Alumina ceramic substrates are high-performance ceramic materials primarily composed of aluminum oxide. They are typically manufactured through high-temperature sintering processes. Depending on the alumina content, they are classified into low-purity (75%-85% Al₂O₃), medium-purity (96% Al₂O₃), and high-purity (≥99% Al₂O₃) grades. Characterized by a dense microstructure and stable chemical properties, these substrates exhibit outstanding mechanical strength, high-temperature resistance, and electrical insulation. They are widely used as foundational materials in electronics, power systems, aerospace, and other advanced industries.
Advantages of Alumina Ceramic Substrates:
Exceptional Electrical Insulation
With a high resistivity (>10¹⁴ Ω·cm) and low dielectric constant (8-10), alumina ceramics effectively isolate electrical currents, preventing circuit shorting in high-frequency or high-voltage environments.
High Thermal Conductivity
Substrates with 96% alumina content offer a thermal conductivity of 24-28 W/(m·K), enabling efficient heat dissipation from electronic components to prevent overheating and extend device lifespan.
Superior Mechanical Strength
A flexural strength of 300-400 MPa, combined with high hardness (Mohs hardness 9) and wear resistance, ensures durability in demanding operational conditions.
Strong Chemical Stability
Resistant to acids, alkalis, oxidation, and moisture, alumina substrates maintain performance stability even at high temperatures (up to 1600°C) or in corrosive environments.
Precision Manufacturing
Precision machining allows micron-level surface smoothness, meeting strict dimensional requirements for applications like semiconductor packaging.
Post time: Nov-13-2025