I think you can use oxides as raw materials, those are soluble in nitric acid to form nitrate of the metal. You can always use carbonates for the purpose as they are always soluble in nitric acid.

of course. you can use any oxides if no any corrosion on your crucible and euqipment.

thank you all, appreciated

Please consider that "mixture of salts" and "glass" are different things.

Any mixture of oxides melts lower than pure oxides. If you heat carbonates, hydroxides, sulfates, nitrates etc salts enough high, the anion gasifies and only oxide remains, resulting a glass.

Mixing low melting salts without heating to decomposition results an ionic liquid. That is completely different class of materials.

For glass, there is no difference whether it is made via sol gel or crude mixture, maybe only melting time.

The more different oxides you mix, the lower will be the melting point of resulting glass.

Dear Sir Neeme Vaino

For antibacterial property, silver oxide was doped into glass composition (in the place of Na2O) by sol-gel synthesis. Silver nitrate was used as raw material for Ag2O. But in some papers, why only Ag was found in XRD? Should be Ag2O or Ag?

How can AgNO3 change to Ag2O to Ag?

Could you share your opinion?

Silver nitrate and oxide decompose easily, that is how metal is refined from the ore in first hand.

In glass, only surface Ag is biologically active, the rest is wasted.

For economy, use surface treatment with silver instead.