Effect of dispersant content and drying method on ZrO2@Al2O3 multiphase ceramic powders

ZrO2@Al2O3 composite ceramic powders were prepared by solution combustion method with aluminum nitrate (Al (NO3)3) and 3 mol% yttria-stabilized tetragonal zirconia polycrystal (3Y- TZP) as the main raw materials, ammonium polyacrylate (PAA-NH4) as a dispersant, urea (CO (NH2)2) as a reducing agent....

Full description

Saved in:
Bibliographic Details
Published in:Ceramics international 2018-10, Vol.44 (15), p.17630-17634
Main Authors: Yu, Jun, Yu, Feng-Xiu, Wang, Shan, Zhang, Jie-Feng, Fan, Feng-Qiang, Long, Qiang
Format: Article
Language:English
Subjects:
Al2O3 ceramics
Multiphase ceramic powders
Solution combustion method
ZrO2@Al2O3
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:ZrO2@Al2O3 composite ceramic powders were prepared by solution combustion method with aluminum nitrate (Al (NO3)3) and 3 mol% yttria-stabilized tetragonal zirconia polycrystal (3Y- TZP) as the main raw materials, ammonium polyacrylate (PAA-NH4) as a dispersant, urea (CO (NH2)2) as a reducing agent. The effects of PAA-NH4 concentration and drying method on the microstructure and morphology of the ZrO2@Al2O3 powders were investigated. The results showed that when the concentration of PAA-NH4 was 1.5 wt%, and the molar ratio of Al (NO3)3 to CO (NH2)2 was 1:2, the ZrO2@Al2O3 powders with uniform grain size and high crystallinity could be synthesized by solution combustion drying method. Additionally, the abnormal growth of 3Y- TZP grain in ZrO2@Al2O3 was suppressed and the crystalline phase transformation trend (t-ZrO2 to m-ZrO2) was obviously decreased after sintering at 1600 °C.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2018.06.224