Hydrolysis-Induced Aqueous Gelcasting of Magnesium Aluminate Spinel

被引：5

作者：

Ganesh, Ibram ^{[1
]}

Reddy, Gundala Jaganatha ^{[1
]}

Sundararajan, Govindan ^{[1
]}

Olhero, Susana M. ^{[2
]}

Torres, Paula M. C. ^{[3
]}

Ferreira, Jose M. F. ^{[3
]}

机构：

[1] Int Adv Res Ctr Powder Met & New Mat ARCI, Ctr Adv Ceram, Hyderabad 500005, Andhra Pradesh, India

[2] Univ Porto, Dept Mech Engn & Ind Management, FEUP, P-4100 Oporto, Portugal

[3] Univ Aveiro, Dept Ceram & Glass Engn, CICECO, P-3810193 Aveiro, Portugal

来源：

INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY | 2011年 / 8卷 / 04期

关键词：

MGAL2O4; SPINEL; ASSISTED SOLIDIFICATION; DENSIFICATION BEHAVIOR; CERAMICS; POWDERS; ROUTE;

D O I：

10.1111/j.1744-7402.2010.02520.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This paper reports on the synthesis of magnesium aluminate spinel (MAS) powders and consolidation of MAS ceramics by hydrolysis-induced aqueous gelcasting (GCHAS). The MAS powders surface passivated against hydrolysis were dispersed in an aqueous-organic premix solution using suitable dispersants. The consolidation of green bodies occurred under ambient conditions by adding a polymerization initiator, a catalyst, and AlN (0-4.06 wt%) as a cosetting agent. Green samples with exceptionally high green strength (similar to 21 MPa) were obtained in the presence of 4.06 wt% AlN. Sintered (1650 degrees C, 1 h) MAS ceramics consolidated by GCHAS exhibited mechanical properties that are comparable to those consolidated by dry pressing.

引用

页码：873 / 884

页数：12

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