2011•Rengong jingti xuebaoRequires access

Aqueous Tape Casting of Li_(1.075)Nb_(0.625)Ti_(0.45)O_3 Microwave Ceramic Sheets

Hui Ying Yang

Abstract

Aqueous tape casting of Li1.075Nb0.625Ti0.45O3 microwave ceramic green sheets was performed using water-soluble polyvinylalcohol(PVA) as binder,ethylene alcohol(EG) as plasticizer,and ammonium salt of polycarboxylate as dispersant.The rheological behaviors of colloidal Li1.075Nb0.625Ti0.45O3 slurries have been investigated.The results indicated that when the dispersant content is 0.6 wt%,binder content is 5 wt% and plasticizer content is 10 wt%,the slurries' dispersing stability is well.Moreover,Li1.075Nb0.625Ti0.45O3 aqueous tape casting slurries exhibited the desired shear-thinning behavior.High tensile strength and homogeneous microstructure of Li1.075Nb0.625Ti0.45O3 green sheets were achieved with the optimum slurry.

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Key concepts: Dispersant, Materials science, Slurry, Tape casting, Plasticizer, Aqueous solution, Ceramic, Ultimate tensile strength