Sintered Mullite M45
SEPPE Sintered Mullite M45 is a low-alkali alumina-silica refractory raw material used in refractory castables, shaped refractories, ceramic bodies, kiln furniture and high-temperature industrial lining systems. It is produced from selected mullite-bearing ores through high-temperature processing and screening, providing stable chemistry, hot strength, resistance to spalling and low thermal conductivity.
Al2O3 45.0% typical
Fe2O3 1.5% max
Bulk density 2.55 g/cm3 min
Moisture below 0.5%
M45 Chemistry Snapshot
Typical oxide composition from SEPPE specification.
Low alkali
Product Overview
Sintered Mullite M45 is an economical mullite grade with balanced alumina and silica composition. Compared with higher alumina mullite grades, M45 provides a practical balance of thermal shock resistance, refractoriness and cost efficiency for refractory formulations where very high alumina content is not required.
Its low alkali content helps reduce low-melting phases in refractory systems, supporting stable service performance in castables, bricks, ramming mixes, ceramic rollers, kiln furniture and other high-temperature products.
M45 Visual Selection Guide
Alumina Content Position
M45 provides an economical 45% alumina option for refractory formulations requiring balanced performance and cost control.
M45 grade view
Low Alkali & Impurity Control
Key control values to review when confirming M45 specification and batch COA.
Control view
These items help customers quickly identify impurity and moisture limits. Exact purchasing decisions should follow the M45 TDS and batch COA.
Key Features
Low Alkali Impurities
Na2O and K2O are controlled at low levels, helping improve high-temperature stability.
Resistance to Spalling
Mullite composition supports good thermal shock resistance in repeated heating and cooling conditions.
Stable Grain Size Supply
Available in sand, aggregate and powder sizes for castables, bricks and ceramic applications.
Cost-effective M45 Grade
Suitable for refractory systems requiring mullite performance with controlled material cost.
Technical Data
Al2O3
45.0% / 44.0% min
Typical / minimum
Fe2O3
1.3% / 1.5% max
Iron control
Na2O / K2O
0.07% / 0.07%
Low alkali
MgO / CaO
0.02% / 0.05%
Minor oxides
Bulk Density
2.55 g/cm3 min
Dense sintered material
Moisture
<0.5%
Dry shipment control
Regular Sizes
Common Granules
0.1-0.3 / 0.3-0.8 / 0.5-1.0 mm
0.7-1.5 mm / 2-5 mm
Powder & Mesh
30-60 mesh
-200 mesh / -325 mesh
Additional TDS Ranges
0.18-0.3 mm / 0.18-0.5 mm
Custom PSD on request
Sizes are grouped for quick reading. Customized particle size distribution can be discussed according to refractory formulation, casting process or ceramic production requirements.
Download M45 TDS
Applications
Castables
Refractory castables and low-cement castables
Shaped Refractories
Mullite refractory bricks and shaped products
Ceramics
Ceramic kiln furniture and ceramic bodies
Foundry
Foundry, precision casting and high-temperature filler systems
Packing and Storage
Standard packing is 1.0-1.5 MT big jumbo bag. Store the material under dry conditions and avoid contamination during handling and transportation.
FAQ
? What is Sintered Mullite M45 used for?
It is used in refractory castables, mullite bricks, ceramic bodies, kiln furniture, foundry materials and high-temperature filler systems.
? Can SEPPE provide TDS and COA for M45?
Yes. SEPPE can provide the M45 technical data sheet, batch COA and particle size information for order confirmation.
? Can SEPPE provide customized particle sizes?
Yes. Standard sizes and customized particle size distribution can be discussed according to application and formulation requirements.
Need Sintered Mullite M45 Specifications?
Contact SEPPE for TDS, COA, particle size selection, samples, packaging and bulk order support.
Request a Quote Download TDS
