ABSTRACT
This chapter focuses on the solid-state diffusion, co-precipitation, sol-gel, and combustion methods, which are the most popular synthesis techniques, used for preparation of any shape and size product from the last few decades. Generally, for the synthesis and development of new and advanced multi-functional phosphor materials, novel synthesis techniques are required. In solid-state method individual metal oxides, carbonates, or nitrates are taken as starting materials to obtain the desired phase, and some flux is used to increase the rate of reaction, because this method requires a higher temperature than other conventional methods used for phosphor synthesis. Precipitation method is also a simple synthesis technique for the preparation of phosphor materials. In this method, the molecular motions and the chemical reaction may proceed very swiftly in the liquid state. The sol-gel process is another wet chemical method for producing nanomaterials. This method is used for the fabrication of metal oxide nanoparticles, especially the oxides of silicon and titanium.
