Abstract: A novel sol-gel particle-coating technique was developed to form a thin glassy layer on the surface of PZN particles. Two types of
powders with different Curie temperatures were used as high-temperature constituent and low-temperature one to prepare PZN-based composite ceramics.
A PZN-based diphasic ceramic with X7R character and high dielectric constant was successfully obtained at low sintering temperature.
The results show that the particle-coating method is effective to lower sintering temperature of the composite ceramics and suppress the reaction
between the two starting constituents.

Key words: lead zinc niobate, diphasic ceramics, particle-coating technique, dielectric properties, X7R character