Silicon Carbide 70/65 Micropowder | SiC Powder For Refractories & Coating

 

 

Silicon Carbide 70/65 Micropowder is a black refractory grade silicon carbide powder used in refractory linings, foundry coatings, furnace materials, ceramic additives and high-temperature industrial applications. Compared with high-purity SiC powder, 70% and 65% silicon carbide micropowder offers a more cost-effective balance between performance and price.

For refractory manufacturers, foundries and ceramic material producers, the key value of SiC powder is not only its SiC content. Buyers also need to check particle size distribution, free carbon, Fe₂O₃, moisture, bulk density and batch stability.

Zhen An supplies black silicon carbide powder in 100 mesh, 200 mesh, 325 mesh and customized particle sizes. Our SiC 70/65 micropowder is supplied in powder form without briquette binders, making it suitable for refractory castables, blast furnace trough materials, coating systems and ceramic formulations.

 

 

he following specifications are reference ranges. Final chemical composition can be adjusted according to actual batch testing and customer requirements.

Grade	SiC Min	Free Carbon Max	Fe₂O₃ Max	Moisture Max	Main Application
Silicon Carbide 70 Micropowder	70%	15%	1.5–2.5%	0.5%	Refractory lining, castables, coatings
Silicon Carbide 65 Micropowder	65%	20%	2.5–3.5%	0.5%	Cost-effective refractory and coating use

For strict refractory or ceramic applications, buyers should confirm SiC content, free carbon, Fe₂O₃, sulfur, phosphorus, moisture and particle size distribution before placing an order.

 

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Silicon carbide micropowder is widely used in refractory and coating systems because of its high hardness, good thermal conductivity, strong erosion resistance and high-temperature stability. In refractory linings and castables, SiC powder can help improve density, reduce material erosion and enhance thermal shock resistance.

Main advantages include:

• Good balance between refractory performance and cost
• Suitable for refractory castables, furnace linings and foundry coatings
• Helps improve erosion resistance in high-temperature environments
• Supports better thermal conductivity in coating and refractory systems
• Available in 100 mesh, 200 mesh, 325 mesh and customized sizes
• Powder form without briquette binder residue
• Suitable for bulk industrial supply

For buyers who do not require high-purity 90%+ SiC powder, silicon carbide 70/65 micropowder can be a practical and economical choice.

 

 

Zhen An supplies silicon carbide micropowder and black silicon carbide flour in different mesh sizes. Customized particle size distribution can also be produced according to buyer requirements.

Product Form	Common Size	Main Use
Fine Powder	100 mesh	Refractory castables, furnace materials
Micropowder	200 mesh	Foundry coatings, refractory coating systems
Ultra Fine Powder	325 mesh	Fine coating, ceramic additives
Customized Powder	As required	Special refractory and ceramic formulations

Common keywords used by buyers include black silicon carbide 200 mesh, black silicon carbide 325 mesh, silicon carbide flour and silicon carbide ultra fine powder for coating.

For coating and refractory production, stable particle size is very important. A consistent particle size distribution helps improve mixing uniformity, coating performance and final material density.

 

 

 

1. Refractory Linings and Castables

Silicon carbide micropowder is used in refractory bricks, castables, ramming mass and furnace lining materials. It can help improve the density, erosion resistance and high-temperature performance of refractory products.

In high-temperature furnace areas, refractory materials are often affected by slag erosion, thermal shock and mechanical wear. Refractory grade silicon carbide can improve the service performance of lining materials under harsh operating conditions.

2. Blast Furnace Trough Materials

In blast furnace troughs, refractory materials need to resist molten iron erosion, slag corrosion and rapid temperature changes. Silicon carbide powder can improve the wear resistance and thermal shock resistance of trough castables.

For this application, buyers usually pay close attention to SiC content, particle size, free carbon, Fe₂O₃ and moisture control.

3. Foundry Coatings

Black silicon carbide flour can be used as an additive or base material in foundry coatings. Its thermal conductivity and high-temperature stability help reduce sand sticking and improve the surface quality of castings.

For foundry coating applications, 200 mesh and 325 mesh silicon carbide powder are commonly selected because they provide better dispersion and coating smoothness.

4. Ceramic Additives

Silicon carbide micropowder can also be used as a ceramic additive to improve thermal shock resistance, wear resistance and high-temperature stability. It is suitable for selected structural ceramics and high-temperature ceramic formulations.

5. Furnace Coating and Repair Materials

In furnace coating and repair systems, SiC powder can improve the compactness and thermal resistance of the material. It is suitable for high-temperature areas where oxidation resistance, abrasion resistance and thermal stability are required.

 

 

High-purity silicon carbide powder is not always necessary for every refractory or coating application. In many industrial refractory systems, buyers care more about cost performance, stable particle size and batch consistency.

Silicon carbide 70/65 micropowder is suitable when:

• The application does not require 90%+ SiC purity
• Cost control is important
• Refractory performance and price need to be balanced
• The material is used in bulk castables, coatings or furnace repair
• Particle size stability is more important than ultra-high purity

Compared with high-purity SiC powder, SiC 70/65 powder can help reduce raw material cost while still providing useful refractory performance in suitable applications.

 

 

For silicon carbide micropowder, quality control should focus on both chemical composition and particle size distribution. Even if the SiC content is correct, unstable mesh size or excessive moisture may affect coating performance and refractory material quality.

Zhen An can provide quality control support, including:

• SiC content testing
• Free carbon testing
• Fe₂O₃ inspection
• Moisture control
• Particle size screening
• COA available before shipment
• Third-party inspection support upon request

If your application requires a specific D50 value, sulfur limit, phosphorus limit or moisture level, please inform us before quotation.

 

 

Standard packing options include:

• 25kg bags
• 1MT jumbo bags
• Jumbo bags with PE liner
• Pallet packing available
• Customized packing according to buyer requirements

Moisture-proof packing is recommended for silicon carbide micropowder, especially for long-distance sea transportation. We support FOB, CFR and CIF trade terms.

For bulk silicon carbide supply, please provide your required grade, mesh size, quantity, destination port and packing method. This will help us provide a faster and more accurate quotation.

 

 

Zhen An supplies silicon carbide, ferrosilicon, silicon metal, cored wire and other ferroalloy materials for global industrial buyers. For silicon carbide 70/65 micropowder, we focus on stable particle size, practical refractory performance and export-ready packing.

Our advantages include:

• Silicon carbide 70/65 micropowder available
• 100 mesh, 200 mesh, 325 mesh and customized sizes
• Powder form without briquette binder residue
• Suitable for refractories, coatings and ceramics
• COA-supported quality control
• Bulk packing for industrial use
• Export support for global buyers

Whether you need SiC powder for refractories, black silicon carbide flour for foundry coatings, or refractory grade silicon carbide for furnace lining materials, we can help recommend a suitable specification according to your application.

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ZHEN AN INTERNATIONAL CO., LIMITED is an enterprise dedicated to silicon carbide (SiC), as well as metallurgical and refractory products, integrating production, processing, sales, and import/export trade.

We are committed to building a professional and dedicated elite team on a global scale, establishing a comprehensive quality control and service system centered around our silicon carbide products. At ZhenAn, we uphold our commitment to providing comprehensive solutions for our customers' production processes by delivering silicon carbide products of the "right quality and quantity."

Our factory covers an area of 30,000 square meters, boasting an annual production and sales volume exceeding 150,000 tons, with a stable monthly supply of 3,000 tons. We are equipped with a complete set of modern production facilities, providing a solid guarantee for the research and development, testing, and quality stability of our silicon carbide products. 

 

 

Q:What is Silicon Carbide 70/65 Micropowder used for?

A:Silicon Carbide 70/65 Micropowder is mainly used in refractory linings, castables, foundry coatings, furnace repair materials and ceramic additives. It helps improve erosion resistance, thermal conductivity and high-temperature stability.

Q:What is the difference between silicon carbide flour and silicon carbide grit?

A:Silicon carbide flour is a fine powder, usually available in 100 mesh, 200 mesh or 325 mesh. It is mainly used in refractories, coatings and ceramics. Silicon carbide grit is coarser and is more commonly used in steelmaking, grinding or abrasive applications.

Q:Why use refractory grade silicon carbide in blast furnace troughs?

A:Refractory grade silicon carbide can improve erosion resistance, slag corrosion resistance and thermal shock resistance in blast furnace trough materials. It helps the refractory lining withstand molten iron, slag and rapid temperature changes.

Q:Can SiC 65 powder replace high-purity SiC powder in coatings?

A:SiC 65 powder can be used in some cost-sensitive coating applications, but it cannot replace high-purity SiC powder in all cases. The decision depends on coating formulation, temperature requirement, surface finish and performance target.

Q:What mesh sizes are available for black silicon carbide powder?

A:Common mesh sizes include 100 mesh, 200 mesh and 325 mesh. Customized particle size distribution can also be supplied according to refractory, coating or ceramic production requirements.

Q:Is silicon carbide micropowder suitable for foundry coatings?

A:Yes. Black silicon carbide micropowder is suitable for selected foundry coating systems. Its thermal conductivity and high-temperature stability can help reduce sand sticking and improve casting surface quality.

Q:What should buyers check before ordering SiC powder?

A:Buyers should check SiC content, free carbon, Fe₂O₃, moisture, sulfur, phosphorus and particle size distribution. For coating or ceramic applications, mesh size and D50 stability are especially important.

Q:Do you provide COA for silicon carbide micropowder?

A:Yes. COA can be provided for each batch. Third-party inspection such as SGS or CCIC can also be arranged upon request before shipment.

 

 

 

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