Fused Mullite (Al2O3-SiO2)
Glass-furnace and hot-blast-stove refractory brick raw material. Small quantities, prototypes and custom made-to-order specifications are welcome.
40F–325F / blockParticle Size
70–77% Al2O3Composition
Custom Made-to-OrderGrade & Quantity
WorldwideExport Shipping
Fused Mullite — Grades & Specifications
Glass-furnace and hot-blast-stove refractory brick raw material. The options below are typical; specify your target values in the request form and we will confirm availability, lead time and pricing.
| Material | Fused Mullite |
|---|---|
| Chemical formula | Al2O3-SiO2 |
| CAS number | 1302-93-8 |
| Particle size | 0–1mm, 1–3mm, 3–5mm block/granule grades; mesh grades 8/10, 10/36, 30/60, 40F–325F |
| Composition | Al2O3 70–77%, SiO2 22–29%, Fe2O3 ≤0.15% |
| Morphology | Block, granule or powder with a rough, granular surface (electric-fused, then crushed) |
| Appearance | Light brown to gray granular/block material |
| Typical applications | Refractory Brick, Kiln Furniture, Metallurgical Furnace Linings |
Applications by Industry
Refractory BrickGlass-furnace and hot-blast-stove refractory brick raw material.
Kiln FurnitureCeramic kiln furniture and setter material.
Metallurgical Furnace LiningsFurnace lining raw material for steel/nonferrous industries.
Particle Size & Mesh Conversion
Reference for converting between US mesh and microns/millimetres. Figures are nominal sieve openings and may vary slightly by standard.
| Mesh (US) | Micron (µm) | mm | Inch | Remarks |
|---|---|---|---|---|
| 3 | 6730 | 6.730 | 0.2650 | |
| 4 | 4760 | 4.760 | 0.1870 | |
| 5 | 4000 | 4.000 | 0.1570 | |
| 6 | 3360 | 3.360 | 0.1320 | |
| 7 | 2830 | 2.830 | 0.1110 | |
| 8 | 2380 | 2.380 | 0.0937 | |
| 10 | 2000 | 2.000 | 0.0787 | |
| 12 | 1680 | 1.680 | 0.0661 | |
| 14 | 1410 | 1.410 | 0.0555 | |
| 16 | 1190 | 1.190 | 0.0469 | |
| 18 | 1000 | 1.000 | 0.0394 | |
| 20 | 841 | 0.841 | 0.0331 | |
| 25 | 707 | 0.707 | 0.0278 | |
| 30 | 595 | 0.595 | 0.0234 | |
| 35 | 500 | 0.500 | 0.0197 | |
| 40 | 420 | 0.420 | 0.0165 | |
| 45 | 354 | 0.354 | 0.0138 | |
| 50 | 297 | 0.297 | 0.0117 | |
| 60 | 250 | 0.250 | 0.0098 | |
| 70 | 210 | 0.210 | 0.0083 | |
| 80 | 177 | 0.177 | 0.0070 | |
| 100 | 149 | 0.149 | 0.0059 | |
| 120 | 125 | 0.125 | 0.0049 | |
| 140 | 105 | 0.105 | 0.0041 | |
| — | 100 | 0.100 | 0.0039 | Sand |
| 170 | 88 | 0.088 | 0.0035 | |
| 200 | 74 | 0.074 | 0.0029 | |
| — | 70 | 0.070 | 0.0027 | |
| 230 | 63 | 0.063 | 0.0024 | Human hair |
| — | 55 | 0.055 | 0.00217 | |
| 270 | 53 | 0.053 | 0.0021 | |
| — | 50 | 0.050 | 0.00197 | |
| 325 | 44 | 0.044 | 0.0017 | |
| — | 40 | 0.040 | 0.00157 | |
| 400 | 37 | 0.037 | 0.0015 | |
| 550 | 25 | 0.025 | 0.00099 | |
| 625 | 20 | 0.020 | 0.00079 | |
| 1200 | 12 | 0.012 | 0.0005 | |
| 1250 | 10 | 0.010 | 0.000394 | |
| — | 7 | 0.007 | 0.000276 | |
| 2500 | 5 | 0.005 | 0.000197 | |
| 4800 | 3 | 0.003 | 0.000118 | |
| 5000 | 2.5 | 0.0025 | 0.000099 | Bacteria (approx.) |
| 12000 | 1 | 0.001 | 0.0000394 |
Information Required for Quotation
- Grade / purity (e.g. ≥99.95%)
- Particle size / target (µm, or mesh)
- Quantity
- Application environment
- Required delivery country
Lead time depends on grade, particle size, quantity and processing requirements. Export availability can be reviewed based on destination country and material type. A Certificate of Analysis can be provided on request.
Request a Quote or Custom Order
Tell us your grade, particle size and quantity. We typically reply within one business day.
Frequently Asked Questions
What purity / grade options are available for Fused Mullite?
Fused Mullite is offered in the grades listed on this page (Al2O3 70–77%, SiO2 22–29%, Fe2O3 ≤0.15%). Other grades can be reviewed on request depending on your application and quantity.
What particle sizes can you supply for Fused Mullite?
The typical size range supplied is 0–1mm, 1–3mm, 3–5mm block/granule grades; mesh grades 8/10, 10/36, 30/60, 40F–325F. Please specify your target value in the request form and we will confirm availability.
Can Fused Mullite be made to custom specifications?
Yes. Fused Mullite can be produced to order — grade, particle size and packaging can be customized to your specification. Select "Custom Order" in the request form and provide your target values.
What is the minimum order quantity (MOQ)?
Order quantity is flexible and small quantities and prototype requests are welcome. Please state your required quantity in the form for an accurate quotation.
Can you export and ship Fused Mullite internationally?
Yes, export inquiries are welcome. Availability and shipping are reviewed based on destination country, grade and quantity.
Do you provide a Certificate of Analysis (COA) or technical data?
A Certificate of Analysis and technical data can be provided on request for supplied lots.
Related Products
Request a Quote for Fused Mullite
Send us your grade, particle size, quantity and application. We will review availability, quotation and lead time. Small quantities, prototypes and custom made-to-order specifications are welcome.