An analysis of heterophase states was carried out for ferro-active solid solutions of the system(1-x-y)NaNbO_(3)-x KNbO_(3)-y CdNb_(2)O_(6).A complete stress relief at interfaces between phases in solid solutions with...An analysis of heterophase states was carried out for ferro-active solid solutions of the system(1-x-y)NaNbO_(3)-x KNbO_(3)-y CdNb_(2)O_(6).A complete stress relief at interfaces between phases in solid solutions with y=0.05 and x=0.10,0.40,and 0.45 is realized at the single-domain state of the tetragonal and orthorhombic phases.In solid solutions with y=0.05 and x=0.05 and 0.20,as well as with y=0.075 and 0.10,and x=0.15,the formation of a planar interphase boundary being parallel to a zero-net-strain plane occurs at the elastic matching of the single-domain tetragonal and polydomain orthorhombic phases.In contrast to this,at y=0.05 and x=0.25,0.30,and 0.35,the complete stress relief is associated with a co-existence of the single-domain orthorhombic and polydomain tetragonal phases,however in some cases,the tetragonal phase aims at a monodomainization.展开更多
The paper reports results on the complex study on ferroelectric ceramics that represent solid solutions containing components with a perovskite-type or columbite-type structure.Solid solutions of a three-component(1−x...The paper reports results on the complex study on ferroelectric ceramics that represent solid solutions containing components with a perovskite-type or columbite-type structure.Solid solutions of a three-component(1−x−y)NaNbO_(3)−xKNbO_(3)−yCdNb_(2)O_(6) system are manufactured at x=0.05-0.20 and y=0.10.Domain structures in ceramic grains are studied.The consistency between experimental and calculated results is examined for coexisting phases split into non-180°domains(mechanical twins)in the solid solution with x=0.15.A correlation between the internal structure(crystal,domain,granular,and defect)and fundamental electromechanical and polarization properties is stated for the studied three-component solid solutions.展开更多
基金support of the Ministry of Science and Higher Education of the Russian Federation(State task in the field of scientific activity in 2023)Project No.FENW-2023-0010/(GZ0110/23-11-IF).
文摘An analysis of heterophase states was carried out for ferro-active solid solutions of the system(1-x-y)NaNbO_(3)-x KNbO_(3)-y CdNb_(2)O_(6).A complete stress relief at interfaces between phases in solid solutions with y=0.05 and x=0.10,0.40,and 0.45 is realized at the single-domain state of the tetragonal and orthorhombic phases.In solid solutions with y=0.05 and x=0.05 and 0.20,as well as with y=0.075 and 0.10,and x=0.15,the formation of a planar interphase boundary being parallel to a zero-net-strain plane occurs at the elastic matching of the single-domain tetragonal and polydomain orthorhombic phases.In contrast to this,at y=0.05 and x=0.25,0.30,and 0.35,the complete stress relief is associated with a co-existence of the single-domain orthorhombic and polydomain tetragonal phases,however in some cases,the tetragonal phase aims at a monodomainization.
基金support of the Ministry of Science and Higher Education of the Russian Federation(State Task in the Field of Scientific Activity,Scientific Project No.0852-2020-0032/BAZ0110/20-3-07IF).
文摘The paper reports results on the complex study on ferroelectric ceramics that represent solid solutions containing components with a perovskite-type or columbite-type structure.Solid solutions of a three-component(1−x−y)NaNbO_(3)−xKNbO_(3)−yCdNb_(2)O_(6) system are manufactured at x=0.05-0.20 and y=0.10.Domain structures in ceramic grains are studied.The consistency between experimental and calculated results is examined for coexisting phases split into non-180°domains(mechanical twins)in the solid solution with x=0.15.A correlation between the internal structure(crystal,domain,granular,and defect)and fundamental electromechanical and polarization properties is stated for the studied three-component solid solutions.
