Answers are grounded in this paper and cite their sources.
The availability of crystals of BaO made possible an investigation of the low frequency dielectric constant κ of BaO. This has been measured over the frequency range 60 to 6×{}10⁷ cycles per second and the temperature range -25^∘{} to 60^∘{}C. Over these ranges κ is about 34, which is quite different from the value of 14 frequently quoted. There is some evidence for a rise in κ at the lowest frequencies. Data on dielectric loss is presented.
No takes yet. Share an insight, caveat, or question.
Bever et al. (1951) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: