Spectroscopic determination of thermal impulse in sub-second heating events using lanthanide-doped oxide precursors and phenomenological modeling
Abstract
Using a mixture of crystalline-Ho:ZrO2, precursor-Dy:Y2O3, and precursor-Eu:ZrO2 nanoparticles we develop thermal impulse sensors capable of measuring equivalent isothermal temperatures and durations during a heating event, with response times of <100 ms, and a temperature range of at least 673 K to 1173 K. In order to determine the temperature and duration from the sensors after the heating event we measure the sensors' fluorescence spectrum, which is then compared with lab based calibration data. By using two precursor materials with different reaction kinetics we are able to extract both temperature and duration. Based on blind sample testing we find that the sensors and calculation method are accurate for measuring temperature and duration, but currently suffer a lack of precision due to difficulties in producing homogeneously heated samples.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 23, 2016
- Source ID
- 10.1063/1.4961418
Entities
People
- Benjamin R Anderson
- Hergen Eilers
- Patrick Price
- Ray Gunawidjaja
Organizations
- Defense Threat Reduction Agency
- Washington State University