Is this material a wonder material (Vanadium Dioxide)

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Discussion Overview

The discussion revolves around the properties and potential applications of vanadium dioxide (VO2), particularly its ability to conduct electricity while exhibiting a metal to semiconductor transition. Participants explore its implications for electronics and smart materials, as well as technical aspects related to its structure and behavior under different conditions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Experimental/applied

Main Points Raised

  • Some participants suggest that vanadium dioxide could revolutionize electronics due to its unique electrical properties, although others caution that heat flow is essential in electronics, potentially limiting its applications.
  • There is curiosity about the term "metallic" in relation to VO2, particularly regarding its transition from a metallic to a semiconducting state at specific temperatures.
  • Questions are raised about the role of oxygen in vanadium oxides, with references to its ability to lose oxygen reversibly upon heating, which may influence its properties.
  • One participant discusses applying VO2-based coatings for smart glazing products and considers the introduction of tungsten to modify transition temperatures and improve optical properties.

Areas of Agreement / Disagreement

Participants express differing views on the practical applications of vanadium dioxide in electronics, with some seeing potential and others highlighting limitations. The discussion remains unresolved regarding the best approaches to enhance its properties and applications.

Contextual Notes

Some statements rely on specific conditions, such as temperature and structural changes, which may not be universally applicable. The discussion includes references to various studies and articles that may not fully align in their conclusions or interpretations.

Who May Find This Useful

Researchers and practitioners in materials science, electronics, and engineering, particularly those interested in smart materials and phase transition phenomena.

wolram
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https://www.sciencedaily.com/releases/2017/01/170126142816.htm

While there are a handful of other materials besides vanadium dioxide that can conduct electricity better than heat, those occur at temperatures hundreds of degrees below zero, making it challenging to develop into real-world applications, the scientists said.

If this material is as good as they say if it is I can see a revolution in electronics.
 
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You need heat flow in electronics: the waste heat has to get out.
There are certainly applications, but computer chips are not among them.
 
I'm curious about the adjective metallic, which is interesting.

In the Wikipedia article on V(IV)O2, there is the statement: "At the rutile to monoclinic transition temperature, VO2 also exhibits a metal to semiconductor transition in its electronic structure: the rutile phase is metallic while the monoclinic phase is semiconducting."
Ref: Goodenough, John B. (1971-11-01). "The two components of the crystallographic transition in VO2". Journal of Solid State Chemistry. 3 (4): 490–500.
https://en.wikipedia.org/wiki/Vanadium(IV)_oxide

So I suppose the reference to metal or metallic relates to the metal to semiconductor transition.

Does this have to do with how weakly it holds oxygen? There are several statements on various sites about V oxides readily give up oxygen, reversibly, upon heating. For example, "Loses oxygen reversibly on heating." Ref: CRC, Dictionary of Inorganic Compounds, edited by Jane E. Macintyre, p. 3721.

Also see - Vanadium Dioxide: Metal-Insulator Transition, Electrical Switching and Oscillations. A Review of State of the Art and Recent Progress
https://arxiv.org/ftp/arxiv/papers/1601/1601.06246.pdf
 
Hi

I'm applying a vo2 based coating on an sio2 substrate as a model for smart glazing based products. I am introducing tungsten into the lattice to lower the Tc, but thinking about how else to improve the optical properties?
 

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