high polished 99 alumina ceramic screws with thread cap cover manufacturer
Alumina Ceramic:
Alumina ceramics are ceramic materials based on alumina (Al2O3) for thick film integrated circuits. Alumina ceramics have good conductivity, mechanical strength and high temperature resistance. It should be noted that ultrasonic cleaning is required. Alumina ceramics is a versatile ceramic. Because of its superior performance, it has been widely used in modern society, satisfying the needs of daily use and special performance.
Alumina ceramic properties: High hardness, high strength, wear resistance, corrosion resistance, high temperacture (1600°), good thermal diffusivity, good insulativity, low cost etc.
Data Sheet↓
Item | Unit | Typical Values |
Physical Properties |
Color | White/Ivory |
Density | g/cm3 | 3.85 |
Alumina Content | % | 99% |
Gas permeability | 0 |
Water Absorption | 0 |
Mechanical Properties |
MONS' Hardness | 82 |
Vickers Hardness (Hv50) | Gpa(Kg/mm²) | 15.7(1600) |
Flexural Strength(20°C) | Mpa | 330 |
Compressive Strength(20°C) | Mpa | 2000 |
Fracture Toughness(20°C) | MPam1/2 | 4 |
Thermal Properties |
Thermal Conductivity(20°C-400°C) | W(m.K) | 27.5 |
Thermal Expansion Coefficient | 10-6/°C | 7.6 |
Thermal Shock Resistance | △T°C | 200 |
Maximum Use Temperature | °C | 1650 |
Electronic Properties |
Dielectric Strength | KV/mm | >10 |
Dielectric Constant | er | 9.1 |
Dielectric Loss Angle(1MHz) | 0.0002-0.0003 |
Volume Resistivity | Ω.cm | >10(14) |
Application industry: Machinery, electronic, chemical, petroleum etc.
Specific application: Electrical ceramic substrate, plunger, sealing ring etc.