Microstructure and properties of Cr[sub 2]O[sub 3]-doped ternary lead zirconate titanate ceramics

Journal Article · Sun Aug 01 00:00:00 EDT 1993 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1993.tb08327.x· OSTI ID:6187481

Liang, Chichkwo ^[1]; Wu, Long ^[2]

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1. Nan Tai Coll., Tainan (Taiwan, Province of China). Dept. of Electrical Engineering
2. National Cheng Kung Univ., Tainan (Taiwan, Province of China). Dept. of Electrical Engineering

The effects of Cr[sub 2]O[sub 3] doping (0 to 0.6 wt%) on the microstructure and electrical properties of ternary Pb[sub 0.97]Sr[sub 0.93]-[Zr[sub 0.458]Ti[sub 0.452](Mn[sub 1/3]Nb[sub 2/3])[sub 0.09]]O[sub 3] piezoelectric ceramics have been studied. Abnormal grain growth (grain sizes of 2.8 to 28.5 [mu]m) and densification (porosities of 2% to 12%) are found, and the tetragonality c/a nearly keeps constant whereas c and a slightly decrease in the doping range. The results for the temperature dependence of electric conductivity and the dielectric constant show that electric conductivity increases continuously over 0.1 wt% content, activation energies are all close to 0.92 eV in the paraelectric state, and the curie temperature [Tc] decreases with increasing doping content. Minor additives of [le]0.1 wt% improve the dielectric and piezoelectric properties, but with more additives of [ge]0.4 wt% electrical properties appear to deteriorate. Thus, these phenomena can be ascribed mainly to anomalous developed microstructure.

• OSTI ID: 6187481
• Journal Information: Journal of the American Ceramic Society; (United States), Vol. 76:8; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM OXIDES
ELECTRICAL PROPERTIES
MICROSTRUCTURE
PZT
ACTIVATION ENERGY
BULK DENSITY
CURIE POINT
DIELECTRIC MATERIALS
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
EXPERIMENTAL DATA
GRAIN GROWTH
MANGANESE OXIDES
NIOBIUM OXIDES
PIEZOELECTRICITY
POROSITY
TERNARY ALLOY SYSTEMS
ALLOY SYSTEMS
CHALCOGENIDES
CHROMIUM COMPOUNDS
DATA
DENSITY
ELECTRICITY
ENERGY
INFORMATION
LEAD COMPOUNDS
MANGANESE COMPOUNDS
MATERIALS
NIOBIUM COMPOUNDS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
THERMODYNAMIC PROPERTIES
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
ZIRCONATES
ZIRCONIUM COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies
360204 - Ceramics
Cermets
& Refractories- Physical Properties