Is it possible to control the real causes of the transition phenomenon to improve or make more efficient in building materials or applications such as tension sensors?
I recommend poster 16, it was worked with vanadium, some interest could arise for both
Celene said…
Thanks for the comments. Yes, we will want use it for mitigate or eliminate the used of air conditioners and heaters. Yes the VO2 have a storage capacity thermal very good and its change of phase is solid-solid in comparation with the paraffin that present a change solid-liquid the affect the properties mechanical of the building materials.
Celene said…
Is the phase pure but we were able to obtain with a heat treatment since after the synthesis por hidrotermal the product still had a mixture of phases, however many report the synthesis with the use of treatments greater than 400 degrees and with an argon atmosphere. We were able to achieve it with a treatment thermal from 300 in an atmosphere of vacuum, so it is more varate and simple.
Celene said…
The VO2 of vanadium has a certain heat capacity, however it has been observed that by reducing the size or adding some impurities or other materials, both the Cp and other thermal properties can increase
Celene said…
Yes, it has already been doped and a reduction in phase change temperature has been observed. It has been doped with sodium, potassium but the most used is tungsten.
Celene said…
Thanks so much, I will check it
Celene said…
Really the phase change from monoclinic to rutile is controllable, it depends on the temperature that is supplied, if the supplied temperature is not that of the phase change, it does not change. On the other hand, the phase change temperature can be reduced if the VO2 is doped with tungsten, sodium or potassium and thus can be used in this type of application
Comments
Is the phase obtained pure or is there another phase along with it?
What does the heat storage capacity of VO2-M depend on the phase change or on the expansion or contraction of the lattice or on impurities?
Is it possible to control the real causes of the transition phenomenon to improve or make more efficient in building materials or applications such as tension sensors?
excellent work