Sachin K C

There is no other grinding method after the synthesis of nanoparticles by the salt-gel method. Pay attention to the sintering process. Its purpose is to remove water from hydroxides. No need to exceed temperature. Perhaps you used such a temperature that the product of the reaction mixture melted.

Once you’ve dried the product, you no longer have a system with free, discrete, independent particles < 100 nm... that is, the system isn’t ’nano’. Is the SSA > 60 m2/g?

Hi

Yes. you need to do it to get ultra fine partciles after sol-gel process. moreover this will workout fair for ceramics.

Yes as V R Arun praksh said you must grind to get ultrafine nanoparticles. If you have large amount of material you can go for ball milling which will reduce your effort and time.

It depends on the method and temperature that you are using for the drying. But anyway if you are getting a clotted product after the drying process you have to grind them to obtain nano particles. As Rohit R C mentioned you can use disc milling or ball milling to grind which will save your both time and effort.