Forcing a chemical reaction from solid starting materials to create a new solid with a clear structure is known as solid-state synthesis, often known as the ceramic technique. End products include thin-film materials, single crystals, glasses, and polycrystalline materials, all of which are widely employed in the energy and electrical industries. Fine-grain metal compounds are mixed, pelletized, and heated for a certain amount of time at a set temperature. In order to start reactions in a molten flux or a quickly condensing vapour phase, some metal compounds, such metal oxides or salts, need extremely harsh conditions, including high temperatures and pressure. Chemistry is a term that is frequently used to describe this procedure. In solid state synthesis, it's crucial to describe the reaction rate.