Title:
METHOD FOR MANUFACTURING TANTALUM CARBIDE FILAMENT AND METHOD FOR MANUFACTURING TANTALUM CARBIDE LIGHT BULB
Document Type and Number:
Japanese Patent JP2015098634
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a tantalum carbide light bulb having a tantalum carbide filament capable of preventing damage, such as disconnection.SOLUTION: A method for manufacturing a tantalum carbide light bulb comprises: a preliminary carburization step 101 of incompletely carburizing a tantalum filament by putting the tantalum filament into a vacuum carburizing furnace and heating it by a heater under an atmosphere of hydrocarbon containing gas to obtain a tantalum carbide filament; a filament brazing connecting/fixing step 102 of fixing the tantalum carbide filament to the lead wire of a stem by brazing; a bulb sealing/fixing step 103 of sealing/fixing the bulb in the stem; a complete carburization step 104 of completely carburizing the tantalum carbide filament by energizing and heating the filament under an atmosphere of hydrocarbon containing gas; and a hermetic seal step 105 of hermetically sealing the bulb by hydrogen containing inert gas.
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Inventors:
SUZUKI SHIGEO
Application Number:
JP2013239913A
Publication Date:
May 28, 2015
Filing Date:
November 20, 2013
Export Citation:
Assignee:
STANLEY ELECTRIC CO LTD
International Classes:
C23C8/20; H01K3/02; H01K3/06; H01K3/12
Domestic Patent References:
| JP2010530604A | 2010-09-09 | |||
| JP2007512663A | 2007-05-17 | |||
| JP2008081362A | 2008-04-10 | |||
| JP2005068002A | 2005-03-17 | |||
| JP2011153378A | 2011-08-11 |
Attorney, Agent or Firm:
Shozo Igarashi