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25 * 20mm Pressureless Sintered SiC Roller

認証
中国 Shaanxi KeGu New Material Technology Co., Ltd 認証
中国 Shaanxi KeGu New Material Technology Co., Ltd 認証
顧客の検討
NGKは、陝西科谷との長年のパートナーシップを高く評価しています。彼らのSSiCセラミックスは品質と革新性に優れており、私たちの相互の成功を牽引しています。今後も協力関係を継続しましょう!

—— NGKサーマルテクノロジー株式会社

ハイケでは,信頼,革新,共同卓越性に基づいた長年の協力関係,山西ケグ新材料技術株式会社と 誇りを持っています.SSiCセラミクスの専門知識と信頼性の高いソリューションは,一貫して私たちのプロジェクトを支援しています.

—— スズーホイケ・テクノロジー・カンパニー

私たちは,ケダで,山西ケグ新材料技術株式会社との長年のパートナーシップを非常に評価しています.彼らの高品質のSSiCセラミックソリューションは 私たちのプロジェクトに不可欠なものであり, 我々は継続的な協力と共通の成功を期待しています.

—— ケダ・インダストリアル・グループ株式会社

オンラインです

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

大画像 :  25 * 20mm Pressureless Sintered SiC Roller

商品の詳細:
起源の場所: 中国
ブランド名: KeGu
モデル番号: 25*20mm 加圧焼結 SiC ローラー
お支払配送条件:
最小注文数量: 交渉可能
価格: Price is negotiable
パッケージの詳細: 世界中に発送できる丈夫な木箱
受渡し時間: 交渉可能
支払条件: L/C、D/A、D/P、T/T、ウェスタンユニオン

25 * 20mm Pressureless Sintered SiC Roller

説明

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.

連絡先の詳細
Shaanxi KeGu New Material Technology Co., Ltd

コンタクトパーソン: Ms. Yuki

電話番号: 8615517781293

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