1. SICCAS visit - Background in TeO2 powder - Crystal dimension accuracy
Ioan Dafinei (Rome)
Andrea Giuliani (Como)
Eric Norman (Livermore)
Ezio Previtali (Milano)
Nu Xu (Berkeley)
- Background in TeO2 powder
- Crystal dimension accuracy
- Mass production and storage
Nu Xu
SICCAS, Shanghai, Nov , 2005

2. The Technical Process of TeO2 Raw Materials 二氧化碲原料处理工艺流程图
化学反应: 2Te+9HNO3 → Te2O3(OH)NO3+8NO2+4H2O
Chemical reaction: Te2O3(OH)NO3→2 TeO2+HNO3
HNO3 Te 洗涤
Washing
TeO2
化学反应: TeCl4+4NH4OH→Te(OH)4+4NH4Cl
Chemical reaction: Te(OH)4→TeO2+H2O 过滤
Filtration
化学反应: TeO2+HCl→TeCl4+H2O
Chemical reaction
HCl
NH4OH 洗涤
Washing 洗涤
Washing 离心
Removing water
干燥去
Dryness
Water sample and filter brought back to Milano for background check
Nu Xu
SICCAS, Shanghai, Nov , 2005

3. Preparing Pt Material ZengWei Ge Nu Xu
SICCAS, Shanghai, Nov , 2005

4. Pt Crucible
Nu Xu
SICCAS, Shanghai, Nov , 2005

5. Preparing Crystals
Nu Xu
SICCAS, Shanghai, Nov , 2005

6. Crystals Growing - 9 week/circle several TeO2 lower T to reduce Pt
Material
preparing
- 9 week/circle
several TeO2
lower T to
reduce Pt
Grew
crystals
Remove dirt
few months after contract
batches of TeO2 shipping possible
18-24 months to finish 1000
crystals
accuracy: 0.05mm
SINAP: 50m well mass storage
Nu Xu
SICCAS, Shanghai, Nov , 2005

7. Production Site - Jiading
CAS Shanghai branch
Scientific Satellite City: Jiading
- Nuclear research institute: SINAP
- SICCAS production site
- Shanghai University …
~ One hr. drive from downtown
Nu Xu
SICCAS, Shanghai, Nov , 2005

8. Summary SICCAS: professional, very cooperative
Site: Easy access, friendly people, good food
Nu Xu
SICCAS, Shanghai, Nov , 2005