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Achievements 2003 - 2015
Last Update
24.08.2016

A new relaxor family Na1/2Bi1/2TiO3-SrTiO3-PbTiO3 with the largest known range of relaxor behavior up to now is synthe­sized and studied for the first time:

  • High value ECE at field-induced phase transitions in compositions with weak stability relaxor state,
  • Relation of local energy landscape and stability of ferroelectric state in appearance of relaxor state,
  • New approach (instead of Vogel-Fulcher law),
  • Evaluation of Burns temperature.

Phase diagram of Na1/2Bi1/2TiO3-BaTiO3 solid solutions above morphotropic phase boundary:

  • Three types of concentration range with different nature of phase transition have been found,
  • High tetragonality of lattice with increasing concentration of Na1/2Bi1/2TiO3 is found,
  • Contribution to interpretation of phase transitions in pure Na1/2Bi1/2TiO3.

Dielectric, elastic, thermal and magnetic properties, structure and microstructure of ferroelectric single-crystal and polycrystal solid solutions are studied in a wide range of the measuring field frequency and within a broad interval of the temperature.

Layers of different polar structure for use in integrated optical means can be created by thermal treatment of concen­trated light flow on the surface of lithium tantalate single crystals.

The Effects of 3d Admixtures on Properties of Ferroelectric PLZT8/65/35 Ceramics:

  • Admixtures may ameliorate as well as restrain relaxor characteristics,
  • Mn, Fe, Co, Ni, and Cu dopants are related to several competing factors affecting polarization: Jahn-Teller effect, change of the concentration and orientation of polar nano-regions, the Maxwell-Wagner polarization, change of the concentration of vacancies in A and/or O sub-lattices.