Topic Report YAG ceramic forming Chien-Chih Lai 07/ 19/ 2012.

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Presentation transcript:

Topic Report YAG ceramic forming Chien-Chih Lai 07/ 19/ 2012

Outline Nd:YAG ceramics – Solid-state mixing -- preparation flowchart -- role of binders on optical properties Cr:YAG ceramics – Wet chemicals -- preparation flowchart -- annealing effects Ceramic cladding -- single crystallization by sintering

YAG Ceramics–Solid-state Reaction 3

YAG Ceramics–Solid-state Reaction 1. Single crystal 2. Ceramics sintered @ 1800 oC (1-mm thick) 3. Ceramics sintered @ 1700 oC (1.5-mm thick) 4. Ceramics sintered @ 1700 oC (1-mm thick) 5. Ceramics sintered @ 1600 oC (1.5-mm thick) 4

Nd:YAG Ceramics–Solid-state Mixing CIP: cold isostatic pressing 5

TEOS (tetraethly orthosilicate, 矽酸四乙酯) Si(OC2H5)4 Properties Formula SiC8H20O4 Molar mass 208.33 Appearance colourless liquid Density 0.933 g/mL at 20 oC Melting point -77 oC Boiling point 166-169 oC Solubility in water decomp 6

Optical Properties of Nd:YAG Ceramics 1750 oC under vacuum 7

Role of TEOS on Nd:YAG ceramics Si-undoped 1.2- and 7.2-at% Nd:YAG ceramics Si-undoped 7.2-at% Nd:YAG ceramics 7.2 at% 1.2 at% Y1-xNdxAlO3 8

Role of TEOS on Nd:YAG ceramics (a) Si undoped (b) Si (930 ppm), 1.5 TEOS mass % Various TEOS compositions 9

Role of MgO on Al2O3 Ceramics Doped w/ 250-ppm MgO Appearance 10

Cr:YAG Ceramics–Wet- Chemical Technique Chlorides (YCl3·6H2O, AlCl3·6H2O) 1750 oC vacuum 1200 oC 11

Cr:YAG Ceramics–Annealing Effects 12

YAG Ceramic Cladding 13

YAG Ceramic Cladding YIG 14

Composite Nd:YAG Ceramics 15

Thank you for your attention.