Rate Controlled Debindering of Glass Ceramic Composites

Stefan Reinsch; Martin Gaber; Ralf Müller; Wolfgang A. Schiller

doi:10.4028/www.scientific.net/AMR.39-40.583

Paper Titles

Properties of Glass Surface with Nano-Particles Aluminum Compounds Refined
p.567

Defects of Golden and Luster Decorations on Glass
p.571

Fast and Accurate Simplified Radiative Model for Modeling Coupled Heat Transfers in Glass Forming Process
p.575

The Permanently Bonded Glass Decor from Chemical Precursors
p.579

Rate Controlled Debindering of Glass Ceramic Composites
p.583

Analysis of Tableware Mouth Impact Strength
p.587

Recent Problems in Glass Melting from the View Point of Refractory and its Solutions
p.593

Boundary Layers Refractory/Glass Melt and Glass Defects
p.601

The Microstructure of Fused Cast AZS Materials before, during and after the Use for Glass Melting
p.607

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Rate Controlled Debindering of Glass Ceramic Composites

Abstract:

Green compacts of ceramics, glass ceramic composites and sinter glass ceramics contain different amounts of organic materials added as pressing aids or binders. Before sintering, these organics have to burn out completely. In oxidising atmospheres, the debindering process is mostly exothermic and therefore difficult to control. This uncontrolled heat production due to locally enhanced debindering and respective gas release may cause damages in the green compact microstructure. Therefore, debindering is usually operated with very low heating rates (< 3 K/min) which requires long processing times of many hours. In this paper, we will show that it is possible to reduce the processing time for debindering dramatically by using the decomposition rate of the organic binder, detected by the weight loss of the sample, as a control factor of the furnace.