A novel facility for ageing materials with narrow-band ultraviolet radiation exposure
- Aalto University, School of Science and Technology, Metrology Research Institute, P.O. Box 13000, FI-00076 AALTO (Finland)
- Finnish Meteorological Institute, R and D / Climate Change, P.O. Box 503, FI-00101 Helsinki (Finland)
- Elastopoli Ltd., Nokiankatu 1, FI-38210 Sastamala (Finland)
A facility for exploring wavelength dependencies in ultraviolet (UV) radiation induced degradation in materials has been designed and constructed. The device is essentially a spectrograph separating light from a lamp to spectrally resolved UV radiation. It is based on a 1 kW xenon lamp and a flat-field concave holographic grating 10 cm in diameter. Radiation at the wavelength range 250-500 nm is dispersed onto the sample plane of 1.5 cm in height and 21 cm in width. The optical performance of the device has been characterized by radiometric measurements. Using the facility, test samples prepared of regular newspaper have been irradiated from 1 to 8 h. Color changes on the different locations of the aged samples have been quantified by color measurements. Yellowness indices computed from the color measurements demonstrate the capability of the facility in revealing wavelength dependencies of the material property changes in reasonable time frames.
- OSTI ID:
- 22062241
- Journal Information:
- Review of Scientific Instruments, Vol. 82, Issue 2; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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