SICCAS visit - Background in TeO2 powder - Crystal dimension accuracy

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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. 15-16, 2005

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. 15-16, 2005

Preparing Pt Material ZengWei Ge Nu Xu SICCAS, Shanghai, Nov. 15-16, 2005

Pt Crucible Nu Xu SICCAS, Shanghai, Nov. 15-16, 2005

Preparing Crystals Nu Xu SICCAS, Shanghai, Nov. 15-16, 2005

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. 15-16, 2005

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. 15-16, 2005

Summary SICCAS: professional, very cooperative Site: Easy access, friendly people, good food Nu Xu SICCAS, Shanghai, Nov. 15-16, 2005

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