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The Investigation of ZrO2 Ceramic Molding and Composite Ceramic

Author: CaoHeKun
Tutor: XuWeiBing
School: Hefei University of Technology
Course: Materials Science
Keywords: ZrO2 ceramic feedstock molding debind sinter
CLC: TQ174.6
Type: Master's thesis
Year: 2009
Downloads: 227
Quote: 1
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Abstract


Ceramic injection molding has aroused wide attention from researchers because of advantages of producing high-precision, high value-added complex products. In this paper, feedstocks made of binder system and zirconia powder, molding, debinding and sintering were investigated,and their rheological properties were discussed.ZrO2 ceramic feedstocks were made of ZrO2 and thermoplastic binder system.In the mixing process,influence of choosing binder system, mixing time and mixing temperature to feedstocks were studied, and sensitivity of the different binder system feedstocks to temperature was researched by rheological experiment.The experiment result indicated the feedstock made of ZrO2 and thermoplastic PS-based binder system for 10 min at 125℃had good strength and surface and so on.Moreover it was less sensitive to temperature and was fit for ceramic injection molding.Then ZrO2 power of the feedstock was improved to 86% by experiment to decrease lacunas at debinding and sintering.The mixing feedstock was debinded in the maffle,the ranges of decomposed temperature were investigated by TG analysis,and the debinding curve was established,then were sintered at the different temperature,and surface was observed after debinding and sintering by TEM. The change of ZrO2 ceramic crystal structure was studied by XRD,and mechanics capability of ZrO2 ceramic was discussed at the different temperature. The result indicated there was better capability at 1550℃.The composite ceramic made of ZrO2 and the different percent Al2O3 was debinded and sintered,and the ceramic structure and capability were investigated by XRD,TEM and so on , furthermore material cost can be reduced.

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CLC: > Industrial Technology > Chemical Industry > Silicate > Ceramic Industry > Production process and equipment
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