Thermionic emission and vaporization behavior of the ternary systems of lanthanum hexaboride containing molybdenum boride, molybdenum diboride, zirconium diboride, gadolinium hexaboride, and neodymium hexaboride

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Abstract
The addition of various compounds to LaB6 did not improve the thermionic emission over that of pure LaB6. This experience and general conclusions, which result by considering the vaporization properties of these and other materials, greatly limit the options available to improve the properties of LaB6 by forming a ternary system. The principles which must be considered, in order to simplify future work, are described.