By means of flux method a great number of oxide crystals were grown, such as MgO, ZnO, beta-Ga₂O₃, CaTiO₃, SrTiO₃, KNbO₃, KTaO₃, MgWO₄, ZnWO₄, Ba(Bi_1-xPb_x)O₃, LiNbO₃.

So, small but perfect magnesium oxide MgO crystals were grown using fluxed melts in the systems MgO - P₂O₅ - WO₃ and Na₂O - MgO - P₂O₅ - WO₃ with the spontaneous formation of crystallization centers or on a seed under fixed temperature gradient. Typical sizes of the crystals were of about 3 mm with the growth velocity near to 1 mm/day. Piezoelectric and semiconducting zinkite crystals ZnO in the form of platelets of 5-15 mm were grown from the melts of systems Zn0 - ZnF₂ - Na₂O - WO₃ and ZnO - MoO₃. Single crystals of beta- Ga₂O₃ up to 2-4 mm could be obtained from fluxed melts in system Na₂0 - Ga₂O₃ - WO₃.

Temperature dependencies of the reciprocal dielectric permeability in paraelectric phase of KNbO3 crystals doped with Al (1), Ti (2), undoped (3), La (4), Ce (5), and La+Al (6).

Perfect perovskite-family ferroelectric single crystals of KNbO₃ and KTaO₃, pure and doped with heterovalent elements, with sizes up to 15-30 mm were obtained from the melts of binary systems K₂O - Nb₂O₅(Ta₂O₅). Their electrical conductivity and dielectric properties and some peculiarities of ferroelectric phase transitions were investigated.

The well known nonlinear-optical LiNbO₃ crystals can easily be grown by Czochralski method, but in the present work the growth from fluxes with B₂O₃, V₂O₅ or WO₃ at temperatures below their ferroelectric transition point was used in order to study their natural crystal form and domain structure under conditions where temperature gradients and external electric fields are absent. As a rule such the crystals had sizes 5-10 mm, were single-domain, and their faces coincided with the rhombohedral planes {1012}.

Crystals of one of the first oxide superconductor, perovskite-like Ba(Bi_1-xPb_x)O₃, were grown from fluxed melts BaO - PbO - Bi₂O₃ - KF.

1. Growth of single crystals of high-temperature oxides. V.K.Yanovskii. Zh. Vses. Khim. O-va im D.I.Mendeleeva, 1968, v.13, p.134.
2. Growth of MgO single crystals in MgO - P₂O₅ - WO₃ and MgO - Na₂O - P₂O₅ - WO₃ systems. D.O.Brodichko, V.K.Yanovskii, and V.A.Koptsik. Neorgan. Mater., 1968, v.12, p.2158.
3. Growth of beta-Ga₂O₃ and Al₂(WO₄)₃ crystals from sodium polytungstate flux. V.I.Voronkova, V.K.Yanovskii, and V.A.Koptsik. Vestnik Mosk. Univ., Fiz.,Astron., 1968, v.23, p.109.
4. Growth of optical-quality KNbO₃ crystals from a flux. M.A.Gaffar, V.A.Koptsik, and V.K.Yanovskii. Kristallografiya, 1976, v.21, p.626.
5. Crystallization of LiNbO₃ from solution in borate, vanadate and tungstate melts. V.I.Voronkova, N.F.Evlanova, V.K.Yanovskii. Kristallografiya, 1978, v.23, p.234.
6. Electrical conductivity and dielectric properties of the doped KNbO₃ crystals. V.K.Yanovskii. Fiz. Tverdogo tela, 1980, v.22, p.2201.
7. Thermodynamic description of ferroelectric phase transition in the KNbO₃ crystals. V.K.Yanovskii. Fiz. Tverdogo tela, 1980, v.22, p.3714.
8. Phase transitions and properties of doped KNbO₃ crystals. V.K.Yanovskii. Phys. stat. sol. (a) , 1984, v.81, p.399.
9. Flux growth and properties of oxide crystals. V.I.Voronkova, V.K.Yanovskii, I.V.Vodolazskaya, and E.S.Shubentsova. Growth of Crystals, v.19. Consultants Burea, N.Y.,1993, p.111.