Optimisation of the piezoelectric properties of thick-film piezoceramic devices
Optimisation of the piezoelectric properties of thick-film piezoceramic devices
This thesis details the optimisation of the thick-film piezoelectric strain constant d33,f and the mechanical properties of thick-film Lead Zirconate Titanate (PZT) materials. The investigation focuses on the effects of the fabrication process parameters involved in thick-film screen-printing and tine materials used.
Initial investigations examine the effect of powder milling on type PZT-5H powder supplied by Morgan Electro Ceramics Ltd. Ball milling, jet milling and attritor milling are studied in conjunction with the percentage of glass frit in the screen printable film. Subsequently, an investigation was conducted to improve the density of the fired film by blending ball and attritor milled powders together. The results showed that the optimum paste formulation is 18% attritor3,72% ball milled PZT-5H and 10% CF7575 lead borosilicate glass powders. Following the formulation of the optimum paste, a study was conducted to identify the optimum furnace firing profile and polarisation process. The study showed that a peak firing temperature of 1000°C and poling at a temperature of 200°C for 5 minutes produced the optimum piezoelectric activity. The results show an increase in d33,f value from 18.5pC/N to 131pC/N. This represents a six-fold increase in piezoelectric activity in the fired films. The introduction of a multilayer structure of three individual PZT layers improved the d33,f coefficient to 325pC/N.
Finally, the thesis outlines current applications and collaborative work for the optimised film and details avenues for future work and further development of the PZT-5H thick-film.
University of Southampton
Torah, Russel Neil
fea950ff-f12a-4f07-ad18-5e7d1ccad46f
2004
Torah, Russel Neil
fea950ff-f12a-4f07-ad18-5e7d1ccad46f
Torah, Russel Neil
(2004)
Optimisation of the piezoelectric properties of thick-film piezoceramic devices.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
This thesis details the optimisation of the thick-film piezoelectric strain constant d33,f and the mechanical properties of thick-film Lead Zirconate Titanate (PZT) materials. The investigation focuses on the effects of the fabrication process parameters involved in thick-film screen-printing and tine materials used.
Initial investigations examine the effect of powder milling on type PZT-5H powder supplied by Morgan Electro Ceramics Ltd. Ball milling, jet milling and attritor milling are studied in conjunction with the percentage of glass frit in the screen printable film. Subsequently, an investigation was conducted to improve the density of the fired film by blending ball and attritor milled powders together. The results showed that the optimum paste formulation is 18% attritor3,72% ball milled PZT-5H and 10% CF7575 lead borosilicate glass powders. Following the formulation of the optimum paste, a study was conducted to identify the optimum furnace firing profile and polarisation process. The study showed that a peak firing temperature of 1000°C and poling at a temperature of 200°C for 5 minutes produced the optimum piezoelectric activity. The results show an increase in d33,f value from 18.5pC/N to 131pC/N. This represents a six-fold increase in piezoelectric activity in the fired films. The introduction of a multilayer structure of three individual PZT layers improved the d33,f coefficient to 325pC/N.
Finally, the thesis outlines current applications and collaborative work for the optimised film and details avenues for future work and further development of the PZT-5H thick-film.
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Published date: 2004
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Local EPrints ID: 465410
URI: http://eprints.soton.ac.uk/id/eprint/465410
PURE UUID: 1bc8a654-70e1-402b-83ae-5084393277b3
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Date deposited: 05 Jul 2022 00:48
Last modified: 16 Mar 2024 20:09
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Author:
Russel Neil Torah
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