Colloidal Processing of Fine Spinel Powders

Łukasz Zych; Anna Wajler; Radosław Lach

doi:10.4028/www.scientific.net/MSF.730-732.82

Paper Titles

Visco-Elastic-Plastic Properties of Suture Fibers Made of PLA-PCL
p.56

A Possible Nanoreactor: CaFe-L(ayered)D(ouble)H(ydroxide) with Intercalated Cinnamate Derivatives
p.65

Application of Impedance Spectroscopy for Bi_1−xNd_xFeO₃ Ceramics Characterization
p.71

Characterization of Bi₆Fe₂Ti₃O₁₈ Ceramics with Impedance Spectroscopy
p.76

Colloidal Processing of Fine Spinel Powders
p.82

Dielectric Properties of some Aurivillius Phases in the Bi₄Ti₃O₁₂ – BiFeO₃ System
p.88

Effect of Phosphogypsum on the Clinkerization Temperature of Portland Cement Clincker
p.94

Fabrication of Bi₆Fe₂Ti₃O₁₈ Ceramics by Mixed Oxide Method
p.100

Fabrication of La-Doped Bi₄Ti₃O₁₂ Ceramics
p.105

HomeMaterials Science ForumMaterials Science Forum Vols. 730-732Colloidal Processing of Fine Spinel Powders

Colloidal Processing of Fine Spinel Powders

Abstract:

Magnesium-aluminium spinel (MgAl₂O₄) in the form of transparent ceramics is applied in shields of infrared detectors or emitters, high-temperature widows and elements of military aircrafts and vehicles. Apart from high transparency for specific wave lengths, such materials should have good mechanical properties, especially hardness. It is the reason for production of the fine-grained materials. It seems that they can be produced from submicron powders consolidated by one of colloidal techniques. The work presents preliminary results of investigations on colloidal consolidation of two fine spinel powders with different particle size by pressure filtration and slip casting. The aim of the studies was consolidation of the fine powders leading to green samples with narrow pore size distribution. The samples were then sintered in isothermal conditions. Microstructure, Vickers hardness and transmission in infrared spectrum of the dense materials were examined.