臺灣博碩士論文加值系統

脫脂製程(Debinding Process)為整個陶瓷製程中最易產生缺陷與變形的步驟. 簡言之,一個完整的陶瓷製程其成敗有很大一部份決定在脫脂製程. 因而本研究旨在針對脫脂製程之相關參數對脫脂效率的影響加以探討,同時並量測、觀察Shrinking unreacted core boundary之位移及該模型在本研究中的適用性.

Chapter 1.
Introduction
Chapter 2.Review
2.1Ceramic injection molding
2.2ZrO2
2.2.1Crystal structure
2.2.2Martensitic transformation in ZrO2
2.2.3Toughening mechanism
2.2.4Alloy additives in ZrO2 and Y-TZP
2.3The removal of the binder
2.3.1Pores and capillary force
2.3.2Mechanisms of debinding process
2.3.2.1Thermal debinding
2.3.2.2Solvent debinding
2.3.3Shrinking unreacted core model
2.3.3.1Chemical reaction controlled
2.3.3.2Diffusion controlled through product layer
2.3.3.3Both chemical reaction and diffusion reaction control
2.3.4
Pyrolytic mechanisms and effect of atmosphere
Chapter 3.Experimental processes and methods
3.1Samples
3.1.1Forming
3.1.2Properties of greens
3.2Analysis of molded compacts
3.2.1Thermal analysis
3.2.2Density
3.2.3The total amount of binders in LPIM greens
3.3Wicking materials
3.3.1Properties of various wicking materials
3.3.2Thermal analysis
3.3.3Appearance and Particle sizes
3.4The sample preparation for the removal process
3.5The measurement of products after debinding
3.5.1Weight loss
3.5.2
Appearance and Microstructure
Chapter 4.Results and Discussion
4.1The properties of green compacts
4.1.1TGA analysis
4.1.2DSC analysis
4.1.3The total amount of binders in green compacts
4.2Debinding efficiency under various factors
4.2.1Wicking materials
4.2.2Atmospheres
4.2.3Heating rate
4.2.4Surface area
4.3The characteristics of interface between unreacted and reacted zone
4.3.1Shrinking unreacted core model and oxidative degradation
4.3.2The displacement of interface
4.3.3The application of shrinking unreacted core model
4.3.4
The relationship between interface displacement and debinding efficiency
Chapter 5.
Conclusions
References

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