Papers by Keyword: Binder Removal

Abstract: The binder system removal was studied in a laminated B₄C ceramics prepared by tape casting and lamination with castor oil, polyvinyl butyral(PVB) and di-n-butyl phthalate (DBP) as dispersant, binder and plasticizer, respectively. Thermo gravimetric analysis and Fourier transform infrared spectromer was used to examine the degradation of the binder system. The degradation behavior of the pure organics, single sheet and laminated B4C body were investigated. The results indicate that nitrog₄en was selected as the binder system removal atmosphere and two decomposition temperature ranges was obtained for organics. A model based on diffusion can be used to predict the binder system removal time for a certain thickness of laminated B₄C.

Abstract: Water-soluble binder based injection molding of submicrometer-sized and stabilized zirconia was reported in this paper. The binder phase is chosen as the mixtures of polyethylene glycol, high-density polyethylene, polyvinyl butyral and stearic acid. Binder removal is accomplished by a two-steped process. The water-soluble constituent is firstly removed by dissolution in the water and the remaining is removed through the followed thermal treatment. The apparent viscosities of different kinds of feedstock were tested. The influences of water-leaching time and temperature on the efficiency of PEG removal were discussed.