Silicon Carbide Brick

What is Silicon Carbide Brick? Definition & Key Traits

 

Silicon Carbide (SiC) Brick is a high-performance refractory material with SiC as the main raw material (content 72-99%, Mohs hardness 9). It is manufactured via batching, mixing, molding, and sintering, with different bonding systems to adapt to perse industrial working conditions. It’s renowned for excellent wear resistance, corrosion resistance, and high-temperature strength—ideal for harsh high-temp, high-abrasion environments.

 

Core Traits (With Test Standard, Plain Explanation & User Value)

 

① High Wear Resistance: Wear Index ≤0.05g/cm² (ASTM C704 Test). It is 5-8 times more wear-resistant than ordinary refractory bricks. Plain Explanation: It can withstand long-term friction from dust, slag, and molten materials without rapid wear. User Value: Reduces maintenance frequency and downtime, lowering overall production costs.

 

② Strong Corrosion Resistance: Stable to acidic/neutral slag, and the Si3N4-bonded type has slight resistance to alkaline slag. Plain Explanation: It won’t be easily corroded by chemical media in smelting or incineration processes. User Value: Adapts to complex smelting/incineration environments, extending service life.

 

③ Excellent Thermal Shock Stability: ≥30-40 thermal shock cycles (1100℃ water quenching, ASTM C1171). Plain Explanation: It won’t crack when the temperature changes sharply (e.g., from 1100℃ to room temperature). User Value: Avoids cracking due to frequent temperature swings, ensuring equipment operation stability.

 

④ High Thermal Conductivity: 6-16 W/(m·K) at 1200℃ (ASTM C177). Plain Explanation: It transfers heat quickly, unlike traditional insulation bricks that block heat. User Value: Accelerates heat transfer, improves energy efficiency, and reduces fuel consumption.

 

⑤ Low Thermal Expansion Coefficient: 4.5-5.5×10⁻⁶/℃ (20-1000℃). Plain Explanation: It won’t expand or shrink significantly when heated or cooled. User Value: Reduces structural deformation at high temp, avoiding gaps between bricks.

 

Key Bonding Systems (Plain Explanation)

 

The bonding system determines the performance of silicon carbide bricks. Here’s a simple breakdown:

 

• Clay Bonding: Cost-effective, suitable for medium-temp (≤1400℃) wear-resistant scenes. Ideal for small-batch or cost-sensitive projects.

   

• Si3N4 Bonding: High strength & corrosion resistance, ideal for harsh high-temp environments (e.g., blast furnaces). It forms a dense structure to resist slag penetration.

   

• Sialon Bonding: Balances wear resistance and thermal shock, specifically designed for the metallurgical industry (e.g., non-ferrous smelting kilns).

   

• Recrystallization: Ultra-high SiC content (≥98%), for extreme high-temp (≤1800℃) scenes. It has excellent high-temperature stability but higher cost.

   

Hot-Sale Silicon Carbide Brick Types & Technical Data

 

Type Overview (Plain Explanation)

 

① Oxide Bonded SiC Brick: SiC≥85%, cost-effective. It’s the most popular choice for medium-temp (≤1500℃) wear-resistant scenes, such as boiler nozzles, cyclone separators, and coal mill linings.

 

② Corundum-SiC Brick: SiC≥70%, Al₂O₃≥20%. It combines the wear resistance of SiC and the corrosion resistance of corundum, making it ideal for aluminum melting furnace linings and flow channels.

 

③ Mullite-SiC Brick: SiC≥65%, Al₂O₃≥20%. It has excellent thermal shock resistance, suitable for waste incinerator linings, ceramic kiln wear-resistant strips, and other scenes with frequent temperature changes.

 

④ Alumina-SiC Brick: SiC≥20%, Al₂O₃≥55%. It balances performance and cost, widely used in general high-temp industrial kilns, such as cement kiln transition zones and glass furnace insulation layers.

 

⑤ Si3N4 Bonded SiC Brick: SiC≥72%, Si3N4≥19%. It has ultra-high strength and corrosion resistance, specially designed for blast furnace secondary tuyere bricks, iron trough linings, and other harsh working conditions.

 

Technical Parameters Table

 

Silicon Carbide Brick Type	SiC Content (%)	Bulk Density (g/cm³)	Apparent Porosity (%)	Cold Compression Strength (Mpa)	Refractoriness Under Load (0.2Mpa,0.6%)	Thermal Conductivity (W/(m・K),1200℃)	Thermal Shock Cycles (1100℃ Water Quench)	Test Standard
Oxide Bonded SiC Brick	≥85	≥2.5	≤18	≥100	≥1700	13.2	≥40	ASTM/ISO
Corundum-SiC Brick	≥70	≥2.6	≤20	≥100	≥1700	9-10	≥30	ASTM/ISO
Mullite-SiC Brick	≥65	≥2.3	≤20	≥80	≥1650	12	≥40	ASTM/ISO
Alumina-SiC Brick	≥20	≥2.5	≤22	≥80	≥1550	6-8	≥30	ASTM/ISO
Si3N4 Bonded SiC Brick	≥72	≥2.65-2.7	≤14-18	≥200	≥1600	16	≥30	ASTM/ISO

Precise Application Scenarios

 

Silicon carbide bricks are widely used in metallurgy, power, waste treatment, ceramic, and glass industries. Below is the detailed matching of "industry + equipment + part + working condition pain point + recommended type":

 

① Metallurgical Industry

 

Typical Equipment & Parts: Aluminum melting furnaces (lining/flow channel), blast furnaces (secondary tuyere bricks), non-ferrous smelting kilns (wear-resistant layers), iron troughs

 

Working Condition Pain Points: High temp (1400-1600℃), molten metal/slag abrasion, acid corrosion, frequent temperature changes

 

Recommended SiC Brick Type: Corundum-SiC Brick (aluminum melting furnace lining/flow channel), Si3N4 Bonded SiC Brick (blast furnace secondary tuyere bricks/iron troughs)

 

Actual Value: Extends lining service life by 1.5-2 times compared to ordinary refractory bricks; reduces aluminum melting furnace maintenance from 4 times/year to 1-2 times/year.

 

② Power Industry

 

Typical Equipment & Parts: Boiler combustion chamber nozzles, thermal power plant cyclone separators, coal mill linings, flue gas ducts

 

Working Condition Pain Points: High temp (1200-1400℃), flue gas abrasion, dust impact, long-term continuous operation

 

Recommended SiC Brick Type: Oxide Bonded SiC Brick

 

Actual Value: Reduces nozzle replacement frequency from 3 months to 12 months; cyclone separator service life extended to 24+ months, saving maintenance costs by 60%.

 

③ Waste Treatment Industry

 

Typical Equipment & Parts: Waste incinerator linings, hazardous waste treatment kilns, garbage pyrolysis furnaces

 

Working Condition Pain Points: Complex medium (acid/alkaline corrosion), frequent temperature swings (800-1200℃), toxic gas erosion

 

Recommended SiC Brick Type: Mullite-SiC Brick

 

Actual Value: Resists corrosion from complex media, maintains lining integrity for 24+ months; reduces downtime caused by lining damage by 70%.

 

④ Other Industries (Ceramic/Glass)

 

Typical Equipment & Parts: Ceramic kiln wear-resistant strips, glass melting furnace overflow channels, ceramic roller kilns

 

Working Condition Pain Points: High temp (1300-1500℃), material friction, slight acid corrosion

 

Recommended SiC Brick Type: Alumina-SiC Brick, Mullite-SiC Brick

 

Actual Value: Improves equipment operation stability; ceramic kiln wear-resistant strips service life extended to 18 months, reducing production interruption times.

 

Core Advantages of Our Silicon Carbide Brick

 

① Premium Raw Material & Strict Quality Control

 

Data: We use high-purity SiC raw material (SiC≥99% for recrystallized type); implement 3-step strict inspection (raw material screening→in-production sampling→finished product testing); 100% pass rate of ASTM/ISO tests.

 

Case: We provide raw material purity inspection reports for every batch, which have been accepted by European and American customers, ensuring smooth customs clearance.

 

User Value: Stable product quality, avoids risks of equipment failure caused by inferior refractory materials; meets international export requirements, eliminating customs clearance risks.

 

② Superior Wear & Corrosion Resistance, Longer Service Life

 

Data: Wear Index ≤0.05g/cm²; weight loss ≤3% after 72h acid/alkaline immersion (ASTM C267 Test).

 

Case: A Brazilian aluminum plant used our Corundum-SiC Brick for melting furnace lining. The service life reached 28 months, compared to 12 months of the previous supplier’s products.

 

User Value: Reduces maintenance frequency and downtime, lowers total cost of ownership (TCO) by 30-40%.

 

③ 100% Factory Price & Flexible MOQ

 

Data: No middlemen, our price is 15-30% lower than distributors; MOQ 100pcs (small-batch trial order acceptable for new customers).

 

User Value: Lowers procurement cost significantly; small-batch trial orders allow customers to test product performance before large-scale purchase, reducing investment risks.

 

④ Fast Delivery & Comprehensive Service

 

Data: In-stock products delivered in 7-15 days; customized products in 25-45 days; 24-hour technical support via email, WhatsApp, and Skype.

 

Case: A German waste treatment company had an emergency maintenance need. We delivered 500pcs Mullite-SiC Brick in 12 days, ensuring the company resumed production on time.

 

User Value: Shortens supply cycle, ensures production continuity; timely technical support solves use and installation problems quickly.

 

Why Choose Us as Your Silicon Carbide Brick Supplier?

 

① Professional Factory Strength

 

• 18+ years of refractory manufacturing experience, focusing on silicon carbide brick R&D and production.

 

• 3 production bases (total area 60,000㎡), annual output 8000+ tons of silicon carbide bricks, capable of meeting large-order needs.

 

• Advanced equipment: Automatic batching systems, high-temperature sintering kilns (max temp 1800℃), precision testing instruments (ASTM-compliant), ensuring product consistency and quality.

 

② Authoritative Certifications

 

• ISO 9001 Quality Management System Certification.

 

• ASTM/ISO Product Conformity Certification, meeting international industrial standards.

 

• Export Qualification Certification; provide third-party quality inspection reports (SGS/BV) on request.

 

Global Cooperative Cases & Customer Feedback

 

Case 1: Brazilian Aluminum Plant – Annual order 1200 tons, cooperative for 3 years, zero quality complaints. We provide customized Corundum-SiC Brick according to their aluminum melting furnace working conditions.

 

Case 2: German Waste Treatment Company – Emergency order 500pcs Mullite-SiC Brick, delivered in 12 days. Our technical team provided on-site installation guidance, ensuring smooth use.

 

Customer Feedback: “The silicon carbide bricks have stable performance, and the after-sales service is timely. We have extended the cooperation for 3 years, and they are our most trusted refractory supplier.” – Mr. Miller, German Waste Treatment Company Procurement Manager

 

Full-Process Service Guarantee

 

Pre-sales: Free technical assessment based on your working conditions (temperature, medium, equipment size), customized product recommendation and solution design.

 

In-sales: Real-time production progress tracking (provide photos/videos weekly); detailed quality inspection report provided before delivery.

 

After-sales: 1-year quality guarantee; free replacement for defective products caused by quality issues; on-site technical support for large projects (≥500 tons).

 

Procurement Guide & FAQ

 

Procurement Guide

 

• MOQ: 100pcs (small-batch trial order acceptable for new customers).

   

• Price & Payment Terms: Factory direct price; Payment methods: T/T (30% deposit, 70% against B/L), L/C, Western Union (for small orders).

   

• Delivery Time: 7-15 days for in-stock products; 25-45 days for customized products (depends on quantity and specifications).

   

• Packaging & Shipping: Standard export wooden cases/pallets (moisture-proof and shock-proof); Shipping by sea (FOB/CIF); Ports: Qingdao/Shanghai, China. Door-to-door delivery is available on request.

   

• Quality Assurance: 1-year quality guarantee; free sample available (customer bears shipping cost); third-party inspection (SGS/BV) available at customer’s expense.

   

FAQ

 

Q1: What’s the difference between Si3N4 bonded and oxide bonded SiC bricks?

 

A: Si3N4 bonded type has higher strength (≥200Mpa) and corrosion resistance, suitable for harsh high-temp scenes (e.g., blast furnaces, iron troughs); oxide bonded type is cost-effective, for medium-temp (≤1500℃) wear-resistant scenes (e.g., boiler nozzles, cyclone separators).

 

Q2: Can you provide customized silicon carbide bricks?

 

A: Yes! We can customize size (any dimension), SiC content (20-99%), bonding system, and performance according to your specific working conditions (temperature, medium, equipment size). Sample development takes 7-10 days.

 

Q3: How to store silicon carbide bricks?

 

A: Keep in dry, well-ventilated areas with relative humidity <60% to avoid moisture affecting performance; avoid collision during storage to prevent edge chipping; do not stack more than 5 layers.

 

Q4: Do you provide on-site installation guidance?

 

A: Yes! On-site technical guidance is available for large projects (≥500 tons) at a reasonable cost; free detailed installation manual (with diagrams) is provided for all customers. Our 24-hour technical team can also answer installation questions online.

 

Q5: How to confirm the quality before placing a large order?

 

A: We provide free samples (1-3pcs) for quality testing; you can also arrange third-party inspection (SGS/BV) at our factory. We also share test reports, production videos, and customer cases for your reference.

 

Get Your Silicon Carbide Brick Solution Now!

 

Main CTA: Get Your Free Quote & Technical Datasheet Now! – Fill in the form below, and our technical team will reply with a customized solution within 24 hours.

 

Secondary CTA:

 

• Apply for Free Sample (1-3pcs, shipping cost borne by customer)

 

• Contact Our Technical Expert (24-hour online)