Printable tiny thermocouple by liquid metal gallium and its matching metal
Abstract
Direct printing of thermocouples by the liquid metal was proposed. The fabricated temperature sensor composed of gallium and its matching metal exhibited excellent linear dependence between thermoelectric voltage and temperature within the range from 0 to 200 °C. Further, it was disclosed that liquid metals with high purity could be used for high precision thermocouples with tiny size, which were quite convenient to be used in micro channel measurement due to their fluidity in making sensors; while liquid metals with a small amount of oxides were handy for depositing on the substrate by "hand-written" style, with thin film thickness of approximately 50 μm.
- Publication:
-
Applied Physics Letters
- Pub Date:
- August 2012
- DOI:
- 10.1063/1.4746397
- Bibcode:
- 2012ApPhL.101g3511L
- Keywords:
-
- gallium;
- microchannel flow;
- temperature sensors;
- thermocouples;
- thermoelectricity;
- 07.20.Dt;
- Thermometers