1954
DOI: 10.1038/1741010a0
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A New Type of Diffusion Cathode

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1955
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Cited by 8 publications
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“…While thermionic cathodes have been studied since the time of Edison, "dispenser" cathodes were first developed in the 1950s. Previous "oxide" cathodes consisted of a solid metal core coated in an emission enhancing oxide layer (Ba, Sr, or Ca carbonates and/or oxides, or other mixed oxides) [42]- [44]. Oxide cathodes exhibited effective work functions as low as ∼1.5 eV [26], [28], [42] and emitted between 1-10 A/cm 2 at operating temperatures of 700-800 • C but were limited to low total currents because emission was constrained by the conductivity of the oxide layer [26], [28].…”
Section: Introductionmentioning
confidence: 99%
“…While thermionic cathodes have been studied since the time of Edison, "dispenser" cathodes were first developed in the 1950s. Previous "oxide" cathodes consisted of a solid metal core coated in an emission enhancing oxide layer (Ba, Sr, or Ca carbonates and/or oxides, or other mixed oxides) [42]- [44]. Oxide cathodes exhibited effective work functions as low as ∼1.5 eV [26], [28], [42] and emitted between 1-10 A/cm 2 at operating temperatures of 700-800 • C but were limited to low total currents because emission was constrained by the conductivity of the oxide layer [26], [28].…”
Section: Introductionmentioning
confidence: 99%