高密度焼結アルミナ
Dense fused alumina is produced by electrically melting high-purity aluminum oxide at temperatures exceeding 2000°C, yielding a exceptionally hard, dense, and wear-resistant material. Its superior hardness, low porosity, and outstanding thermal stability make it the preferred choice for high-performance abrasives, precision refractories, and heavy-duty industrial grinding applications.
What Is Dense fused alumina?
Dense fused alumina — also known as dense fused corundum — is a premium grade of aluminum oxide produced through the electric arc fusion of high-purity bauxite or calcined alumina at temperatures exceeding 2000°C. Under these extreme melting conditions, the aluminum oxide fully liquefies and recrystallizes upon cooling into a highly dense, low-porosity structure with a well-developed corundum crystalline phase.
What distinguishes dense fused alumina from standard white or brown fused alumina is its significantly reduced porosity and higher bulk density. This is achieved through careful raw material selection, precise furnace temperature control, and optimized cooling rates — all of which contribute to a tighter, more consolidated grain structure. The result is an alumina material that combines exceptional hardness, outstanding mechanical strength, and superior resistance to thermal shock and chemical attack, making it one of the most reliable high-performance alumina grades available for demanding industrial environments.
Why Choose Dense Fused Alumina?
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Exceptional Hardness & Wear Resistance : With a Mohs hardness rating of 9, dense fused alumina delivers outstanding abrasion resistance, making it ideal for grinding wheels, cutting tools, and surface finishing applications where long service life is critical.
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Low Porosity for Superior Structural Integrity: Its uniquely dense, low-porosity grain structure minimizes material absorption and crack propagation, ensuring consistent mechanical performance and extended service life under high-load and high-impact conditions.
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Outstanding Thermal Stability: Dense fused alumina withstands continuous operating temperatures exceeding 1800°C, making it a dependable refractory material for kilns, furnaces, and other extreme high-temperature industrial installations.
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Excellent Chemical Resistance:Its stable corundum crystalline phase provides strong resistance to acidic and alkaline environments, making it well-suited for chemically aggressive processing conditions in metallurgical and ceramic applications.
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Consistent Grain Morphology: Controlled fusion and crushing processes produce uniform, blocky grain shapes with predictable size distribution — ensuring reliable packing density, consistent abrasive performance, and repeatable refractory lining behavior.
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Versatile Processing Compatibility:Dense fused alumina bonds effectively with vitrified, resin, and ceramic bonding systems, offering broad compatibility across abrasive product manufacturing, refractory castable formulations, and advanced ceramic processing lines.
業界が直面する課題
High Energy Consumption
Raw Material Quality Dependency
Precise Process Control Requirements
Crushing & Sizing Complexity
製品概要
アルミナ
DFA-F-MET/R100
アルミナ
DFA-F-MET/R300
アルミナ
DFA-F-MET/R500
Why Use Our Dense fused alumina
Exceptional Hardness
With a Mohs hardness of 9, dense fused alumina delivers superior cutting efficiency and abrasion resistance, making it the material of choice for high-performance grinding wheels, precision cutting tools, and demanding surface finishing applications.
Ultra-Low Porosity
Its uniquely consolidated grain structure minimizes internal voids, reducing material absorption and crack propagation — ensuring consistent mechanical strength, extended service life, and reliable performance under high-load industrial operating conditions.
Outstanding Thermal Stability
Dense fused alumina maintains structural integrity at continuous operating temperatures exceeding 1800°C, making it a dependable refractory solution for kilns, furnaces, steel ladles, and other extreme high-temperature industrial installations.
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