Ferroelectric ceramic material

Details Ferroelectric ceramic material Ferroelectric ceramic material

C - Chemistry, Metallurgy

04

B

C04B 35/46 (2006.01) B41C 1/10 (2006.01) C04B 35/499 (2006.01)

Patent

CA 2178761

A ferroelectric ceramic material consists of a ceramic perovskitic mixed crystal which comprises a mixture of at least one component selected from the group consisting of PbTiO3, BaTiO3, Pb(Fe1/2Nb1/2)O3 and Pb(Zn1/3Nb2/3)O3, with at least one component selected from the group consisting of Pb(Mg1/3Nb2/3)O3, Pb(Ni1/3Nb2/3)O3, Pb(Fe2/3W1/3)O3 and Pb(Mn1/2Nb1/2)O3. The proportions of the components are determined according to the following equation: ? Xi x Tci = TcM i = 1 where Xi is the mole fraction of each i-component, Tci is the Curie point of the i-component and TcM is the Curie point of the mixture of components between 50°C and 100°C. The ferroelectric ceramic material according to the invention has a coercive force of less than 200 V/mm and is used for the storage of information in electrostatic printing processes.

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