Glass frit containing lead ruthenate or lead iridate in relatively uniform dispersion and method to produce same
US3951672A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1974 |
| Grant date | Apr 20, 1976 |
| Priority date | — |
| Expiry date | Nov 7, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2207/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Thick film resistive elements are prepared from an intimate admixture comprising silica, lead oxide and ruthenium dioxide or iridium dioxide which is heated to a temperature sufficient to provide a lead-containing glass having dispersed therein lead ruthenate or lead iridate. The lead-containing glass is comminuted and a resistor paste is formed which can be subsequently coated and fired on to a desired substrate to form the thick film resistive component. The method of this invention may facilitate the production of thick film resistors exhibiting a low temperature coefficient of resistivity, relative freedom from noise and drift, and high moisture resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.