THE EFFECT OF TEMPERATURE AND HUMIDITY ON THE ELECTRICAL RESISTANCE OF BORON NITRIDE NANO-PARTICLES**
Temperatures from 85 C down to 196 C (liquid nitrogen) were applied to commercially supplied boron nitride nano particles, ~70 nm APS (average particle size). A plastic PLA 3-D printed sample holder, with a platinum resistance temperature detector from Omega Engineering, was used to measure the dependence of the electrical resistance on temperature. The relative humidity in the cryostat was measured using a Honeywell HIH-4000 sensor. A custom made LabView virtual instrument measured and recorded the elapsed time, sample resistance, cryostat humidity, and sample resistance and rates of up to about 2 sets of readings per second. Sample resistance up to 100 MΩ A was measured directly. Using a known resistor in parallel with the sample extend the range of the results to up to 5,000 MΩ. The relative humidity in the cryostat varied from around 10% (achieved with an indicating desiccant, Drierite) up to 100% using a Digital Electronic Hygrostat from Incubator Warehouse. The data were analyzed with Excel software. The resistance of the sample increased with decreasing temperature and decreased with increasing humidity. Hysteresis was observed when the sample was cooled and then warmed.
Work supported by the Georgia Space Grant Consortium-NASA
BANKS, Trevor and DEMAYO, Ben
"THE EFFECT OF TEMPERATURE AND HUMIDITY ON THE ELECTRICAL RESISTANCE OF BORON NITRIDE NANO-PARTICLES**,"
Georgia Journal of Science, Vol. 77, No. 1, Article 127.
Available at: https://digitalcommons.gaacademy.org/gjs/vol77/iss1/127