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25 * 20mm Pressureless Sintered SiC Roller

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Certificat
Chine Shaanxi KeGu New Material Technology Co., Ltd certifications
Chine Shaanxi KeGu New Material Technology Co., Ltd certifications
Examens de client
NGK apprécie son partenariat de longue date avec Shaanxi Kegu. Leurs céramiques SSiC excellent en qualité et en innovation, ce qui favorise notre succès mutuel. Continuons à collaborer !

—— NGK Thermal Technology Co.,Ltd

Chez Huike, nous sommes fiers de notre partenariat de longue date avec Shaanxi Kegu New Material Technology Co., Ltd., une collaboration basée sur la confiance, l'innovation et l'excellence partagée.Leur expertise en céramique SSiC et leurs solutions fiables ont toujours soutenu nos projets.

—— La société Suzhou Huike Technology Co., Ltd. est une société de technologie

Chez Keda, nous apprécions grandement notre partenariat de longue date avec la société Shaanxi Kegu New Material Technology Co., Ltd.Leurs solutions de céramique SSiC de haute qualité ont été intégrées à nos projets et nous attendons avec impatience une collaboration continue et un succès partagé..

—— Le groupe Keda Industrial Group Co., Ltd.

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25 * 20mm Pressureless Sintered SiC Roller

25 * 20mm Pressureless Sintered SiC Roller
25 * 20mm Pressureless Sintered SiC Roller 25 * 20mm Pressureless Sintered SiC Roller 25 * 20mm Pressureless Sintered SiC Roller

Image Grand :  25 * 20mm Pressureless Sintered SiC Roller

Détails sur le produit:
Lieu d'origine: Chine
Nom de marque: KeGu
Numéro de modèle: Rouleau SiC fritté sans pression 25*20 mm
Conditions de paiement et expédition:
Quantité de commande min: Négociable
Prix: Price is negotiable
Détails d'emballage: Boîte en bois solide pour une expédition mondiale
Délai de livraison: Négociable
Conditions de paiement: LC, D/A, D/P, T/T, Western Union
Contact

25 * 20mm Pressureless Sintered SiC Roller

description de

25 × 20mm Pressureless Sintered SiC Roller
25 × 20 mm Pressureless Sintered Silicon Carbide (SSiC) Precision Rod/Tube
Product Core Highlights
This product is manufactured from high-purity pressureless sintered silicon carbide (SSiC) with an outer diameter of 25 mm and an inner diameter of 20 mm. Through precision grinding, both the outer and inner diameter tolerances are controlled to within ±0.15 mm (total tolerance 0.3 mm), meeting demanding dimensional accuracy requirements for industrial applications.
SSiC Material Properties
Property Category Parameter Value / Range Key Advantage
Material Purity SiC Content ≥98.5 Vol% High purity, stable performance
Densification Density at 20°C ≥3.05 g/cm³ Dense structure, no visible pores
Densification Open Porosity ≈0 Vol% Fully dense, excellent impermeability
Hardness & Wear Resistance Rockwell 45N Hardness 93 R45N Extremely high hardness, excellent wear resistance
Hardness & Wear Resistance Vickers HV1 Hardness 2350 kg/mm² Far exceeds ordinary ceramics and metals
Mechanical Strength Flexural Strength at 20°C ≥380 MPa Strong room-temperature rigidity
Mechanical Strength Flexural Strength at 1300°C ≥420 MPa Strength does not decrease at high temperature
Mechanical Strength Elastic Modulus at RT 410 GPa Excellent resistance to deformation
Thermal Properties Coefficient of Thermal Expansion 4.0×10⁻⁶ /K Good dimensional stability
Thermal Properties Thermal Conductivity at 20°C 116 W/(m*K) Outstanding thermal dissipation
Thermal Properties Thermal Conductivity at 1200°C 35 W/(m*K) Maintains good thermal conductivity at high temperature
Thermal Properties Thermal Shock Resistance ΔT > 350°C Resists rapid heating/cooling, not prone to cracking
Thermal Properties Maximum Service Temperature in Air 1650°C Suitable for long-term ultra-high temperature use
Corrosion Resistance
Based on measured comparative data, the SSiC rod/tube exhibits an annual corrosion weight loss of <0.2 mg/cm²/yr in the following aggressive corrosive media (highest corrosion resistance level):
  • 98% sulfuric acid, 53% hydrofluoric acid, 85% phosphoric acid, 70% nitric acid, 25% hydrochloric acid
  • 50% sodium hydroxide, 45% potassium hydroxide
  • 10% hydrofluoric acid + nitric acid mixed solution
Comparative advantage: In strong alkali (50% NaOH) and hydrofluoric acid (53% HF) environments, reaction-bonded SiC and alumina show corrosion losses >1000 mg/cm²/yr (failure within days), whereas SSiC exhibits virtually no corrosion and can be used for long periods.
Machining and Tolerance Control
Parameter Nominal Value Tolerance Capability Remarks
Outer Diameter 25 mm ±0.15 mm Total tolerance 0.3 mm, precision ground
Inner Diameter 20 mm ±0.15 mm Total tolerance 0.3 mm, coaxial machining available
Wall Thickness 2.5 mm Concentricity ≤0.2 mm Ensures uniform wall thickness
Length Customized ±0.5 mm per 500 mm Maximum machinable length 1500 mm
Straightness ≤0.8‰ Over full length Meets kiln transport and sealing requirements
End Face Perpendicularity ≤0.1 mm Relative to OD datum Facilitates installation and connection
The outer and inner diameter tolerances are controlled within 0.3 mm. High-precision internal grinding machines and centerless grinders are used to ensure dimensional consistency along the entire length of the rod/tube. Custom end chamfering, stepped profiles, flanges, and other structures are available upon request.
Surface Quality and Appearance Requirements
  • Surface roughness: OD ground to Ra ≤0.8 μm; ID can be fine-ground to Ra ≤0.4 μm upon request.
  • Visual defects: No cracks, no pores or impurity spots larger than 0.5 mm in diameter. No edge chipping on end faces.
  • Dye penetrant inspection (optional): Performed according to ASTM E1417 to detect surface-opening defects, ensuring no through-wall cracks.
Quick Comparison with Rods/Tubes Made of Other Materials
Parameter SSiC (This Product) Reaction-Bonded SiC (RSiC) Alumina (Al₂O₃) Tungsten Carbide (WC)
Density (g/cm³) ≥3.05 3.02 3.8-3.9 14.9
Max. Service Temperature (°C) 1650 1380 1650 (but strength degrades) 800
Free Silicon Content None ~10-20% None None
Alkali Corrosion Resistance (50% NaOH) <0.2 mg/cm²/yr >1000 (failure within days) >1000 (severe corrosion) Good
Hydrofluoric Acid Corrosion Resistance Excellent (<0.2) Poor Poor Moderate (8.0)
Volume Resistivity (Ω*cm) >10¹⁰ Conductive Insulating Conductive
Relative Cost Medium-High Medium Low Very High
This product offers outstanding combined performance in high-temperature, strong-corrosion, and wear-resistant applications, making it particularly suitable for harsh conditions such as strong alkalis, hydrofluoric acid, and high-temperature oxidizing atmospheres.
Typical Application Scenarios
  • High-temperature roller kilns: Sintering of lithium battery materials, rapid firing of ceramics, debinding of electronic ceramics
  • Chemical heat exchangers: Sulfuric acid concentration, phosphoric acid production, hydrofluoric acid regeneration units
  • Thermocouple protection tubes: Temperature measurement in aluminum melting furnaces, glass melting furnaces, incinerators
  • Corrosive slurry transfer pipes: Hydrometallurgy, titanium dioxide production, high-concentration acid/alkali conveying
  • Mechanical seals: Wear-resistant sealing sleeves for chemical pumps handling media containing solid particles
For further information or to discuss your specific requirements, please contact us directly.

Produit Tag:

Céramique au carbure de silicium,

SIC fritté sans pression,

Sic céramique

Coordonnées
Shaanxi KeGu New Material Technology Co., Ltd

Personne à contacter: Ms. Yuki

Téléphone: 8615517781293

Envoyez votre demande directement à nous (0 / 3000)

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céramique au carbure de silicium

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Carbure de silicium lié par réaction

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