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

2. 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

3. YAG Ceramics–Solid-state Reaction3

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

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

6. 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 oC
Solubility in water
decomp 6

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

8. 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

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

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

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

12. Cr:YAG Ceramics–Annealing Effects12

13. YAG Ceramic Cladding 13

14. YAG Ceramic Cladding
YIG 14

15. Composite Nd:YAG Ceramics15

16. Thank you for your attention.