Definition of thermion in English:

thermion

noun ˈθəːmɪɒnˈθərmˌiən

An ion or electron emitted by a substance at high temperature.
Example sentencesExamples
- Alloyed thorium enhances the emission of thermions by lowering the work function barriers.
- Another theory is that, since energy is required to extract electrons from the heated material, there should be cooling when thermions are emitted.
- He discovered the Schottky effect, an irregularity in the emission of thermions in a vacuum tube and invented the screen-grid tetrode tube.
- If the ionization electrode is located at an appropriate position in the vicinity of the evaporation source and a positive voltage with respect to that of the evaporation source is applied to the electrode, thermions and secondary electrons from the evaporation source migrate toward the ionization electrode.
- When the main power supply of the X-ray tube is on, the cathode emits thermions as it is heated by a heater.

Origin

Early 20th century: from thermo- 'of heat' + ion.

Definition of thermion in US English:

thermion

nounˈTHərmˌēənˈθərmˌiən

An ion or electron emitted by a substance at high temperature.
Example sentencesExamples
- Another theory is that, since energy is required to extract electrons from the heated material, there should be cooling when thermions are emitted.
- Alloyed thorium enhances the emission of thermions by lowering the work function barriers.
- When the main power supply of the X-ray tube is on, the cathode emits thermions as it is heated by a heater.
- If the ionization electrode is located at an appropriate position in the vicinity of the evaporation source and a positive voltage with respect to that of the evaporation source is applied to the electrode, thermions and secondary electrons from the evaporation source migrate toward the ionization electrode.
- He discovered the Schottky effect, an irregularity in the emission of thermions in a vacuum tube and invented the screen-grid tetrode tube.

Origin

Early 20th century: from thermo- ‘of heat’ + ion.

单词	thermion
释义	Definition of thermion in English: thermion noun ˈθəːmɪɒnˈθərmˌiən An ion or electron emitted by a substance at high temperature. Example sentencesExamples Alloyed thorium enhances the emission of thermions by lowering the work function barriers. Another theory is that, since energy is required to extract electrons from the heated material, there should be cooling when thermions are emitted. He discovered the Schottky effect, an irregularity in the emission of thermions in a vacuum tube and invented the screen-grid tetrode tube. If the ionization electrode is located at an appropriate position in the vicinity of the evaporation source and a positive voltage with respect to that of the evaporation source is applied to the electrode, thermions and secondary electrons from the evaporation source migrate toward the ionization electrode. When the main power supply of the X-ray tube is on, the cathode emits thermions as it is heated by a heater. Origin Early 20th century: from thermo- 'of heat' + ion. Definition of thermion in US English: thermion nounˈTHərmˌēənˈθərmˌiən An ion or electron emitted by a substance at high temperature. Example sentencesExamples Another theory is that, since energy is required to extract electrons from the heated material, there should be cooling when thermions are emitted. Alloyed thorium enhances the emission of thermions by lowering the work function barriers. When the main power supply of the X-ray tube is on, the cathode emits thermions as it is heated by a heater. If the ionization electrode is located at an appropriate position in the vicinity of the evaporation source and a positive voltage with respect to that of the evaporation source is applied to the electrode, thermions and secondary electrons from the evaporation source migrate toward the ionization electrode. He discovered the Schottky effect, an irregularity in the emission of thermions in a vacuum tube and invented the screen-grid tetrode tube. Origin Early 20th century: from thermo- ‘of heat’ + ion.
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