Basic materials characteristics | ||
Crystal Structure | Trigonal, point group 3m | |
Lattice Parameters | a=5.148Å, c=13.863Å | |
Density | 4.64 g/cm3 | |
Melting Point | 1250 °C | |
Curie Point | 1142±2℃ | |
Mohs Hardness | 5 | |
Dielectric Constant | e11/e0 = 85; e33/e0 = 29.5 | |
Thermal Conductivity | 38 W/m/°C at 25°C | |
Thermal Expansion Coefficient | a1=a2 =2x10-6/°C, a3=2.2x10-6/ °C at 25°C | |
Piezoelectric Strain Constant | d22 = 2.04 x 10-11 C/N, d33 = 19.22 x 10-11 C/N |
Black LN property list |
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Item | Standard Black | White LN |
Bulk resistivity(Ω.cm) | 2.40E+10 | 1.20E+150 |
Bulk conductivity(Ω-1.cm-1) | 4.17E-11 | 8.30E-16 |
Surface Electric Potential*1 /100m φ (kv) | <0.05 | 3.05 |
Electrical charges neutralization(sec.)_ | <60 | 73 |
Optical transmition(%)*2 color | Dark gray | Colorless |
Running Specs | ||||||||
Item | 4" | 6" | 8" | |||||
Cutting Type | Typical 36°Y/64°Y/128°Y/0°Y-Z/°Y/X/Y/Z-cut etc | |||||||
Diameter(round or square) (mm) | 100 | 150 | 200 | |||||
Tol(±mm) | 0.3 | 0.3 | 0.3 | |||||
Thickness (mm) | ≥0.15 | ≥0.25 | ≥0.3 | |||||
Primary flat (mm) | 32±2 | 57.5/42±2 | notch | |||||
LTV (5mmx5mm) (µm) | < 1 | < 1 | < 1 | |||||
TTV (µm) | < 1.5 | < 3 | < 5 | |||||
Bow (µm) | ±20 | ±30 | ±40 | |||||
Warp (µm) | ≤ 25 | ≤ 30 | ≤ 50 | |||||
PLTV (<0.5µm within 5*5mm) % | ≥95% | ≥95% | ≥95% | |||||
Edge bevel | According with IEC62276& SEMI M1.2 Standard | |||||||
Polished side Ra (nm) | ≤1.5 | |||||||
Back Side Criteria (µm) | general Ra:0.2-0.5or polished |