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Product Name: Alumina Ceramic Substrate (HR, High Reflectivity)
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Product Features: High visible light reflectivity, high flexural strength, high insulation, large size, and laser-processable
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Application Scenario: COB packaging of LED chips
Product Name: Alumina Ceramic Substrate (HR, High Reflectivity)
Product Features: High visible light reflectivity, high flexural strength, high insulation, large size, and laser-processable
Application Scenario: COB packaging of LED chips
Material Grade | HR | |||
Content of Al2O3 | wt | % | >90% | |
Appearance | White | |||
Roughness | Ra | μm | 0.2~0.5 | |
Density | Drainage | g/cm3 | ≥3.75 | |
Light Reflectance | 450nm/1mm | % | 98 | |
Mechanical Characteristics | Flexural Strength | Three Point Bending Resistance | MPa | >380 |
Fracture Toughness | Indentation Method | MPa.m½ | 3.0 | |
Vickers Hardness | Load 4.9N | GPa | 14 | |
Young's Modulus | Stretching Method | Gpa | 330 | |
Thermal Characteristics | Coefficient of Linear Thermal Expansion | 25~800℃ | x10-6 /K |
7.7 |
Thermal Conductivity | 25℃ | W/(m.k) | >22 | |
Specific Heat Capacity | 25℃ | J/(kg.k) | 750 | |
Electrical Characteristics | Dielectric Constant | 1MHz,25℃ | - | 9.4 |
Dielectric Loss Angle | 1MHz,25℃ | x10-4 | ≤3 | |
Volume Resistivity | 25℃ | Ω.cm | ≥10¹⁴ | |
Dielectric Strength | DC | KV/mm | ≥15 |
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