Preparation of Refractory Nozzle by Gelcasting of Zirconia Suspensions with Coarse Particles

Li Ming Zhang; Tian Ma; Hai Feng Li; Yong Huang

doi:10.4028/www.scientific.net/KEM.280-283.987

Paper Titles

Anelasticity and Strength in Zirconia Ceramics
p.967

The Study on Degradation of Y₂O₃-CeO₂-Partially Stabilized ZrO₂ Adding Al₂O₃ Particles at Low Temperature
p.973

Study on Preparation of Spherical Zirconia Powder in Microemulsion System and its Surface Characteristics
p.977

Preparation of Zirconia Nanopowders in Ultrasonic Field by the Sol-Gel Method
p.981

Preparation of Refractory Nozzle by Gelcasting of Zirconia Suspensions with Coarse Particles
p.987

Plastic Forming of Zirconia from Coagulated Suspensions
p.991

Fabrication of Porous Zirconia Using Filter Paper Template
p.993

Properties of ZrO₂/Glass-Ceramics Composite
p.995

Effect of Dopants on the Corrosion Behaviour of Zirconia by Steel at High Temperature
p.999

HomeKey Engineering MaterialsKey Engineering Materials Vols. 280-283Preparation of Refractory Nozzle by Gelcasting of...

Preparation of Refractory Nozzle by Gelcasting of Zirconia Suspensions with Coarse Particles

Abstract:

Zirconia suspensions with coarse particles were prepared and the rheogical behavior and sediment stability of such suspensions with different dispersants were studied. It was found that ZrO2 suspension stabilized with TAC (tri-ammonium citrate) has an obvious shear-thinning behavior and rapid settlement; In contrast, the suspension stabilized with arabic gum shows a shear-thickening behavior and hardly any settlement. Considering both fluidity and settlement stability, APA (ammonium-polyacrylate) was chosen as the dispersant to increase the solid volume fraction of ZrO2 suspension. Utilizing the above suspension, a kind of refractory nozzle for precision casting of a Cu-Cr alloy was prepared by gelcasting. Such nozzle has a very good resistance to thermal shock and flux scouring.