Nu Xu SICCAS, Shanghai, Nov. 15-16, 2005 1
SICCAS visit
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. 15-16, 2005 2
The Technical Process of TeO2 Raw Materials
二氧化碲原料处理工艺流程图
Te
过滤Filtration
化学反应 : TeO2+HCl→TeCl4+H2O
Chemical reaction
洗涤Washing
TeO2
化学反应 : 2Te+9HNO3 → Te2O3(OH)NO3+8NO2+4H2O
Chemical reaction: Te2O3(OH)NO3→2 TeO2+HNO3
洗涤Washing
干燥去Dryness
离心Removing water
洗涤Washing
化学反应 : TeCl4+4NH4OH→Te(OH)4+4NH4Cl
Chemical reaction: Te(OH)4→TeO2+H2O
HNO3
HClNH4OH
Water sample and filter brought back to Milano for background check
Nu Xu SICCAS, Shanghai, Nov. 15-16, 2005 3
Preparing Pt Material
ZengWei Ge
Nu Xu SICCAS, Shanghai, Nov. 15-16, 2005 4
Pt Crucible
Nu Xu SICCAS, Shanghai, Nov. 15-16, 2005 5
Preparing Crystals
Nu Xu SICCAS, Shanghai, Nov. 15-16, 2005 6
Crystals Growing
Remove dirt
Grew crystals
Material preparing
- 9 week/circle- several TeO2
- lower T to reduce Pt
- 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. 15-16, 2005 7
Production Site - Jiading
Scientific Satellite City: Jiading
- Nuclear research institute: SINAP - SICCAS production site - Shanghai University … ~ One hr. drive from downtown
CAS Shanghai branch
Nu Xu SICCAS, Shanghai, Nov. 15-16, 2005 8
Summary
• SICCAS: professional, very cooperative
• Site: Easy access, friendly people, good food