High Refractory Corundum Mullite Sagger Customizable Size For Lithium Battery

Corundum-mullite saggers are high-temperature bearing containers specially designed for tunnel kilns, pusher kilns and shuttle kilns. Composited with corundum and mullite crystalline phases, they can withstand high temperatures ranging from 1400℃ to 1650℃. Featuring excellent thermal shock resistance, low impurity precipitation, and strong resistance to erosion by acid-base powder, they isolate flue gas inside kilns to prevent sintered materials from contamination, oxidation and adhesion. They act as core kiln furniture for high-temperature calcination and co-firing of powder and ceramic parts.

Applicable materials: High-nickel ternary materials NCM811/NCM622, lithium cobalt oxide, lithium manganate, lithium iron phosphate precursors

Process scenarios:

• Continuous sintering in roller kilns, batch calcination in pusher kilns
• High-temperature synthesis under oxidizing atmosphere; the powder is strongly alkaline and highly corrosive to kiln furniture
• Core advantages: Low iron content avoids contamination of lithium battery materials; no cracking after repeated temperature cycles; service life reaches over 100 thermal cycles.

Applicable products: Multi-layer ceramic capacitors (MLCC), alumina ceramic substrates, aluminum nitride/silicon nitride semiconductor substrates, piezoelectric ceramics, resistor ceramics

Process scenarios:

• Co-firing of nickel electrodes, high-temperature densification annealing of green bodies
• Extremely strict requirements on sagger flatness, dimensional accuracy and no slag shedding to avoid pinholes and color difference defects on ceramic components
• Operating temperature range: 1350℃~1600℃; frequent rapid heating and cooling cycles rely on the outstanding thermal shock stability of corundum-mullite saggers.

Applicable materials: Strontium/barium ferrite permanent magnets, manganese-zinc soft ferrites, rare earth magnetic powder

Process scenarios: Pre-calcination of powder, high-temperature sintering of magnetic blanks. The powder rubs against sagger inner walls for a long time, requiring high wear resistance and resistance to alkali metal vapor erosion. Compared with ordinary high-alumina saggers, material loss is reduced by 40%.

Applicable materials: Rare earth oxides, phosphor powder, long afterglow luminous powder, nano inorganic powder

Scenarios: High-purity powder synthesis. Strict control of impurity precipitation from saggers to avoid failure of powder hue and luminescence performance. Mostly used for small-batch precision firing in intermittent shuttle kilns.

Applicable products: Zirconia ceramics, alumina wear-resistant parts, dental zirconia blanks, ceramic cutting tools, ceramic valves

Process: Pressureless sintering at 1450℃~1650℃, integrated degreasing and firing. Small customized precision saggers are adopted in the dental industry for single-piece firing of dental ceramic blanks.

Applicable materials: Tungsten-cobalt cemented carbide, cermet powder, pressed metal powder blanks

Advantages: Resist penetration of molten metals, maintain stable shape at high temperature, compatible with both oxidizing and weak reducing atmospheres; reduce alloy impurity and bulging defects.

1. Glaze firing of high-end daily-use ceramics and art ceramics, isolating kiln smoke to ensure smooth glaze surface
2. Small square saggers for laboratory muffle furnaces and tube furnaces, used for trial calcination of new material formulas
3. High-temperature decomposition and synthesis of chemical inorganic powders (barium carbonate, strontium carbonate, cobalt oxide, etc.)

1. Continuous roller tunnel kilns: Mass production of lithium batteries and MLCCs, standard rectangular stackable saggers
2. Pusher kilns: Long-line production of magnetic and ternary materials, multi-layer stacking design
3. Intermittent shuttle kilns: Small-batch production of rare earth materials, dental ceramics and special parts, customizable sizes
4. Laboratory high-temperature electric furnaces: Mini square saggers with/without covers for R&D sample firing

1. Isolate impurities from kilns to guarantee sintered material purity and greatly boost finished product yield
2. Mullite phase buffers thermal stress, preventing cracking after continuous thermal cycles and lowering kiln furniture replacement costs
3. Dense structure provides strong resistance to acid-base powder erosion and abrasion, suitable for highly corrosive materials in lithium battery and electronic ceramic industries
4. Customizable sizes, lidded/lidless styles and clamping stacking structures to fit automated kiln production lines

We are aimed to improve R&D and production process and equipment. Moreover, we cooperate with famous university such like Liaoning University of Science and Technology, Beijing University of Science and Technology.

We have many professional equipment to test and check raw material and products.

Our company is a manufacturer of fire-poof kiln furniture and technical ceramics with well-equipped testing facilities and strong technical force. With a wide range, good quality, reasonable prices and stylish designs, our products are extensively used in magnetic material, electronic ceramics, Lithium battery materials sintring, trusted by users and can meet continuously changing economic and social needs. Since the very beginning of establishment, our company has been adhering to the guideline of "Innovation, enterprising, down-to-earth working attitude and wholehearted service to customers", based on quality and credit. Our company is always ready to provide high quality products to customers at home and abroad. We welcome new and old customers from all walks of life to contact us for future business relationships and mutual success!

1. who are we?