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Today’s objectives-Powder and advanced ceramics processing techniques ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Know the basic concepts behind fabrication and use of three of these
Cements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
More cement ,[object Object],http://matse1.mse.uiuc.edu/~tw/concrete/prin.html ,[object Object],[object Object]
Powder processing •  Procedure: --grind to produce ceramic and/or glass particles --inject into mold --press to improve density by better packing (ideally close packed) --sinter at elevated temperature to further densify by shrinking pores •  Sintering : useful for both clay and non-clay compositions. •  Compare powder processing to working with clay: PARTICULATE FORMING ,[object Object],[object Object],[object Object],[object Object]
Pressing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Stages of sintering ,[object Object],[object Object],[object Object],[object Object],[object Object],Somewhat like clays, but little if any glass.
Powder processing microstructure ,[object Object],[object Object],[object Object]
Pressing Applications ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
TiO 2 -Dupont ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],http://www.roskill.com/reports/titaniummap http://www.pcimag.com/CDA/ArticleInformation/features/BNP__Features__Item/0,1846,115639,00.html
TiO 2 - from WikiPedia (!) ,[object Object],[object Object],[object Object]
Refractories ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Sol-Gel processing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],http://www.rpi.edu/dept/materials/COURSES/NANO/mcmanus/body/solgel.html Thickness=C/speed ½
Biomimetic ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Single Crystal processing ,[object Object],[object Object],[object Object],[object Object],[object Object],http://www.hait.ac.il/staff/reuvend/micro/3p.pdf http://www.tocera.co.jp/egtop.html Most common method for semiconductor substrates, but also optical materials.
Single crystal from polycrystalline bulk. ,[object Object],[object Object],Polycrystalline raw materials Ultra pure single crystal
SUMMARY ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Reading for next class Optical Fiber processing Chapter sections: Handout Know the basic concepts behind fabrication and use of three of these

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Lecture 07

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