Alumina Sagger Manufacturer
Alumina Sagger Manufacturer
Description: Mingte manufactures alumina saggers and high alumina ceramic saggers for high-temperature firing applications. Made from premium alumina and corundum materials, our refractory saggers provide excellent thermal shock resistance and durability for lithium battery materials and ceramic processing.
Mingte supplies custom corundum mullite saggers for lithium battery cathode and anode material sintering, including LFP, NCM/NMC, LCO, LMFP, precursor powders, electronic ceramic powders, and advanced material processing. These Custom Kiln Saggers are designed for high-temperature powder calcination and sintering processes where corrosion resistance, thermal shock stability, low contamination, dimensional accuracy, and repeated firing performance are critical.
In lithium battery material production, poor sagger performance may cause powder contamination, lithium salt corrosion, powder sticking, cracking, deformation, uneven sintering, short service life, and frequent replacement. Mingte can customize corundum mullite saggers according to your kiln type, processed material, firing temperature, atmosphere, loading weight, size drawing, surface requirement, and current sagger failure problem.
Send us your powder type, kiln type, working temperature, sagger dimensions, loading weight, current problem, and required quantity. Our technical team will help you evaluate the application and provide a custom quotation.
Product Features & Benefits
|
Feature |
Details |
Customer Benefit |
|
Material Composition |
High-purity corundum-mullite composite |
Excellent thermal shock resistance and chemical inertness |
|
High-Temperature Capability |
Up to 1650°C |
Supports all standard lithium battery sintering processes |
|
Thermal Shock Resistance |
Withstands rapid heating and cooling cycles |
Reduces breakage and production downtime |
|
Chemical Resistance |
Resistant to lithium salts, oxides, and fluxes |
Maintains material purity and avoids contamination |
|
Custom Sizes & Shapes |
Rectangular, square, cylindrical, or tailored dimensions |
Fits your furnace and specific battery material trays |
|
Mechanical Strength |
High compressive and flexural strength |
Supports repeated use under heavy loads |
|
Surface Finish |
Smooth interior surface |
Minimizes sticking and simplifies material handling |
Saggers are designed for long service life, consistent performance, and reduced maintenance in high-demand lithium battery production.
Technical Specifications
|
Specification |
Typical Values |
|
Material |
High-purity corundum-mullite |
|
Operating Temperature |
Up to 1650°C |
|
Thermal Expansion Coefficient |
4–6 × 10^-6 /°C |
|
Thermal Conductivity |
|
|
Mechanical Strength |
Compressive >80 MPa, Flexural >20 MPa |
|
Chemical Composition |
Al2O3 ≥ 70%, SiO2 ≤ 30%, low impurities |
|
Furnace Compatibility |
Shuttle kilns, tunnel kilns, batch furnaces for battery materials |
Why Corundum Mullite Saggers Are Used for Battery Material Sintering
Lithium battery materials are sensitive to contamination, reaction conditions, and firing consistency. During sintering, powders may release lithium compounds, corrosive vapor, or reactive substances that attack the sagger surface. At the same time, repeated firing cycles, rapid temperature changes, and heavy powder loading may cause cracking, warping, or premature failure.
A suitable corundum mullite sagger helps support stable sintering by providing:
- Good resistance to lithium salt corrosion
- Stable performance under repeated firing cycles
- Better thermal shock resistance than many dense high-alumina materials
- Lower contamination risk than ordinary clay-based saggers
- Good mechanical strength under loading conditions
- Custom size and shape for different kiln systems
- Smooth surface options to help reduce powder sticking
Problems We Help Solve in Battery Material Sintering
|
Production Problem |
Possible Cause |
How Mingte Corundum Mullite Saggers Help |
|
Powder contamination |
Impurities in sagger material, surface peeling, chemical reaction with powder |
Uses suitable corundum-mullite ceramic material to reduce contamination risk |
|
Lithium salt corrosion |
Li₂CO₃, LiOH, fluoride, alkali vapor, or reactive powder attack |
Dense ceramic structure and proper material matching improve corrosion resistance |
|
Powder sticking |
Rough surface, molten salt residue, chemical reaction, improper surface finish |
Smooth surface or customized surface treatment helps reduce sticking risk |
|
Cracking during firing |
Fast heating or cooling, thermal shock, uneven loading, poor wall design |
Mullite phase improves thermal shock resistance and repeated cycle stability |
|
Warping or deformation |
High loading weight, thin bottom, unsuitable support, excessive firing temperature |
Custom wall thickness, bottom thickness, and shape design improve load-bearing stability |
|
Uneven sintering |
Poor heat distribution, unsuitable sagger size, improper stacking |
Custom size and wall structure support more consistent firing conditions |
|
Short service life |
Wrong material, severe corrosion, process mismatch, improper handling |
Material and structure can be matched according to powder chemistry and kiln condition |
|
Frequent replacement |
Cracking, corrosion, sticking, or deformation after limited cycles |
Replacement saggers can be optimized based on current failure photos and service records |
Applications by Battery Material
|
Battery Material / Powder Type |
Main Sintering Concerns |
Sagger Requirement |
|
LFP |
Powder sticking, batch consistency, repeated firing cycles |
Thermal shock resistance, stable dimensions, smooth inner surface |
|
NCM / NMC |
Lithium vapor corrosion, contamination control, chemical compatibility |
Dense body, low impurity, corrosion-resistant surface |
|
LCO |
High purity, reaction control, stable sintering |
Low contamination risk, stable ceramic body, smooth surface |
|
LMFP |
Uniform sintering, chemical compatibility, repeated cycle stability |
Custom size, stable structure, corrosion resistance |
|
Cathode Precursor Powders |
Powder support, contamination control, surface reaction |
Smooth surface, low shedding, accurate dimensions |
|
Anode Materials |
Atmosphere matching, temperature control, powder protection |
Need to confirm firing atmosphere and material compatibility |
|
Electronic Ceramic Powders |
High purity, dimensional stability, low contamination |
Low impurity ceramic body, custom shape, smooth surface |
|
Advanced Ceramic Powders |
High-temperature sintering, stable support, repeated use |
High-temperature strength, thermal shock resistance, custom design |
Different battery materials have different requirements for corrosion resistance, purity, thermal stability, and surface performance. Mingte can recommend a suitable sagger structure according to the processed material and firing condition.
Kiln Compatibility
|
Kiln Type |
Sagger Selection Focus |
|
Push Plate Kiln |
Bottom flatness, wear resistance, stacking stability, repeated pushing performance |
|
Roller Kiln |
Weight control, bottom smoothness, deformation resistance, roller contact stability |
|
Tunnel Kiln |
Long firing cycle stability, batch consistency, loading strength |
|
Shuttle Kiln |
Thermal shock resistance, loading strength, flexible batch production |
|
Batch Furnace |
Custom size, small-batch production, flexible loading design |
|
Atmosphere Furnace |
Need to confirm oxidizing, reducing, nitrogen, inert, or other atmosphere compatibility |
|
Laboratory Furnace |
Small-size customization, high purity, accurate dimensions, easy handling |
Corundum mullite saggers can be used in different kiln systems. The correct design should match the kiln structure, firing temperature, atmosphere, loading method, and handling method.
For atmosphere furnace applications, please provide the atmosphere type, such as oxidizing, reducing, nitrogen, inert gas, or special process atmosphere, so that Mingte can evaluate material compatibility.
Send product request
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