Silicon Carbide (SIC)
FerrumX is a professional manufacturer and exporter of industrial-grade SiC materials for metallurgy, refractory, and abrasive applications — 120,000 tons annual capacity, 70–99% purity, F8–F1500 grit range.
Silicon Carbide Manufacturer
What Is Silicon Carbide?
Silicon carbide (SiC) is an inorganic non-oxide ceramic material produced by a chemical reaction between silicon oxides (such as quartz sand) and carbonaceous materials (such as petroleum coke or anthracite) under high-temperature conditions of 1,700–2,500 °C in an Acheson resistance furnace.
SiO₂ + 3C → SiC + 2CO↑
SiC has a Vickers hardness of 29 GPa (Mohs 9.5, second only to diamond) and a typical thermal conductivity of approximately 50–100 W/m·K. It also exhibits excellent chemical stability and thermal shock resistance, making it indispensable across multiple industrial sectors:
Abrasives — Grinding, polishing, sandblasting for metals, stainless steel, stone, and glass
Refractories — Tap hole clay, trough & slag runners, slide gate plates, kiln furniture, furnace linings
Metallurgy — Deoxidizer, Si- and C-alloying additive, energy booster in LD/BOF converters
PRODUCT PORTFOLIO
Our Product Categories
From silicon carbide smelting to refractory finished products — FerrumX covers the full value chain of silicon-based industrial materials.
Black
Black Silicon Carbide
70–98%
Abrasive
Refractory
The most widely used SiC type — lower cost, high hardness, ideal for grinding metals and refractory formulations.
Green
Green Silicon Carbide
97–99.5%
Precision
Higher purity, sharper crystals — designed for precision grinding of hard alloys, glass, and semiconductors.
Powder
SiC Micronized Powder
F230–F1500
Sub-µm
Fine powders from 32 µm down to sub-micron — for lapping, polishing, and advanced ceramic formulations.
Grit
SiC Grit Series
F8–F220
FEPA
Macrogrits from 2,000 µm to 45 µm — blasting, grinding, and surface preparation for heavy-duty applications.
Metallurgical
Metallurgical SiC
65–99%
Deoxidizer
Energy Booster
For cast iron foundries and steel mills — Si/C alloying, deoxidation, nucleation, and LD/BOF heat compensation.
Refractory
SiC for Refractories
MI <100ppm
RTP Granules
High-purity SiC with low magnetic iron for tap hole clay, runners, kiln furniture, and blast furnace linings.
Grade and Classifaction
SiC Grades & Classification
α-SiC
β-SiC
Custom
Formation, classification, and properties of SiC grades — from coarse crystalline α-SiC to metallurgical β-SiC.
Abrasives
SiC for Abrasives
Sharp-edged
High cutting
Sharp-edged SiC grains optimized for grinding wheels, sandblasting media, and surface finishing applications.
Properties
Key Properties of Silicon Carbide
SiC’s unique combination of hardness, thermal conductivity, and chemical inertness makes it indispensable across industries.
Vickers Hardness
29 GPa
Mohs 9.5 — second only to diamond
Thermal Conductivity
50–100
W/m·K at room temperature
Max Temperature
1,500 °C
in air; 2,400 °C in inert atmosphere
Density
3.21
g/cm³
Thermal Expansion
5 × 10⁻⁶
/K — excellent thermal shock resistance
Chemical Inertness
Stable
Resists all alkalis and acids
Specific Heat
750
J/kg·K
Wear Resistance
Extremely High
Sharp crystal structure, low friction
Production Capabilities
FerrumX SiC Production Capabilities
Industry-leading production infrastructure: two 40,000 KVA smelting furnaces, five deep-processing lines, and 120,000 tons annual output.
Production Equipment
Our Key Value
Specifications
Silicon Carbide Specifications
Complete chemical composition data for SiC smelting products and processed products.
SiC Smelting Product Indicators
| Grade | SiC (%) | F.C (%) | Fe₂O₃ (%) | H₂O (%) |
|---|---|---|---|---|
| Grade I | ≥98.50 | ≤0.25 | ≤0.30 | ≤0.30 |
| Grade II | ≥88.50 | ≤2.80 | ≤3.00 | ≤0.50 |
| Grade III | ≥70.50 | ≤8.00 | ≤3.50 | ≤1.00 |
SiC Smelting Product Indicators
| Grade | SiC (%) | F.C (%) | Fe₂O₃ (%) | H₂O (%) |
|---|---|---|---|---|
| 99# | ≥99.00 | ≤0.10 | ≤0.10 | ≤0.10 |
| 98# | ≥98.00 | ≤0.25 | ≤0.30 | ≤0.30 |
| 97# | ≥97.00 | ≤0.30 | ≤0.40 | ≤0.30 |
| 95# | ≥95.00 | ≤1.00 | ≤1.00 | ≤0.30 |
| 88# | ≥88.50 | ≤2.80 | ≤3.00 | ≤0.50 |
| 70# | ≥70.50 | ≤8.00 | ≤3.50 | ≤1.00 |
FerrumX Silicon Carbide Purity Grades
| Grade | SiC (%) | F.C (%) | Fe₂O₃ (%) | Application |
|---|---|---|---|---|
| 99# | ≥99.00 | ≤0.10 | ≤0.10 | High-end refractories, semiconductors |
| 98# | ≥98.00 | ≤0.25 | ≤0.30 | Precision abrasives, kiln furniture |
| 97# | ≥97.00 | ≤0.30 | ≤0.40 | Green SiC, advanced ceramics |
| 95# | ≥95.00 | ≤0.60 | ≤1.20 | Standard refractories |
| 90# | ≥90.00 | ≤1.0 | ≤1.2 | Metallurgical deoxidizer |
| 85# | ≥85.00 | ≤2.50 | ≤3.5 | Cast iron preconditioning |
| 80# | ≥80.00 | ≤3–6 | ≤3.5 | BOF energy booster |
| 70# | ≥70.50 | ≤8.00 | ≤3.5 | Metallurgical pellets & briquettes |
| 65# | ≥65.00 | ≤15–20 | ≤3.5 | Cupola furnace additive |
| 60# | ≥60.00 | ≤15–20 | ≤3.5 | Low-cost metallurgical grade |
Macrogrits: F8 – F220 (FerrumX Silicon Carbide)
| Grit No. | Particle Size (µm) | Min. % SiC | Max. % C | Max. % SiO₂ | Max. % Si | Max. % Fe₂O₃ | Bulk Density (g/cm³) |
|---|---|---|---|---|---|---|---|
| F8 | 2,000 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.35–1.43 |
| F10 | 1,700 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.35–1.44 |
| F12 | 1,400 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.41–1.49 |
| F14 | 1,180 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.42–1.50 |
| F16 | 1,000 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.43–1.51 |
| F20 | 850 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.44–1.52 |
| F22 | 710 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.44–1.52 |
| F24 | 600 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.45–1.53 |
| F30 | 500 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.45–1.53 |
| F36 | 425 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.46–1.54 |
| F40 | 355 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.47–1.55 |
| F46 | 300 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.47–1.55 |
| F54 | 250 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.46–1.54 |
| F60 | 212 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.46–1.54 |
| F70 | 180 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.45–1.53 |
| F80 | 150 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.44–1.52 |
| F90 | 125 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.43–1.51 |
| F100 | 106 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.42–1.50 |
| F120 | 90 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.40–1.48 |
| F150 | 63 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.38–1.46 |
| F180 | 53 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.38–1.46 |
| F220 | 45 | 99.0 | 0.40 | 0.40 | 0.50 | 0.02 | 1.36–1.44 |
Microgrits: F230 – F1500 (FerrumX Silicon Carbide)
| Grit No. | Particle Size (µm) | Min. % SiC | Max. % C | Max. % SiO₂ | Max. % Si | Max. % Fe₂O₃ | Loose Pack Density (g/cm³) |
|---|---|---|---|---|---|---|---|
| F230 | 28–32 | 98.6 | 0.40 | 0.20 | 0.20 | 0.08 | 1.27 ± 0.05 |
| F240 | 25–30 | 98.6 | 0.40 | 0.20 | 0.20 | 0.08 | 1.25 ± 0.05 |
| F280 | 22–25 | 98.6 | 0.40 | 0.20 | 0.20 | 0.08 | 1.22 ± 0.08 |
| F320 | 16–20 | 98.6 | 0.40 | 0.20 | 0.20 | 0.08 | 1.17 ± 0.08 |
| F360 | 12–15 | 98.6 | 0.40 | 0.10 | 0.20 | 0.08 | 1.13 ± 0.08 |
| F400 | 8–12 | 99.6 | 0.20 | 0.20 | 0.10 | 0.08 | 1.01 ± 0.08 |
| F500 | 5–8 | 99.6 | 0.20 | 0.20 | 0.10 | 0.08 | 0.95 ± 0.08 |
| F600 | 3–5 | 99.6 | 0.20 | 0.20 | 0.10 | 0.08 | 0.88 ± 0.08 |
| F800 | 2–3 | 99.6 | 0.20 | 0.20 | 0.10 | 0.08 | 0.81 ± 0.08 |
| F1000 | 1–2 | 99.4 | 0.20 | 0.30 | 0.10 | 0.08 | NA |
| F1200 | 0.7–1.5 | 99.4 | 0.20 | 0.30 | 0.10 | 0.08 | NA |
| F1500 | 0.7 (submicron) | 99.4 | 0.20 | 0.30 | 0.10 | 0.08 | NA |
Standard Size Ranges
| Type | Available Sizes |
|---|---|
| Standard splits | 0.1–0.5 / 0.2–0.5 / 0.5–1 / 1–2 / 1–3 / 2–3 / 3–5 (mm) & 6×10 / 7×12 / 10×18 / 14×30 / 18×34 / 34×70 / 36×70 / 80×180 (mesh) |
| Standard blends | 0–0.2 / 0–0.35 / 0–0.5 / 0–1 (mm) & 80F / 50F / 35F / 10F / 6F |
| Standard fines | 0–0.1 / 0–0.06 (mm), 4 µm & 100F / 200F / 325F / 500F / 800F / 1200F / DIN70 / DCF |
Grain Shape Options
| Shape | Characteristics | Best For |
|---|---|---|
| Cubic (blocky) | Higher bulk density (1.40–1.55 g/cm³) | Refractory packing density |
| Sharp-edged (angular) | Better cutting performance | Abrasive & grinding applications |
| Custom blend | Combined properties | Tailored to process requirements |
Applications of Silicon Carbide
SiC serves three primary industrial categories — abrasives, refractories, and metallurgy — with emerging high-tech applications.
Abrasives & Surface Finishing
Refractory Materials
Refractory Materials
High-Performance Ceramics
Power Electronics & Semiconductors
Custom & Specialty Applications
Features & Advantages
Why FerrumX silicon carbide stands out in the global market.
📏
Consistent Particle Size
From coarse grains (F8) to micron powders (F1500), precisely controlled for every process requirement.
🔬
Selected Raw Materials
Low-impurity quartz sand & petroleum coke ensure high purity and uniformity across all grades.
⬡
Sharp & Uniform Crystals
Sharp-edged grain structure improves grinding and polishing efficiency while minimizing workpiece damage.
🔥
Thermally Stable
High-temperature sintered grains retain performance up to 1,500 °C in air and 2,400 °C in inert atmospheres.
♻
Eco-Friendly Manufacturing
Energy and waste are recycled during production — supporting low-carbon and sustainable manufacturing.
📦
Multiple Product Forms
Powders, grains, graded sand, pellets, briquettes, RTP granules — whatever your process requires.
✓
High Batch Consistency
Strict ICP and laser particle size QA ensures batch-to-batch reliability for large-scale production and export.
⚙
Custom Formulations
Co-develop customer-specific SiC grades with dedicated R&D support — purity, size, shape, and bulk density tailored to you.
FAQ
Frequently Asked Questions About Silicon Carbide
Quick answers to the most common questions about SiC material, production, and supply.
Silicon carbide (SiC) is an inorganic non-oxide ceramic material synthesized by reacting quartz sand (SiO₂) with petroleum coke or anthracite (C) at 1,700–2,500 °C in an Acheson resistance furnace. The chemical reaction is: SiO₂ + 3C → SiC + 2CO↑. SiC has a Mohs hardness of 9.5 (second only to diamond), Vickers hardness of 29 GPa, thermal conductivity of 50–100 W/m·K, and retains stability up to 1,500 °C in air and 2,400 °C in inert atmospheres.
Silicon carbide is primarily classified into two types: Black SiC (70–98% purity, lower cost, widely used in metallurgy, refractories, and general abrasives) and Green SiC (97–99.5% purity, sharper crystals, used for precision grinding of hard alloys, glass, and semiconductors). FerrumX also supplies micronized powder (F230–F1500), grit series (F8–F220), metallurgical grade (pellets & briquettes), and refractory grade (with controlled magnetic iron content <100 ppm).
Silicon carbide is produced using the Acheson process: quartz sand and petroleum coke are heated to 1,700–2,500 °C in a large resistance furnace. Inside, a graphite core heats the surrounding raw materials, forming cylindrical SiC ingots. The ingot layers from inside out: α-SiC (highest purity, coarse crystalline), β-SiC (metallurgical grade), and unreacted material on the outside. FerrumX operates two 40,000 KVA smelting furnaces with an annual capacity of 120,000 tons, plus five deep-processing lines for crushing, milling, and spray granulation.
FerrumX supplies SiC in FEPA-standard macrogrits (F8–F220, particle sizes 2,000–45 µm) and microgrits (F230–F1500, particle sizes 32–0.7 µm). Bulk density for macrogrits ranges from 1.35–1.55 g/cm³ depending on grit number. We also offer JIS and ANSI equivalent sizes, standard splits (0.1–5 mm / 6×10–80×180 mesh), blends (0–1 mm / 10F–80F), and fines (0–0.06 mm / 100F–1200F). Custom particle size distributions are available on request.
FerrumX offers SiC in the following purity grades: 99% (F.C. ≤0.10%, Fe₂O₃ ≤0.10%), 98% (F.C. ≤0.25%, Fe₂O₃ ≤0.30%), 97% (F.C. ≤0.30%, Fe₂O₃ ≤0.40%), 95% (F.C. ≤0.60%, Fe₂O₃ ≤1.20%), 90% (F.C. ≤1.0%, Fe₂O₃ ≤1.2%), 88% (F.C. ≤2.80%, Fe₂O₃ ≤3.00%), 85% (F.C. ≤2.50%, Fe₂O₃ ≤3.5%), 80% (F.C. ≤3–6%, Fe₂O₃ ≤3.5%), 75/70% (F.C. ≤15–20%, Fe₂O₃ ≤3.5%), and 65/60% grades for metallurgical applications.
Silicon carbide has three primary industrial application categories: (1) Abrasives — grinding, polishing, sandblasting of metals, stainless steel, stone, and glass; (2) Refractories — tap hole clay, trough & slag runners, slide gate plates, kiln furniture, blast furnace linings, and mortar; (3) Metallurgy — deoxidizer and Si/C-alloying additive in steelmaking and cast iron production, energy booster in LD/BOF converters. SiC is also used in high-performance ceramics, semiconductor power devices, thermal management substrates, and EV power modules.
Yes. FerrumX can produce SiC grains in cubic (blocky) or sharp-edged (angular) form depending on customer requirements. Cubic grains offer higher bulk density (1.40–1.55 g/cm³) and are preferred for refractory packing density, while sharp-edged grains provide better cutting performance for abrasive applications. Custom blends of both shapes are also available.
FerrumX offers free samples of 1–5 kg for all SiC grades and grit sizes, excluding shipping costs. To request a sample, contact us via the form on this page or email our sales team. Samples are typically dispatched within 3–5 business days with full analytical certificates (ICP chemical analysis, laser particle size distribution). Custom formulations can also be sampled before committing to bulk orders.
