Files in this item
Files | Description | Format |
---|---|---|
application/pdf ![]() ![]() | (no description provided) |
Description
Title: | Directed Colloidal Assembly and Characterization of PZT -Polymer Composites |
Author(s): | Smay, James Earl |
Doctoral Committee Chair(s): | Lewis, Jennifer A. |
Department / Program: | Materials Science and Engineering |
Discipline: | Materials Science and Engineering |
Degree Granting Institution: | University of Illinois at Urbana-Champaign |
Degree: | Ph.D. |
Genre: | Dissertation |
Subject(s): | Engineering, Materials Science |
Abstract: | Concentrated (&phis;PZT = 0.47) PZT-5H gels were developed as inks for the robotic deposition of 3-D, mesoscale periodic structures with self-supporting features such as lattices of rod-like elements and v-shaped test structures. The gels exhibited pH dependent viscoelastic properties and Hershel-Bulkley flow behavior. The deflection of as-deposited spanning elements was measured using laser profilometry. Flow modeling and shape evolution data indicated a core-shell architecture as the ink exited the deposition nozzle, which simultaneously provided strength to form spanning elements and good bonding between layers. The core grew rapidly (∼1s) due to the quick recovery of gel structure in these inks. 3-X type PZT-polymer composites consisting of PZT lattices in a polymer matrix (3-3), a lattice/polymer matrix with PZT faceplates (3-2), or a lattice/polymer matrix with faceplates and encircled by a solid PZT ring (3-1) were formed and their piezoelectric properties were characterized. The PZT:polymer ratio was controlled by the lattice spacing in these thin composites (∼1 mm). Lattice rod intersections formed high permittivity, low compliance PZT pillars that concentrated stress and electric flux, leading to improved hydrostatic figures of merit. |
Issue Date: | 2002 |
Type: | Text |
Language: | English |
Description: | 175 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2002. |
URI: | http://hdl.handle.net/2142/82717 |
Other Identifier(s): | (MiAaPQ)AAI3044225 |
Date Available in IDEALS: | 2015-09-25 |
Date Deposited: | 2002 |
This item appears in the following Collection(s)
-
Dissertations and Theses - Materials Science and Engineering
-
Graduate Dissertations and Theses at Illinois
Graduate Theses and Dissertations at Illinois