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제품 소개실리콘카바이드 세라믹

25 * 20mm Pressureless Sintered SiC Roller

인증
중국 Shaanxi KeGu New Material Technology Co., Ltd 인증
중국 Shaanxi KeGu New Material Technology Co., Ltd 인증
고객 검토
NGK는 산시 케구와의 오랜 파트너십을 소중히 여기고 있습니다. 그들의 SSiC 세라믹은 품질과 혁신에 탁월하며, 우리의 상호 성공을 이끌고 있습니다.

—— NGK 열 기술 회사

후이커는 신뢰, 혁신, 그리고 공동의 우수성을 바탕으로 하는 산시 커구 신소재 기술 유한 회사와의 오랜 파트너십에 자부심을 느낍니다. SSiC 세라믹에 대한 그들의 전문 지식과 안정적인 솔루션은 지속적으로 저희 프로젝트를 지원해 왔습니다.

—— 쑤저우 후이커 기술 유한 회사

케다에서 우리는 산시 케구 신소재 기술 회사와 오랜 파트너십을 매우 높이 평가합니다.그들의 고품질의 SSiC 세라믹 솔루션은 우리의 프로젝트에 필수 요소였습니다. 우리는 지속적인 협업과 공동의 성공을 기대합니다..

—— 케다 산업 그룹 (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

큰 이미지 :  25 * 20mm Pressureless Sintered SiC Roller

제품 상세 정보:
원래 장소: 중국
브랜드 이름: KeGu
모델 번호: 25*20mm 무압력 소결 SiC 롤러
결제 및 배송 조건:
최소 주문 수량: 협상 가능
가격: Price is negotiable
포장 세부 사항: 글로벌 배송을 위한 튼튼한 나무 상자
배달 시간: 협상 가능
지불 조건: L/C,D/A,D/P,T/T,웨스턴 유니온

25 * 20mm Pressureless Sintered SiC Roller

설명

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.

연락처 세부 사항
Shaanxi KeGu New Material Technology Co., Ltd

담당자: Ms. Yuki

전화 번호: 8615517781293

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