Product Code : CE-Al6O13Si2-NN-CU
Mullite or porcelainite is a rare silicate mineral formed during contact metamorphism of clay minerals. Mullite has excellent thermal shock resistance and dielectric strength, making it ideal for electronic components for manufacturing purposes. It can form two stoichiometric forms: 3Al2O32SiO2 or 2Al2O3 SiO2. Unusually, mullite has no charge-balancing cations present. As a result, there are three different aluminium sites: two distorted tetrahedral and one octahedral. Mullite was first described in 1924 for an occurrence on the Isle of Mull, Scotland. It occurs as argillaceous inclusions in volcanic rocks in the Isle of Mull, inclusions in sillimanite within a tonalite at Val Sissone, Italy and with emerylike rocks in Argyllshire, Scotland
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Product Information
Mullite or porcelainite is a rare silicate mineral formed during contact metamorphism of clay minerals. Mullite has excellent thermal shock resistance and dielectric strength, making it ideal for electronic components for manufacturing purposes. It can form two stoichiometric forms: 3Al2O32SiO2 or 2Al2O3 SiO2. Unusually, mullite has no charge-balancing cations present. As a result, there are three different aluminium sites: two distorted tetrahedral and one octahedral. Mullite was first described in 1924 for an occurrence on the Isle of Mull, Scotland. It occurs as argillaceous inclusions in volcanic rocks in the Isle of Mull, inclusions in sillimanite within a tonalite at Val Sissone, Italy and with emerylike rocks in Argyllshire, Scotland
Synonyms
Aluminum silicate, andalusite, kyanite, sillimanite, aluminosilicate, aluminum doped silica, alumina-silica, silicon aluminum oxide, silicon aluminate, Aluminum Oxide/Silicon Oxide; Mullite; hexaaluminumdioxosilane; oxo-oxoalumanyloxy-alumane, Mullite-alpha; Cerabeads 1700, 1260518-72-6, 142844-00-6, 55964-99-3, Al2SiO3
Fused Mullite Specification
Size：customized
Purity: 99%(2N), 99.9%(3N), 99.99%(4N), 99.999%(5N).
Per your request or drawing
We can customized as required
Properties（Theoretical）
| Compound Formula | Al6O13Si2 |
| Molecular Weight | 426.052432 |
| Appearance | crystalline |
| Flexural Strength, MOR (20 °C) | 45 - 170MPa |
| Fracture Toughness, KIc | 2MPa m1/2 |
| Melting Point | 1810 °C |
| Density | 2.7 to 3.0 g/cm3 |
| Thermal Conductivity (20 °C) | 4W/m K |
| Solubility in H2O | 0.07 g/l at 20 °C - insoluble |
| Coefficient of Thermal Expansion | 4.0 - 5.0x 10-6/°C |
| Electrical Resistivity | 10 to 11 10x Ω-m |
| Poisson's Ratio | 0.25 |
| Specific Heat | 950 J/kg-K |
| Tensile Strength | 160 MPa (Ultimate) |
| Thermal Conductivity | 3.5 to 11 W/m-K |
| Maximum Use Temperature | 1700°C |
| Dielectric Strength (6.35mm) | 9.8 - 10.0ac-kV/mm |
| Dielectric Loss (tan δ) | 0.002(1MHz, 25 °C) |
| Thermal Expansion | 5.8 µm/m-K |
| Young's Modulus | 110 to 170 GPa |
| Exact Mass | 425.776975 |
| Monoisotopic Mass | 425.776975 |
| Volume Resistivity (25°C) | 1010 to 1014Ω-cm |
| Mullite phase 3Al2O3 2SiO2 (%) | ≥95 |
| Glass phase (%) | ≤5 |
Chemical Composition
| Chemical Composition (%) | Guaranteed value | Typical value |
| Al2O3 | 70-77 | 75.3 |
| SiO2 | 22-29 | 24.08 |
| Fe2O3 | ≤0.1 | 0.05 |
| R2O3 | ≤0.5 | 0.18 |
| RO | ≤0.3 | 0.28 |
Chemical Composition
| Chemical Composition (%) | Guaranteed value |
| Al2O3 | 68-74 |
| SiO2 | 25-28 |
| Fe2O3 | ≤0.1 |
| R2O3 | ≤0.5 |
| RO | ≤0.3 |
Applications of Mullite
Ceramic tubes
Metal foundry filters
Mullite morphology is important for its application. In this case, there are two common morphologies for mullite. One is a platelet shape with low aspect ratio and the second is a needle shape with high aspect ratio. If the needle shape mullite can form in a ceramic body during sintering, it has an effect on both the mechanical and physical properties by increasing the mechanical strength and thermal shock resistance. The most important condition relates to ceramic chemical composition. If the silica and alumina ratio with low basic materials such as sodium and calcium is adjusted, the needle shape mullite forms at about 1,400 °C and the needles will interlock. This mechanical interlocking contributes to the high mechanical strength of porcelain.
Recent research indicates that a synthetic analogue of mullite can be an effective replacement for platinum in diesel engines for exhaust management
Fused Mullite
Fused Mullite is produced by electric furnace fusion of high purity alumina and high purity silica.
Fused Mullite is a needle-like alumina-silica grain that has great features including:
· Low conductivity
· Excellent thermal shock resistance
· Excellent resistance to deformation under loadFused Mullite is used in applications such as refractories for glass and steel industries, kiln furniture, investment casting as shell building materials, spark plug bodies, and many other applications.
Packing of Fused Mullite
Standard Packing:
Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes Special package is available on request.
ATTs’ Mullite is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.
Chemical Identifiers
| Linear Formula | 3Al2O3 • 2SiO2 |
| CAS | 1302-93-8 |
| MDL Number | MFCD00077645 |
| EC No. | 215-113-2 |
| Beilstein/Reaxys No. | N/A |
| Pubchem CID | 56841936 |
| IUPAC Name | dioxosilane; oxo(oxoalumanyloxy)alumane |
| SMILES | O=[Al]O[Al]=O.O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O |
| InchI Identifier | InChI=1S/6Al.2O2Si.9O/c;;;;;;2*1-3-2;;;;;;;;; |
| InchI Key | KZHJGOXRZJKJNY-UHFFFAOYSA-N |
