C04B 35/493

Shaped ceramic products characterised by their composition ; Ceramics compositions ; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, {zircon} or hafnates containing also titanium oxides or titanates based on lead zirconates and lead titanates {, e.g. PZT} containing also other lead compounds