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Title: The effects of dopants on the electrical resistivity in lead magnesium niobate multilayer ceramic capacitors

Abstract

Electrical resistivity studies were performed on multilayer ceramic capacitors (MLC) based on lead magnesium niobate and containing dopants of lead titanate, lead zinc niobate, and lead cobalt niobate. The results showed that lead titanate and/or lead zinc niobate had no effect on the electrical resistivity while lead cobalt niobate decreased the resistivity. In samples without lead cobalt niobate, we observed a conduction mechanism with an activation energy of --1 eV, which is commonly observed in barium titanate based dielectrics. This is attributed to ionic conduction via the motion of oxygen vacancies. The increase in conductivity (or decrease in resistivity) resulting from the addition of lead cobalt niobate was rationalized as due to electronic conduction through charge hopping among the cations. This conduction mechanism was characterized by an activation energy of --0.5 eV. Since the activation energy associated with the long-term failure was previously determined by a matrix of temperature and voltage accelerated life tests to be -- 1 eV, they conclude that conduction through charge hopping is not affecting the long-term reliability of these devices.

Authors:
;  [1]
  1. AT and T Bell Labs., Princeton, NJ (US)
Publication Date:
OSTI Identifier:
5410536
Resource Type:
Journal Article
Journal Name:
IEEE (Institute of Electrical and Electronics Engineers) Transactions on Components, Hybrids, and Manufacturing Technology; (USA)
Additional Journal Information:
Journal Volume: 12:2; Journal ID: ISSN 0148-6411
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 36 MATERIALS SCIENCE; 74 ATOMIC AND MOLECULAR PHYSICS; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CAPACITORS; MATERIALS TESTING; NIOBATES; DIELECTRIC PROPERTIES; TITANATES; ACTIVATION ENERGY; CHARGE TRANSPORT; COBALT COMPOUNDS; CRYSTAL DOPING; ELECTRIC IMPEDANCE; ELECTRONIC STRUCTURE; IONIC CONDUCTIVITY; LEAD COMPOUNDS; MAGNESIUM COMPOUNDS; OXYGEN; RELIABILITY; VACANCIES; ZINC COMPOUNDS; ALKALINE EARTH METAL COMPOUNDS; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; ELECTRIC CONDUCTIVITY; ELECTRICAL EQUIPMENT; ELECTRICAL PROPERTIES; ELEMENTS; ENERGY; EQUIPMENT; IMPEDANCE; NIOBIUM COMPOUNDS; NONMETALS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; POINT DEFECTS; REFRACTORY METAL COMPOUNDS; TESTING; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; 250400* - Energy Storage- Capacitor Banks; 360204 - Ceramics, Cermets, & Refractories- Physical Properties; 640302 - Atomic, Molecular & Chemical Physics- Atomic & Molecular Properties & Theory; 400201 - Chemical & Physicochemical Properties

Citation Formats

Chang, D D, and Ling, H C. The effects of dopants on the electrical resistivity in lead magnesium niobate multilayer ceramic capacitors. United States: N. p., 1989. Web. doi:10.1109/33.31438.
Chang, D D, & Ling, H C. The effects of dopants on the electrical resistivity in lead magnesium niobate multilayer ceramic capacitors. United States. doi:10.1109/33.31438.
Chang, D D, and Ling, H C. Thu . "The effects of dopants on the electrical resistivity in lead magnesium niobate multilayer ceramic capacitors". United States. doi:10.1109/33.31438.
@article{osti_5410536,
title = {The effects of dopants on the electrical resistivity in lead magnesium niobate multilayer ceramic capacitors},
author = {Chang, D D and Ling, H C},
abstractNote = {Electrical resistivity studies were performed on multilayer ceramic capacitors (MLC) based on lead magnesium niobate and containing dopants of lead titanate, lead zinc niobate, and lead cobalt niobate. The results showed that lead titanate and/or lead zinc niobate had no effect on the electrical resistivity while lead cobalt niobate decreased the resistivity. In samples without lead cobalt niobate, we observed a conduction mechanism with an activation energy of --1 eV, which is commonly observed in barium titanate based dielectrics. This is attributed to ionic conduction via the motion of oxygen vacancies. The increase in conductivity (or decrease in resistivity) resulting from the addition of lead cobalt niobate was rationalized as due to electronic conduction through charge hopping among the cations. This conduction mechanism was characterized by an activation energy of --0.5 eV. Since the activation energy associated with the long-term failure was previously determined by a matrix of temperature and voltage accelerated life tests to be -- 1 eV, they conclude that conduction through charge hopping is not affecting the long-term reliability of these devices.},
doi = {10.1109/33.31438},
journal = {IEEE (Institute of Electrical and Electronics Engineers) Transactions on Components, Hybrids, and Manufacturing Technology; (USA)},
issn = {0148-6411},
number = ,
volume = 12:2,
place = {United States},
year = {1989},
month = {6}
}