thermal ionization
Ionization of particles brought about by a high temperature—for example, emission of ions from an adsorbed layer on an incandescent metal surface.
Source: IUPAC
The term "thermal ionization" was found in the following pages:
Thermo Electron opens new site for Advanced Mass Spectrometry Product Development and Manufacturing In Bremen, Germany | EVISA's News
2nd International Conference on Ionization Principles in Organic and Inbotganic Mass Spectrometry | EVISA's Agenda of Events
Instrument database: Thermo Scientific - Finnigan TRITON
2nd International Conference on Ionization Principles in Organic and Inorganic Mass Spectrometry | EVISA's Agenda of Events
Instrument database: Thermolinear - WiFi - The High Precision Isotope Mass Spectrometer
Instrument database: IsotopX Ltd - IsoProbe-T™