Dispersion and gelation properties of alumina systems with Isobam assisted by dicarboxylic acids

Yuju Lu; Ke Gan; Jie Xu; Lin Lv; Wenlong Huo; Jingjing Liu; Xiaoyan Zhang; Jinlong Yang

doi:10.1016/j.ceramint.2019.03.084

Dispersion and gelation properties of alumina systems with Isobam assisted by dicarboxylic acids

Yuju Lu, Ke Gan, Jie Xu, Lin Lv, Wenlong Huo, Jingjing Liu, Xiaoyan Zhang, Jinlong Yang

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

Isobam, a copolymer of isobutylene and maleic anhydride, is a newly developed gelling agent for ceramic colloidal forming. However, the Isobam system exposes a weakness of high viscosity when solids loading exceeds 54 vol%. Suitable additives to effectively decrease viscosity and have minimal impact on gelation strength were discovered from various dicarboxylic acids through investigation on zeta potential, viscosity of suspensions, shear modulus during gelation and yield stress and modulus of elasticity of wet green bodies. Alumina ceramics with flexural strength of 442±49MPa and a Weibull modulus of 10.8 were produced from 54 vol% suspensions with 0.5 wt% Isobam assisted by 0.04 wt% phthalic acid and 0.03 wt% oxalic acid after pressureless sintering.

Original language	English
Pages (from-to)	11939-11945
Number of pages	7
Journal	Ceramics International
Volume	45
Issue number	9
DOIs	https://doi.org/10.1016/j.ceramint.2019.03.084
State	Published - 15 Jun 2019

Keywords

Alumina
Dicarboxylic acid
Gelation
Isobam
Viscosity

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10.1016/j.ceramint.2019.03.084

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title = "Dispersion and gelation properties of alumina systems with Isobam assisted by dicarboxylic acids",

abstract = "Isobam, a copolymer of isobutylene and maleic anhydride, is a newly developed gelling agent for ceramic colloidal forming. However, the Isobam system exposes a weakness of high viscosity when solids loading exceeds 54 vol%. Suitable additives to effectively decrease viscosity and have minimal impact on gelation strength were discovered from various dicarboxylic acids through investigation on zeta potential, viscosity of suspensions, shear modulus during gelation and yield stress and modulus of elasticity of wet green bodies. Alumina ceramics with flexural strength of 442±49MPa and a Weibull modulus of 10.8 were produced from 54 vol% suspensions with 0.5 wt% Isobam assisted by 0.04 wt% phthalic acid and 0.03 wt% oxalic acid after pressureless sintering.",

keywords = "Alumina, Dicarboxylic acid, Gelation, Isobam, Viscosity",

author = "Yuju Lu and Ke Gan and Jie Xu and Lin Lv and Wenlong Huo and Jingjing Liu and Xiaoyan Zhang and Jinlong Yang",

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doi = "10.1016/j.ceramint.2019.03.084",

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T1 - Dispersion and gelation properties of alumina systems with Isobam assisted by dicarboxylic acids

AU - Lu, Yuju

AU - Gan, Ke

AU - Xu, Jie

AU - Lv, Lin

AU - Huo, Wenlong

AU - Liu, Jingjing

AU - Zhang, Xiaoyan

AU - Yang, Jinlong

PY - 2019/6/15

Y1 - 2019/6/15

N2 - Isobam, a copolymer of isobutylene and maleic anhydride, is a newly developed gelling agent for ceramic colloidal forming. However, the Isobam system exposes a weakness of high viscosity when solids loading exceeds 54 vol%. Suitable additives to effectively decrease viscosity and have minimal impact on gelation strength were discovered from various dicarboxylic acids through investigation on zeta potential, viscosity of suspensions, shear modulus during gelation and yield stress and modulus of elasticity of wet green bodies. Alumina ceramics with flexural strength of 442±49MPa and a Weibull modulus of 10.8 were produced from 54 vol% suspensions with 0.5 wt% Isobam assisted by 0.04 wt% phthalic acid and 0.03 wt% oxalic acid after pressureless sintering.

AB - Isobam, a copolymer of isobutylene and maleic anhydride, is a newly developed gelling agent for ceramic colloidal forming. However, the Isobam system exposes a weakness of high viscosity when solids loading exceeds 54 vol%. Suitable additives to effectively decrease viscosity and have minimal impact on gelation strength were discovered from various dicarboxylic acids through investigation on zeta potential, viscosity of suspensions, shear modulus during gelation and yield stress and modulus of elasticity of wet green bodies. Alumina ceramics with flexural strength of 442±49MPa and a Weibull modulus of 10.8 were produced from 54 vol% suspensions with 0.5 wt% Isobam assisted by 0.04 wt% phthalic acid and 0.03 wt% oxalic acid after pressureless sintering.

KW - Alumina

KW - Dicarboxylic acid

KW - Gelation

KW - Isobam

KW - Viscosity

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U2 - 10.1016/j.ceramint.2019.03.084

DO - 10.1016/j.ceramint.2019.03.084

M3 - 文章

AN - SCOPUS:85063007872

SN - 0272-8842

VL - 45

SP - 11939

EP - 11945

JO - Ceramics International

JF - Ceramics International

IS - 9

ER -

Dispersion and gelation properties of alumina systems with Isobam assisted by dicarboxylic acids

Abstract

Keywords

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