I would like to ask some information about synthesis of perovskites.
In this synthesis, we first need to mix the raw materials together with the solvent. Then we need to heat the reaction mixture to dryness on a hot plate. After that, we can put the resulting powders in a furnace for firing. Finally, we can obtain a powder X-ray diffraction pattern of the product.
My question is why do we need to dry the mixture on a hot plate first? Why can't we just put the mixture into a furnace immediately?
My guess about the purpose of drying on a hot plate is to remove water inside the mixture. But if yes, we just put it into a furnace which can also remove the water molecules inside.... Or the furnace is used to compact the molecules inside more regularly, so as to form a clearer diagram in X-ray diffraction?