| Topic: |
Science > Physics |
| User: |
"Sam Wormley" |
| Date: |
20 Aug 2004 10:25:01 PM |
| Object: |
When it's hot... |
Ref: http://www.sciencenews.org/articles/20040821/fob7.asp
Some window coatings reflect heat. Unfortunately,
they also keep out the sun's warmth when outside
temperatures are chilly. Now, chemists in England
have created a window coating that automatically
transforms into a heat mirror only when warmed above
room temperature. The material is made of vanadium
dioxide imbued with traces of tungsten.
Compared with clear glass, the film in its
heat-reflecting state could reduce by up to half the
amount of room heating due to infrared radiation,
estimates Ivan P. Parkin of the University College
London. He and Troy D. Manning of Liverpool
University in England describe their new coating in
the Aug. 11 Journal of Materials Chemistry.
See: http://www.sciencenews.org/articles/20040821/fob7.asp
.
|
|
|
Related Articles |
|
|
