Fabrication, Densification and Thermionic Emission Property of Lanthanum Hexaboride
Source abstract
Abstract
An effective way to improve sintering densification of LaB6 was proposed and confirmed experimentally. Firstly, LaB6 nanopowders with a cube-like shape of ~ 94.7 nm were fabricated by molten salt synthesis route at 800 °C for 1 h. Then, LaB6 bulk material of 98% density was prepared by hot pressing sintering of as-synthesized LaB6 nanopowders under 1800 °C/50 MPa/30 min. The acquired LaB6 bulk material had a work function of 2.87 eV and exhibited an excellent thermionic emission property. The saturation emission current density at 1500 and 1600 °C reached 37.4 and 44.3 A/cm2, respectively.
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Research context
OpenAlex topics: Semiconductor materials and interfaces · Intermetallics and Advanced Alloy Properties · Advanced Materials Characterization Techniques
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