Crystallization Behavior and Electrical Properties of Wet-Chemically Deposited Lead Zirconate Titanate Thin Films

1993 ◽  
Vol 310 ◽  
Author(s):  
S. Merklein ◽  
D. Sporn ◽  
A. SchÖnecker
Keyword(s):  
Electrical Properties ◽  
Lead Zirconate Titanate ◽  
Lead Acetate ◽  
Ferroelectric Properties ◽  
Chemical Deposition ◽  
Deposition Process ◽  
Lead Zirconate ◽  
Lead Acetate Trihydrate ◽  
Acetate Trihydrate ◽  
Wet Chemical

AbstractA wet chemical deposition process for smooth and crackfree films in the system Pb(Zr 1-x Tix)O3 (PZT) has been developed. Final film thicknesses, reached with one coating step, were in the region of 1 μm. Starting from lead acetate trihydrate, zirconium- and titanium-n-propoxide, high molarity (> 2M) coating sols have been prepared that could be handled in air and were stable for more than 170 days.Films with compositions near the morphotropic phase boundary (x=47) and various lead contents were deposited on Pt-coated Si-wafers and Al2O3-substrates by a spin-on method. Wet films could be pyrolyzed and densified with a fast heat treatment without cracking. The crystallization of films into the desired perovskite structure started at comparatively low temperatures (ca. 530 °C) and proceeded rapidly at temperatures above 650 °C. A slight molar excess of lead and a proper heating rate were found to produce films with the best electrical properties. The films on platinized A12O3 substrates showed device-worthy dielectric and ferroelectric properties with typical values for Pn, EC, and ε, of 24 μC/cm2, 4.5 KV/mm and 650, respectively.

Lead acetate trihydrate precursor route to synthesize novel ultrafine lead oxide from spent lead acid battery pastes

2014 ◽  
Vol 269 ◽  
pp. 565-576 ◽  
Author(s):  
Xiaojuan Sun ◽  
Jiakuan Yang ◽  
Wei Zhang ◽  
Xinfeng Zhu ◽  
Yuchen Hu ◽  
...  
Keyword(s):  
Lead Acetate ◽  
Lead Oxide ◽  
Lead Acid Battery ◽  
Lead Acetate Trihydrate ◽  
Acetate Trihydrate ◽  
Precursor Route ◽  
Lead Acid

Induction of micronuclei in rat bone marrow after chronic exposure to lead acetate trihydrate

2008 ◽  
Vol 24 (9) ◽  
pp. 587-593 ◽  
Author(s):  
MA Alghazal ◽  
I Šutiaková ◽  
N Kovalkovičová ◽  
J Legáth ◽  
M Falis ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Lead Acetate ◽  
Mean Value ◽  
Female Rats ◽  
Male Rats ◽  
Control Group ◽  
Lead Acetate Trihydrate ◽  
Tukey Test ◽  
Acetate Trihydrate ◽  
Polychromatic Erythrocytes

Lead increasingly contributes to pollution of the environment and may play a role in the development of adverse effects in the human and animal body. Data concerning its mutagenic, clastogenic, and carcinogenic properties have been conflicting. In this study, we evaluated the frequency of micronuclei in bone marrow erythrocytes of rats treated with lead acetate trihydrate. Outbred Wistar rats were exposed to a daily dose of 100 mg/L drinking water for 125 days. The mean value of the total number of micronuclei observed in polychromatic erythrocytes of female rats was significantly higher than that found in the control group (13.375 ± 2.722 against 9.625 ± 3.204 micronuclei/1000 cells; P = 0.024 in ANOVA). In exposed female animals, no significant reduction of the ratio of polychromatic to normochromatic erythrocytes was observed (0.990 ± 0.228 against 1.208 ± 0.195; P = 0.060 in ANOVA). The effects of lead acetate trihydrate in male rats are both cytotoxic and genotoxic because of a decrease in ratio of polychromatic to normochromatic erythrocytes (0.715 ± 0.431 against 1.343 ± 0.306; P = 0.023, ANOVA followed by Tukey test) and an increase in frequency of micronucleated polychromatic erythrocytes (24.167 ± 7.859 against 4.0 ± 4.528 micronuclei/1000 cells; P ≤ 0.001, ANOVA followed by Tukey test), respectively.

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