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25 * 20mm Pressureless Sintered SiC Roller

Name: 25 * 20mm Pressureless Sintered SiC Roller
Brand: Shaanxi KeGu New Material Technology Co., Ltd
SKU: 25*20 мм спеченный ролик SiC без давления
Availability: InStock

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Сертификация

Китай Shaanxi KeGu New Material Technology Co., Ltd Сертификаты

Просмотрения клиента

NGK ценит наше давнее партнерство с Шэньси Кегу. Их керамика SSiC превосходит качество и инновации, что способствует нашему взаимному успеху.

—— NGK Thermal Technology Co., Ltd.

В Huike мы гордимся нашим давним партнерством с Shaanxi Kegu New Material Technology Co., Ltd., сотрудничеством, основанным на доверии, инновациях и совместном совершенстве.Их опыт в области керамики SSiC и надежные решения постоянно поддерживали наши проекты.

—— Suzhou Huike Technology Co., Ltd.

Мы, в Keda, высоко ценим наше долгосрочное партнерство с Shaanxi Kegu New Material Technology Co., Ltd. Их высококачественные керамические решения SSiC были неотъемлемой частью наших проектов, и мы рассчитываем на дальнейшее сотрудничество и общий успех.

—— Keda Industrial Group Co.,Ltd.

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25 * 20mm Pressureless Sintered SiC Roller

Большие изображения : 25 * 20mm Pressureless Sintered SiC Roller

Подробная информация о продукте:

Место происхождения:	Китай
Фирменное наименование:	KeGu
Номер модели:	25*20 мм спеченный ролик SiC без давления

Оплата и доставка Условия:

Количество мин заказа:	Возможен торг
Цена:	Price is negotiable
Упаковывая детали:	Прочная деревянная коробка для доставки по всему миру.
Время доставки:	Возможен торг
Условия оплаты:	Л/К, Д/А, Д/П, Т/Т, западное соединение

контакт

25 * 20mm Pressureless Sintered SiC Roller

описание

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.

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Контактное лицо: Ms. Yuki

Телефон: 8615517781293

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