GERANIUM
|
PROPERTY |
@ 300K |
UNITS |
REFERENCES |
|
Density |
5.32 |
G/cm3 |
Ge1 Ge2 Ge3 |
|
Specific Heat |
0.0761 |
Cal/g-K |
Ge4 Ge5 Ge6 |
|
Thermal Conductivity |
0.143 |
Cal/cm-s-K |
Ge7 Ge8 Ge9 |
|
Thermal Exp Coef |
5.7x10-6 |
1/K |
Ge10 Ge11 Ge12 |
|
Melting Point |
1210.7 |
K |
Ge13 |
|
Resistivity 1 |
0.018 |
Ohm-cm |
Ge14 Ge15 Ge16 |
|
TCR (218K to 398K) |
-1440 |
Ppm/K |
Ge14 Ge15 Ge16 |
|
Young’s Modulus 2 |
1.913x10-7 |
psi |
Ge17 Ge18 Ge19 |
|
Poisson’s Ratio |
0.207 |
----- |
Ge17 Ge18 Ge19 |
|
Yield Strength |
60,000 |
psi |
Ge21 |
|
Ult Tensile strength |
57,000 |
psi |
Ge20 Ge21 |
|
Elongation at Break 2 |
- 0 - |
% |
|
|
Hardness 3 |
1020 |
Brinell |
Ge22 Ge23 Ge24 |
1: The resistivity is a very strong function of the doping level. For the potential variations in the resistivity and TCR see the graph of resistivity –v- temperature. The values listed are intrinsic values.
2: Below about 500C, Ge is a brittle solid. Tensile fracture is preceded by no yielding or plastic formation. The maximum breaking strength is determined by the sizes and distribution of flaws present in the material. The flaw distribution is a strong function of the volume. Smaller samples will have a narrow distribution of smaller flaws and therefore will be inherently stronger. When loaded in compression between 700 and 1000K, a definite yield point is displayed. The yield strength for a single crystal loaded in the <100> at 700K is listed.
3: Hardness for the (111) face. For variation of hardness with orientation, see references.