METHOD FOR ELIMINATING CARBON CONTAMINATION OF PRECIOUS METAL COMPONENTS

PURPOSE: An elimination method of carbon contaminant from element of metals for jewelry is provided to reduce carbon contaminant of discrete component of a molten glass transmission system. CONSTITUTION: An elimination method of carbon contaminant comprises the following steps: offering a first plat...

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Bibliographische Detailangaben
Hauptverfasser:	LINEMAN DAVID M, GOLLER MARTIN H, MOSHIER STEVEN R
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	CHEMISTRY FERROUS OR NON-FERROUS ALLOYS GLASS MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES METALLURGY MINERAL OR SLAG WOOL PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PURPOSE: An elimination method of carbon contaminant from element of metals for jewelry is provided to reduce carbon contaminant of discrete component of a molten glass transmission system. CONSTITUTION: An elimination method of carbon contaminant comprises the following steps: offering a first platinum-containing metal member which contains more than 3ppm of carbon concentration; heating the first platinum-containing metal member at specific temperature and time which are effective for reducing carbon concentration to less than 3ppm; overlapping the first and second platinum containing metal members in order to form an assembly which has a first empty space formed in between the first and second platinum containing metal members. The first platinum-containing metal member is heated for more than 12 hours at higher than 1200deg.C in an environment containing more than 20% of oxygen in volume.