Solid State Reaction Ceramic Method

The solid state reaction method or ceramic method is a well known processing route for obtaining thermodynamically stable phases at high temperatures through solid state diffusion.

Solid state reaction ceramic method. Solid state reaction method ssr. Solids do not react with solids at room temperature even of thermodynamics is favorable. In this approach solid precursors are intimately grounded in stoichiometric quantities. Solids do not react together at room temperature over normal time scales and it is necessary to heat them to much higher temperatures often to 1000 to 1500 c in order for the reaction to occur at an appreciable rate.

The characteristics of starting constituents are retained and the desired mixture is formed. The standard ceramic route the easiest way to make many solid state materials is direct reaction of their components at high temperatures pbo tio2 900oc pbtio 3 grind mix powdered reactants press into a pellet and heat. To obtain for example al 2 mo 3 o 12 from binary oxides it is necessary to have a local 1 3 stoichiometry of al 2 o 3 to moo 3. The solid state reaction route is the most widely used method for the preparation of polycrystalline solids from a mixture of solid starting materials.

Molten salt synthesis is a modification of the powder metallurgical method. Ceramic method direct reaction of solids to form the final product in principle no decomposition is involved. High temperature must be used. Synthetic method water assisted solid state reaction wassr method 21 the wassr method is a very simple and low cost method specifically synthesizing many ceramic materials just by storing a mixture of raw materials.

Ceramic powders are prepared from solid liquid and gas phases by various methods rahaman 2003. Traditionally a high temperature ceramic synthesis also denoted as ceramic method or shake and bake is used to prepare inorganic solids. Engineering study materials 14 059 views 3 37. Sol gel process steps for fabrication of ceramic matrix composites engineering study materials duration.