In this paper, the experimental results of the study of the
behaviour of three-layer solid
dielectrics in high electric field are presented. The
breakdown voltage and the breakdown channel forms depend on factors
such as the position of the boundaries between layers in the gap, the ratio
of permittivities of layer materials, and the homogeneity of barrier
materials. It was found that polarization plays the main role in the
barrier effect.
The experimental results of a study of the tree-inception phenomenon for three-layer dielectrics in a divergent field are presented in this paper. It is shown that the tree-inception time depends on both the position of the high-permittivity barrier in the insulating gap and the ratio of the permittivities of the barrier material and main dielectric, and that it has a maximum at the optimal barrier position. It is found that the tree-inception length has a minimum value at this barrier position. Good agreement between the coefficient of the local field non-uniformity and the tree-inception time or the initial tree length was found.
The conditions of in ultrasound (US) transmission through a nanodispersed powder (NP) and possible effects of US-action at compacting of NP ZrO2 − Y2O3 are analyzed. These effLcts include agglomerate crushing, NP particle activation under the conditions of acoustic flows; dense NP compacting with the preservation of a compact nanostructure in the absence of acoustic flows. It was shown that the result of 13S action was dcfined by the compacting pressure P and ItS intensity level I, the values of which were divided into the ranges by the critical parameters PC and IC NP transfers from the state of gas-dispersed medium to the state of a solid porous body at P = PC, and IC characterizes the threshold of acoustic flows appearance in the powder body.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.