Room-temperature gelcasting of alumina with a water-soluble copolymer

A novel and simple method for gelcasting of alumina was developed using a nontoxic and water-soluble copolymer of isobutylene and maleic anhydride (commercially called Isobam). In this method, there is requirement of only a small amount of Isobam (0.3 wt%) and neither initiators nor dispersants are...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials research 2013-06, Vol.28 (11), p.1512-1516
Main Authors: Yang, Yan, Shimai, Shunzo, Wang, Shiwei
Format: Article
Language:English
Subjects:
Alumina
Aluminum oxide
Analysis
Applied and Technical Physics
Biomaterials
Ceramics
Copolymers
Epoxy resins
Gelcasting
Inorganic Chemistry
Materials Engineering
Materials research
Materials Science
Nanotechnology
Polymerization
Polymers
Polyvinyl alcohol
Rheology
Studies
Toxicity
Viscosity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A novel and simple method for gelcasting of alumina was developed using a nontoxic and water-soluble copolymer of isobutylene and maleic anhydride (commercially called Isobam). In this method, there is requirement of only a small amount of Isobam (0.3 wt%) and neither initiators nor dispersants are needed for preparation and gelation of a 50 vol% solids loaded alumina slurry. The gelation rate increased with increasing solids loading but decreased with increasing Isobam content. A typical gelation time was 38 min for the slurry containing 50 vol% solids loading and 0.3 wt% Isobam. The resultant wet gel was strong enough to allow reversible bending and twisting. This simple gelling system is attractive for wet forming of ceramics because only a single additive, which acts as both dispersant and gelling agent at room temperature in air, is used.
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2013.132