Ultra-high Hardness Silicon Carbide Tube Pipe for Energy and Environmental Industrial

Ultra-high Hardness SiC Tube

Product Description

SiC ceramic Tube are tubular ceramic products made primarily from high-purity silicon carbide (SiC) through precision molding and high-temperature sintering processes. As an important structural material, it belongs to the category of superhard materials, possessing low density, self-lubricating properties, and excellent wear resistance. Except for hydrofluoric acid, it hardly reacts with other inorganic acids, exhibiting extremely strong corrosion resistance. Simultaneously, this material demonstrates excellent oxidation resistance and thermal shock resistance at high temperatures, allowing it to be heated to over 1000°C in air, rapidly cooled, and then rapidly heated again without cracking.

Manufacturing Processes

There are various methods for preparing silicon carbide ceramic tubes, each with its own characteristics and applicable scope:

1. Reaction Sintering Method

(1)Principle: carbon powder and silicon powder are mixed and pressed into shape. During high-temperature sintering, silicon and carbon react to form silicon carbide.

(2)Advantages: suitable for large-scale production with lower cost, products have high density and good mechanical properties.

(3)Disadvantages: it is difficult to manufacture products with complex shapes, and may leave unreacted silicon residue.

2. Hot Press Sintering Method

Principle: cilicon carbide powder is sintered under high temperature and high pressure conditions, promoting diffusion and bonding between particles.

(1)Advantages: it is can obtain high-density, high-strength products, suitable for manufacturing precision parts.

(2)Disadvantages: high equipment requirements with lower production efficiency.

3. Isostatic Pressing Method

Principle: Utilizes a liquid medium to transmit pressure, uniformly pressing silicon carbide powder in all directions to form a dense blank, followed by sintering.

(1)Advantages: it is can obtain products with high density and uniform structure, particularly suitable for manufacturing high-quality ceramic tubes.

(2)Disadvantages: High equipment investment and high cost.

4.Slip Casting Method

Principle: Silicon carbide powder is mixed with binders, dispersants, etc., to form a slurry, which is then injected into a mold to solidify and shape. The final product is obtained through drying, debinding, and sintering.

(1)Advantages: it is suitable for manufacturing large or complex-shaped products.

(2)Disadvantages: process is relatively long and difficult to control.

5.Chemical Vapor Deposition (CVD)

Principle: silicon carbide thin film is deposited on the substrate surface through a gaseous chemical reaction, gradually thickening to form a tubular structure.

(1)Advantages: Can produce silicon carbide layers with extremely high purity and good crystallinity, making it very suitable for microelectronic device applications.

(2)Disadvantages: slow growth rate and high cost.

Performance Characteristics

1. Superior Physical Properties

(1)Ultra-high Hardness: as an ultra-hard material, its Mohs hardness is approximately 9.2-9.6, second only to diamond.

(2)Low Density: compared to metallic materials, it has a significant lightweight advantage.

(3)Self-lubricating Properties: low coefficient of friction, suitable for dynamic sealing applications.

2.Excellent Thermal Properties

High Temperature Resistance and Thermal Shock Resistance: it can withstand temperatures above 1000℃ in air and can withstand rapid cooling and rapid heating without cracking.

High Thermal Conductivity: thermal conductivity equivalent to stainless steel; can withstand more than 50 cycles of air cooling from 1000℃ to room temperature without cracking.

High Thermal Efficiency: when used as a heat exchange element, it can save primary energy, with fuel savings exceeding 30%.

3.Excellent Chemical Stability

(1)Strong Corrosion Resistance: Does not react with other inorganic acids except hydrofluoric acid.

(2)Oxidation Resistance: Exhibits good corrosion resistance in oxidizing and acidic media.

4. Structural Advantages:

(1)High Mechanical Strength: robust structure with high mechanical strength.

(2)Excellent Sealing Performance: utilizes a special sealing structure to effectively prevent media leakage; leakage rate is less than 5%.

(3)Long Service Life Design: employs a one-piece molding process, integrating the joint with the pipe body, significantly extending service life.

Applications

Customized Process

 

Comprehend application product information from customers ⇒ Engineers create drawings ⇒ Customers confirms drawings ⇒ After customer confirmation, a quotation is prepared ⇒ Confirm quotation and making sample ⇒ Customers confirm sample ⇒ Deposit payment is made ⇒ Mass production begins ⇒ Shipping and receiving tracking ⇒ Order finish

FAQ

Q1: What products does your company offer?

We specialize in high-performance ceramics such as alumina and silicon nitride, providing insulators, structural components, wear-resistant parts, and customized solutions.

Q2: Can you customize non-standard parts?

Yes. We support processing based on provided drawings and collaborative technical development, offering a full-process service from design to mass production.

Q3: What about accuracy and delivery time?

Standard tolerance ±0.05mm, precision grade ±0.01mm; samples 7-15 days, bulk orders 20-30 days.

Q4: Main application areas?

Power, electronics, machinery, chemical, and aerospace industries.

Q5: Quality assurance measures?

Full-process quality inspection, providing material reports and performance test data, supporting third-party certification and testing.

Q6: Do you provide technical support?

We provide professional support such as material selection consultation, design optimization, and failure analysis.

Why choose us?

1.Customized R&D, rather than standard product adaptation

2.Deep control of materials science：Material Selection Based on Needs，Microstructure Optimization，Batch Consistency

3.Precision machining capability：Flatness can reach 0.001mm, parallelism 0.002mm, and roughness Ra 0.1μm.

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