Patent ID: 6627116
Filing Date: 2003-09-30
Classification: C04B,H01C,H05B

Abstract:
A method of producing a carbon heating element, comprising the steps of mixing a metal or metalloid compound with a composition exhibiting a carbon residual yield that is substantially not zero after firing, and firing the mixture at a pressure of no higher than 1Ã—10âˆ’2 Pa and a temperature of from 1500Â° C. to 2200Â° C., to thereby make a carbon heating element comprising carbon as a good electrical conductor, and containing as impurity elements iron at a content of no greater than 100 ppm, calcium at a content of no greater than 100 ppm, potassium at a content of no greater than 50 ppm and sodium at a content of no greater than 50 ppm.