High-purity alumina typically refers to aluminum oxide with a purity exceeding 99.99%. It is a high-performance ceramic material that plays a vital role in high-tech industries due to its excellent physical and chemical properties.
Key Features
High Purity: Extremely low impurity content prevents adverse effects on the performance of downstream products (especially LEDs).
High Melting Point: Approximately 2050°C, with excellent thermal stability.
High Hardness: With a Mohs hardness of 9, it offers excellent wear resistance.
Excellent Insulation: High resistivity makes it an excellent electrical insulator.
Excellent Chemical Inertness: Resistant to acid and alkali corrosion, it remains stable even in harsh environments.
High Transmittance: When formed into a transparent ceramic or crystal, it exhibits excellent transmittance for visible and infrared light.
Main Applications
In the semiconductor lighting industry, high-purity alumina is the only raw material for manufacturing sapphire crystal, the core substrate of LED chips. Behind every efficient, energy-saving, and long-lasting LED light lies a sapphire substrate, transformed from high-purity alumina.
In the new energy sector, high-purity alumina serves as the "safety shield" for lithium-ion batteries. Applying a nano-scale coating to the surface of battery separators significantly improves the separator's heat resistance and stability, effectively preventing battery overheating and accidents. This provides crucial protection for the safe operation of electric vehicles and energy storage systems, safeguarding the green energy revolution.
Ceramic components made of high-purity alumina are ubiquitous within precision equipment in the semiconductor industry. Operating in harsh environments rife with plasma and corrosive gases, these components, thanks to their high purity, high hardness, and excellent corrosion resistance, ensure the highly precise and stable chip manufacturing process, preventing any impurities from contaminating the precious silicon wafers. They are the unspoken hero of the chip's creation.
In short, while not visible in end products, high-purity alumina, with its irreplaceable properties, has deeply penetrated and supported the backbone of modern high-tech industries. From lighting our lives to ensuring travel safety and driving digitalization, it is ubiquitous, quietly yet powerfully driving the progress of our times.
