High temperature electrical conductivity in undoped ceramic ZnOLott, Kalju; Nirk, Tiit; Gorokhova, Elena; Türn, Leo; Viljus, Mart; Öpik, Andres; Vishnjakov, A.Crystal research and technology2015 / p. 10-14 : ill https://doi.org/10.1002/crat.201400138 Conference proceedings at Scopus Article at Scopus Conference proceedings at WOS Article at WOS