Community Research and Development Information Service - CORDIS

Manufacture of homogeneous precursor rods

Merck¿s responsibility in this working task is the manufacture and development of encapsulated precursor rods with high homogeneity in density and establishment of quality control test.

The main goals for this task was to avoid powder contamination, to work on better batch to batch reproducibility leading to improved tape filament homogeneity and more Ic uniformity.

To improve the reduction of powder contamination (esp. carbon dioxide from air) we have developed:
- Fully encapsulated rod manufacturing process
- Fully encapsulated rod handling
- Fully encapsulated rod transportation
- Qualified packages for protection of powder rods. Two designs for packages of CIP rods were tested:
-- Aluminium tube with thread and cap with rubber O-ring
-- Glass tube with plastic plugs and aluminium foil inside

For the qualification of the new packages different properties have to be checked:
- Transportation and handling properties
- Protection against breakage
- Sealing of package and long term stability
- Potential contamination sources of all material used in packages.

Reported by

Merck KGaA, Damstadt
Werk Gernsheim, Mainzer Strasse 41
64579 Gernsheim
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