Articles
  • Effects of a combined supercritical extraction/thermal cycle on binder removal cycle time, yield, and residual carbon of multilayer ceramic capacitors
  • Brandon Abelna and Stephen J. Lombardoa,b,*
  • a Department of Chemical Engineering, University of Missouri, Columbia MO 65211, USA b Department of Mechanical & Aerospace Engineering, University of Missouri, Columbia MO 65211, USA
Abstract
A combined cycle, consisting of a supercritical extraction cycle (SCE) followed by a thermal cycle (TC), was used to remove binder from green multilayer ceramic capacitors. The dielectric was barium titanate and the binder consisted of poly(vinyl butyral) plasticized with phthalates. Supercritical extraction of approximately one-third of the binder leads to an increase in the porosity and gas permeability of samples and to a decrease in the adhesion strength between layers. The partial removal of the binder also resulted in a decrease in cycle time and defects following the combined SCE/TC. Samples subjected to the combined SCE/TC also had 25-30% less residual carbon as compared to samples subjected to a thermal cycle alone.

Keywords: Supercritical extraction, Binder, Residual carbon, Barium titanate, Multilayer ceramic capacitor

This Article

  • 2011; 12(5): 515-520

    Published on Oct 31, 2011

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