Hello everyone.
I need ideas on how to reduce the sintering temperature (presently 1050°C) of a newly synthesized solid electrolyte (a lithium based oxide) in order to form a catholyte (without initiating an irreversible reaction between the electrode and cathode) and I was wondering if anyone has any insight that could be of help. I have thought about sintering aids such as lithium metavanadate, lithim carbonate, etc., but they reduced the conductivity of the electrolyte. Apart from using a cold sintering approach, I would appreciate any/every insight on innovative ways to reduce the sintering temperature. Thanks in anticipation.
You can use PVA is a polymeric binder, 1-3 % wt It is frequently used first in ceramic slurries to increase resistance to cracking during drying or mixed with dry powders to increase mechanical resistance in the green state. The sintering temperature can be also reduced with this process.
PVA starts decomposing at T near 600 ºC, so much lower than the sintering temperature of the ceramic material. It can produce additional porosities in your compound and then the triple-phase-boudaries TPB.
@Adel Madani, Thanks very much for your response. Will it be possible to achieve this with PVA or any other means without creating additional porosities and still having it in a phase-pure state?
@Vadim S. Gorshkov, thanks very much for your contribution. For an interface study where it is undesirable to sinter the cathode with the electrolyte at high temperature due to undesirable reaction that may occur, how can a good electrolyte-cathode interface he achieved without really compromising the the conductivity?
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