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Detailed Program
Paper Number : EL-P04
Time Frame : 12:00~13:30
Presentation Date : Friday, 28, November
Session Name : Electronic Ceramics
Session Chair 1# : -
Session Chair 2# : -
Vertically aligned microstructures of PLZT ceramic films produced by Electrostatic Spray Deposition (ESD)
Mr. Dongsu Son
Korea Aerospace University
The vertically aligned arrays of PLZT perovskite nano-grains on the substrate are considered to be useful for commercial applications in many fields, due to their properties such as large surface areas, specified electron transport path, optical excitations, enhancement in the piezoelectric response etc. So, The distinctive properties of the ceramic films with oriented microstructures has been attracting attention for applications in several fields such as electronics, photonics, sensors, energy harvesting, information storage, and energy converters. The synthesis methods for the specific nanostructures can be mostly divided into template-assisted synthesis method and template-free synthesis method. The most widely used synthesis method to produce nanostructures is a template-assisted synthesis method. Although template-assisted synthesis method for synthesizing the nanostructures has many advantages, such as precisely controlled physical dimensions, mono-disperse nanostructures, there are a number of synthetic disadvantages, which include the need for template stable to chemical and thermal, the trouble for release of the nanostructures from the template channels, etc. Also, in case of their high volume production, the increased template price makes the cost-efficiency worse. Therefore, in this work, we produced the vertically aligned PLZT nano-grains without template-assisted ways. It demonstrated a new method and process for synthesis of one-dimensionally well aligned microstructures of the PLZT films by using a preferential landing phenomenon; unique phenomenon of ESD. Also, the deposition mechanism of the aligned ceramic films produced by ESD was described by analyzing with sol concentration and effect of additives. The maximum aspect ratio of the PLZT arrays produced in this work was higher than 1:16. The XRD analysis proved that the PLZT arrays produced by ESD have preferred orientations of (111) and scaled up as those orientations.
Acknowledgements : This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korean Government (Grant #: NRF-2013R1A1A2061760)