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Title: Characterization of internal boundary layer capacitors based upon barium titanate and strontium titanate

Abstract

The nature of ceramic microstructure and the electrical properties of individual grains and junctions was determined by STEM, microprobe analysis and microscale electrical measurements. The chemical compositions of the resistive boundary regions were different from those of the grains. Additives were concentrated in the boundary regions, forming resistive layers. Limited diffusion of the counterdopants into the grain subsurface formed an interfacial compensation layer between the insulating intergranular layer and the semiconducting grains. The electrical behavior of this intermediate layer was found to be similar to that of a depletion layer. Ceramic microstructures were approximated by a three-layer n-c-i-c-n model and representive equivalent circuit, which was used to explain the voltage dependence of the dielectric constant and dispersion behavior. Calculated properties were in good agreement with experimental values. Fine grain microstructures developed by liquid phase sintering techniques, were suitable for high dielectric constant multilayer capacitors, based upon internal boundary layer phenomena, and these capacitors had stable dielectric characteristics.

Authors:
 [1]
  1. Univ. of Illinois, Urbana-Champaign, IL (United States)
Publication Date:
Research Org.:
Univ. of Illinois, Urbana-Champaign, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
6697644
Report Number(s):
DOE/ER/01198-1340
DOE Contract Number:  
AC02-76ER01198
Resource Type:
Thesis/Dissertation
Resource Relation:
Other Information: Thesis
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 36 MATERIALS SCIENCE; BARIUM COMPOUNDS; ELECTRICAL PROPERTIES; CAPACITORS; STRONTIUM COMPOUNDS; TITANATES; MICROSTRUCTURE; ALKALINE EARTH METAL COMPOUNDS; CRYSTAL STRUCTURE; ELECTRICAL EQUIPMENT; EQUIPMENT; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; 420200* - Engineering- Facilities, Equipment, & Techniques

Citation Formats

Park, Hyun Duk. Characterization of internal boundary layer capacitors based upon barium titanate and strontium titanate. United States: N. p., 1981. Web. doi:10.2172/6697644.
Park, Hyun Duk. Characterization of internal boundary layer capacitors based upon barium titanate and strontium titanate. United States. doi:10.2172/6697644.
Park, Hyun Duk. Thu . "Characterization of internal boundary layer capacitors based upon barium titanate and strontium titanate". United States. doi:10.2172/6697644. https://www.osti.gov/servlets/purl/6697644.
@article{osti_6697644,
title = {Characterization of internal boundary layer capacitors based upon barium titanate and strontium titanate},
author = {Park, Hyun Duk},
abstractNote = {The nature of ceramic microstructure and the electrical properties of individual grains and junctions was determined by STEM, microprobe analysis and microscale electrical measurements. The chemical compositions of the resistive boundary regions were different from those of the grains. Additives were concentrated in the boundary regions, forming resistive layers. Limited diffusion of the counterdopants into the grain subsurface formed an interfacial compensation layer between the insulating intergranular layer and the semiconducting grains. The electrical behavior of this intermediate layer was found to be similar to that of a depletion layer. Ceramic microstructures were approximated by a three-layer n-c-i-c-n model and representive equivalent circuit, which was used to explain the voltage dependence of the dielectric constant and dispersion behavior. Calculated properties were in good agreement with experimental values. Fine grain microstructures developed by liquid phase sintering techniques, were suitable for high dielectric constant multilayer capacitors, based upon internal boundary layer phenomena, and these capacitors had stable dielectric characteristics.},
doi = {10.2172/6697644},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {1}
}

Thesis/Dissertation:
Other availability
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