Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/2368
Title: Rheological behavior of PMN gels for solid freeform fabrication
Authors: Şakar Deliormanlı, Aylin
Çelik, Erdal
Polat, Mehmet
Keywords: Colloidal gels
Lead magnesium niobate
Shaping
Suspensions
Issue Date: Jul-2008
Publisher: Elsevier Ltd.
Source: Şakar‐Deliormanlı, A., Çelik, E., and Polat, M. (2008). Rheological behavior of PMN gels for solid freeform fabrication. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 324(1-3), 159-166. doi:10.1016/j.colsurfa.2008.04.029
Abstract: Lead magnesium niobate (PMN) is a relaxor ferroelectric material and have widespread applications in the manufacture of multilayer electronic devices such as ceramic capacitors, actuators and transducers. The dielectric constant of this electrostrictive material is much higher than the well known ferroelectric barium titanate. However, aqueous processing of PMN is not investigated yet especially for the novel wet shaping fabrication. In this study, concentrated aqueous colloidal PMN gels have been designed to use in the robocasting process. Concentrated PMN suspensions were stabilized by polyacrylic acid and then gelation induced by changing the pH or ionic strength of the suspension or by addition of a cationic polyelectrolyte to the system. Through this procedure it was essential to understand the solid-liquid transition under shear to explore the feasibility of forming without excessive use of polymers. Therefore, rheological response of the samples having a gel network was investigated. Results showed that gelation induced by cationic polyethylene imine or by multivalent salts were successful methods in preparation of PMN gels. However, gelation induced by changing the pH of the suspension was challenging due to ion dissolution from PMN surface.
URI: http://doi.org/10.1016/j.colsurfa.2008.04.029
http://hdl.handle.net/11147/2368
ISSN: 0927-7757
0927-7757
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Files in This Item:
File Description SizeFormat 
2368.pdfMakale1.17 MBAdobe PDFThumbnail
View/Open
Show full item record

CORE Recommender

SCOPUSTM   
Citations

13
checked on Oct 1, 2022

WEB OF SCIENCETM
Citations

11
checked on Oct 1, 2022

Page view(s)

82
checked on Oct 3, 2022

Download(s)

132
checked on Oct 3, 2022

Google ScholarTM

Check

Altmetric


Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.