Gold leads to PRTs for monitoring high temperatures

J R Greenwood, P R N Childs, P Chaloner
1999 Gold Bulletin  
For some aerospace and automotive applications, it has been difficult to produce instrumentation for the harsh environments encountered. Problems include high temperatures, high centrifugal forces, corrosive exhaust gases, and potential damage from high velocity particulates. This paper reports the design and development of a thin film instrument for temperature monitoring. The device comprises two gold tracks for use as excitation leads, and a platinum resistance element, both applied to a
more » ... th applied to a chemically robust electrical insulator. The gold tracks were deposited using a commercial gold ink consisting of a solution of a gold mercapto balsamate complex in an organic solvent. Most of the organic solvent evaporates when the ink is applied, and the residual organic material is removed on fusion. Gold is the metal of choice because of its resistance to oxidation and the chemical and thermal stability of the films produced. Gold ink is particularly easy to apply, the process is readily controlled and no expensive equipment is required. This paper describes the application of the gold ink and the analysis of the films produced, along with a description of the sensor fabrication and performance.
doi:10.1007/bf03216615 fatcat:ksvwse55jjfcjbvj62wijmdmwi