high temperatures, it needs to be cooled down slowly (e.g., natural cooling) to prevent thermal stress cracking. Bearing inspection: check the bearing clearance every month and replace it in time if it is found to be loose to avoid the guide rollers’ eccentricity leading to increased wear. Surface treatment: Adopt pre-oxidation treatment (form Si₂N₂O protective layer), which can improve corrosion and oxidation resistance. Load control: avoid exceeding the rated load (usually ≤100N/mm) to prevent structural fatigue fracture.

Q2: How long is the life of silicon nitride guide rollers?

Semiconductor industry: 3-5 years (24 hours per day operation). Photovoltaic industry: 2-3 years (coating process).

Glass industry: 1-2 years (high-temperature annealing kiln). Metallurgical industry: 6-12 months (high-speed wire rod mill).

Note: The actual life is affected by the working conditions, such as a steel mill using silicon nitride guide rollers, life from 3 months to 18 months.

Q3: How to choose the right silicon nitride guide roll?

Temperature adaptation: Choose hot-pressed silicon nitride (HPSN) for high-temperature scenarios (>1000℃) and reaction-sintered silicon nitride (RBSN) for medium temperature (600-800℃). Precision requirements: The semiconductor industry needs to choose the processing accuracy of ±0.002mm mirror guide roller (surface roughness Ra ≤ 0.1μm). Corrosion resistance: the photovoltaic coating process in contact with hydrofluoric acid requires the selection of high-purity silicon nitride (purity ≥ 99.9%). Cost control: When the budget is limited, metal-based composite guide rollers (e.g., steel core + silicon nitride coating) can be used, reducing the cost by 30%.

Q4: Are silicon nitride guide rolls environmentally friendly?

Yes, it is. Silicon nitride material is free of heavy metal pollution, and the production process complies with ISO14001 environmental management system certification. The products of some manufacturers (such as Kaisin Technology) can be recycled to reduce the waste of resources.

Q5: Can silicon nitride guide rollers be repaired?

Minor wear: can be repaired by grinding (accuracy restored to ±0.01mm). Serious damage: such as cracks or chipped edges, need to be replaced as a whole, with higher repair cost (about 50% of new products).