| 摘要 |
1511601 Resistor material TRW Inc 9 March 1976 [21 March 1975] 09280/76 Heading C1M A resistor material comprises a mixture of 30-70% (by volume) of a glass frit and 70-30% of a conductive phase comprising a mixture of tin oxide and tantalum oxide, and/or a product obtained by heat treatment of tin oxide and tantalum oxide, the tantalum oxide constituting 0À5-50% by weight of the conductive phase. The said oxides may be mixed and heat treated by (a) heating to 1000‹ C. in N 2 for 1 hour, (b) heating to 1100‹ C in N 2 for up to 4 hours, or (c) heating to 525‹ C. in an inert gas for up to 10 minutes and then cooling, in the inert gas. The resistor material may be applied in conventional manner to a substrate (e.g. glass, porcelain, steatite, alumina or barium titanate) and fired at 850-1150‹ C. in N 2 . The glass is preferably a borosilicate (examples given). |
