Does anyone here has experience with CaCu3Ti4O12? I have a lot of
questions about this ceramic material, but I will ask one by one.
First off, I am new to material science and sol-gel technology, so please consider me as a newbie (treat me like one too
I am interested in this material because it has extremely large
relative permitivity. I know that it has to be prepared following certain
quite stringent procedure in order to achieve that, be it sol-gel
or any other techniques.
My main objective is to coat a layer of this ceramic on a steel sheet
or tube of about 1mm thick or around that. It became apparent to me that
sol-gel is not the way to go. I wonder if plasma spray or HVOF is a
better way. I need your input. I found some articles show that thermal spraying technique does not yield good relative permitivity. I need your opinion.
Second, I was told that most ceramics are porous. Is this perovskite porous?
Third, I need to know your opinion about the route to prepare. I have a couple articles and they suggest:
1) Ca(NO3)2.4H2O + Cu(NO3)2.4H2O + Titanium(diisoproproxide) bis(2, 4-pentanedionate) 75 wt% in 2-
2) Ca(NO3)2·4H2O + Cu(NO3)2·2.5H2O + TiO2 + are used as starting raw materials. Glycine (NH2-CH2-COOH) is used a oxidizer and fuel.
3) Titanium butoxide [Ti(OC3H7)4] in 2-ethyl heaxanoic acid followed by addition of monohydrated calcium acetate [Ca(C2HO2)2 · H2O] and monohydrated copper acetate [Cu(OOCCH3)2· H2O] at room temperature.
The third is prepared as sol-gel whereas the first two are not. Can they also be used for sol-gel? The second can cause (mentioned in the article) combustion when the solution is heated. Is this dangerous? Hope it is not explosion kinda combustion.