Dopant incorporation in ceramics prepared by binder coagulation casting

• Published in: Materials chemistry and physics Vol. 67; no. 1; pp. 133 - 139
• Main Authors: Walker, W.J, Chatterjee, D.K, Ghosh, S.K, Amarakoon, V.R.W
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 01.01.2001; Elsevier
• Subjects: Binder coagulation casting; Ceramics; Chelation; Cross-disciplinary physics: materials science; rheology; Dopant incorporation; Exact sciences and technology; Materials science; Materials synthesis; materials processing; Physics; Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation; Sintering; Zirconia; Zirconia; Chelation; Binder coagulation casting; Ceramics; Sintering; Dopant incorporation; Grain size; Thermal expansion; Atomic force microscopy; Coagulation; Doping; SEM; Experimental study; Binders
• ISSN: 0254-0584; 1879-3312
• DOI: 10.1016/S0254-0584(00)00430-2

Uniform incorporation of inorganic dopants and sintering aids into ceramic green bodies is necessary for the development of controlled microstructures during sintering. Binder coagulation casting (BCC) is a novel near-net shape fabrication process that is driven by controlled adsorption of polymeric binders. Two methods were used to incorporate small amounts of inorganic additives into ceramic compositions formed using BCC: the conventional mixed powder method and a novel method of using the organic additive system in BCC as a chelating agent for dopant cations. Cobalt dopant in zirconia was used as a model system for this work. MgO sintering aid in alumina was also examined. Sintering behavior and microstructure analysis using AFM are discussed.