Microwave synthesis of ceramic powders
Author: langfeng1 Time: 2017-12-13
The characteristics of a starting powder (composition, size, structure, shape, etc.) strongly affect the control over the sintering behavior, microstructural development, improved properties, and reliability of the final product. For this reason, there continues to be a significant effort to develop improved and tailorable powders to meet the increasing demands for a wide range of future, advanced ceramic products.
The application of microwaves to the synthesis of ceramic (oxide and nonoxide) powders is a recent and emerging development and offers some unique benefits, especially with respect to producing particles of submicron (nano) size with controlled compositions. Microwave synthesis of ceramic powders offers greater process flexibility by taking advantage of several
• Sol-gel Decomposition/Drying
• Solution Evaporation/Decomposition
• Gas-Phase Reactions
• Gas-Solid Reactions
• Solid-State Reactions
• Ceramic Precursor Pyrolysis
• Hydrothermal Reactions
• Reaction and Sintering
combinations of volumetric, rapid, and selective heating conditions, which are not possible by conventional means. All of these heating advantages can be used to process and tailor extremely fine (less than 1-μm diameter) powders by controlled reactions in sol-gel processing, gas-phase synthesis, solution evaporation/decomposition, or hydrothermal reactions.