Synthesis and Electrical Characterization of a PLZT Piezoelectric-Ceramic
José Guadalupe Miranda-Hernández,
Ernesto Suaste-Gómez,
Carlos Omar González-Morán,
Héctor Herrera-Hernández,
Enrique Rocha-Rangel
Issue:
Volume 3, Issue 3, June 2014
Pages:
11-15
Received:
22 July 2014
Accepted:
8 August 2014
Published:
20 August 2014
Abstract: This research describes the synthesis of an outstanding ceramic-composite piezoelectric CCP (lead-lanthanum-zirconate-titanate, PLZT) by means of powders technique procedures. Full dense CCP compacts were obtained with a platinum wire implanted in the center of the piezoelectric, which were used to investigate the microstructural and opto-thermal properties. The microstructural details of this ceramic were investigated by optical microscopy; whereas the opto-thermal characterization was performed by measuring the electrical signal in a bidimensional setup under four different temperatures: 20°C, 35°C, 50°C and 75°C. A 160mW/cm2 LASER beam was used in order to produce the optical energy which is detected by the CCP. A total of one hundred of measurements were registered. Measurements showed that, in the explored thermal range, the CCP signal magnitude increased from 87.2 to 147.2 pA. About the microstructural analysis, the microstructure obtained show different phases as characteristic of the processing method, including porosity. The peculiar optical and thermal properties observed in the piezoelectric ceramic are promising for possible applications in temperature-controlled optical devices that require electrical outputs.
Abstract: This research describes the synthesis of an outstanding ceramic-composite piezoelectric CCP (lead-lanthanum-zirconate-titanate, PLZT) by means of powders technique procedures. Full dense CCP compacts were obtained with a platinum wire implanted in the center of the piezoelectric, which were used to investigate the microstructural and opto-thermal p...
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Bitumen Paints, an Old Story with New Approach, Part-2, Water Based Paints
Mesut Eren,
Rıza Aydemir,
Hakan Aşkun,
Ali Eren Özbey,
Murat Orbay
Issue:
Volume 3, Issue 3, June 2014
Pages:
16-21
Received:
22 August 2014
Accepted:
3 September 2014
Published:
20 September 2014
Abstract: Bitumen paints have lost their importance but are still used for large area applications such as tanks and pipelines. It was determined that improving solvent based paint properties by physical or chemical modification by polymers was possible. Applying this approach for water based paints has shown that advance in properties such as hardness and drying times without loss in adhesion and flexibility can be obtained by blending of various polymeric emulsions with bitumen emulsions used for waterproofing membranes. Changes in morphology of the films occurred after blending, indicating interaction between bitumen maltene fractions and polymers. Physical modifications with styrene acrylic emulsions were more rewarding than elastomeric or chemically modifying crosslinking emulsions.
Abstract: Bitumen paints have lost their importance but are still used for large area applications such as tanks and pipelines. It was determined that improving solvent based paint properties by physical or chemical modification by polymers was possible. Applying this approach for water based paints has shown that advance in properties such as hardness and d...
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