Method for determining eta phase copper
US6425850B1 · kind B1 · utility
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9References
35Claims
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Key dates
| Filing date | Apr 20, 2000 |
| Grant date | Jul 30, 2002 |
| Priority date | — |
| Expiry date | Apr 20, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/2028
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A proportion of Cu3Si in a contact mass is determined by treating the mass with an inorganic ammonium salt, which selectively dissolves all forms of copper including free copper in deference to Cu3Si, which is not dissolved. An initial copper content of the contact mass is determined, the contact mass is treated with an inorganic ammonium salt composition to extract copper in a molecular form other than Cu3Si and extracted copper is subtracted from the initial copper content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.