Calcium hexaboride (CaB6) is a ceramic compound belonging to the rare-earth hexaboride family, characterized by exceptional hardness and thermal stability at elevated temperatures. It is primarily used in thermionic electron emitters, cathode materials for high-temperature vacuum devices, and specialized refractory applications where extreme thermal cycling resistance and low work function are required. CaB6 is notable for its superior performance in electron emission compared to traditional tungsten-based cathodes, making it the preferred choice in advanced electron microscopy, X-ray tubes, and plasma generation systems where reliability and long operational life are critical.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 152.4 | GPa | — | ||
Poisson's Ratio(ν) | 0.2600 | - | — | ||
Shear Modulus(G) | 110.5 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 2.456 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 4.500 | eV | — | ||
| ↳ | 0.04500 | eV | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Seebeck Coefficient(S) | -75.02 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf) | -0.4498 | eV/atom | — |