ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Dielectric constant (K) and loss (tan δ) of selenite single crystals have been measured in the frequency region 102 to 107 Hz and in the temperature range 30 to 400° C. Measurements have also been taken after X-ray or γ-ray irradiation for these crystals. At 30° C,K, which has larger values at lower frequencies, decreases with frequency, reaching a constant value of 5.8 beyond 105 Hz; similar behaviour is exhibited by tan δ. Variation ofK and tan δ with temperature at different frequencies shows peaks around 120 and 265° C, the peak positions remaining the same at all frequencies. X-ray irradiation of the sample increasesK and tan δ values at lower frequencies significantly, but decreases them at the peaks. It is observed that the changes ofK and tan δ are greater with γ-ray irradiation than with X-ray irradiation. An attempt is made to understand the results.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01154025
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