Dear all
I need to know the dielectric strength of minerals i.e. kaolinite, feldspars and quartz where can I find them? I found some of them but they are not consistent. Thank you in advance.
Kind regards,
Wirat
Dear Wirat,
usually such materials are characterized by dielectric strength in the order of 10^5-10^7 V/cm.
However, I guess that you asked this question thinking about flash sintering of porcelain (you listed the raw materials).
Hence, it should be underlined that the dielectric strength in a green body is significantly lower than the theoretical one (because of the presence of porosity).
Additionally, when you reproduce FS experiment the sample temperature is much higher than room temperature (usually used for measuring dielectric strength), and this reduces the dielectric strength. I.e. the dielectric strength of alumina at 1200°C is a couple of order of magnitude lower than at room temperature.
Finally, the presence of porosity enhances the local field strength at the ceramic/air interface.
If your interest was focused on FS, you may find interesting these works:
http://www.sciencedirect.com/science/article/pii/S0955221912001446
http://aip.scitation.org/doi/abs/10.1063/1.4964811
Ciao,
Mattia
Dear Dr Edgar Berrezueta
Thank you so much, those papers are so good.
Best regards,
Wirat
Hey Mattia
Yes, I am inspired by your work! and I know the dielectric strength of minerals is much lower as elevated temperature compared with room temp. But still, I need to know at least the values at room temperature. Thank you so much!.
Ciao
Wirat
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