Fracto-Emission from Single Crystals of Quartz at a Cryogenic Temperature
Electron emissions from synthetic quartz during and after the fracture process were observed at room and cryogenic temperatures. Fracture at room temperature caused a larger number of emitted electrons with a longer decay time than at cryogenic temperature. Specimens quarried perpendicular to the Z-axis of the quartz emitted more electrons for a longer time than ones to the X-axis. With microscope observation of the fracture surface, these results are supposed to be caused by the difference in the crack propagation velocity during fracture. Electron emissions from defect rich samples irradiated by high energy electrons, were also observed and compared with pure samples. The obtained results had some difference from other insulating materials (ceramics, glasses) reported previously.1–3
KeywordsElectron Emission Cryogenic Temperature Fractographic Observation Count Interval Irradiate Specimen
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