I am currently processing an experiment using NaBH4 to etch the surface of my material.
I am finding a substrate material which is (1) not reactive to NaBH4 (or basic liquids), (2) stable in high temperatures (upto 1100 °C), and (3) not electronically conductive. It would be better if it is also affordable.
I used to use Al2O3 (sapphire substrate) but recently I figured out that it can react with NaBH4. Every feature without this reactivity should be similar to Al2O3.
Please suggest some.
Try the zirconium silicate (ZrSiO4) ceramic. This ceramic is quite resistant to alkali melts and, in contrast to ZrO2/Y2O3 ceramics, is electrically insulating at high temperatures.
You might consider using silicon carbide (SiC) as a substrate. It is stable at high temperatures, not reactive to NaBH4 or basic liquids, and non-conductive. Additionally, it's relatively affordable compared to some alternatives.
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