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Reactivity of T-Nb2O5 or H-Nb2O5 towards V2O5. Synthesis in the solid state and properties of V4Nb18O55

100%

Tabero P., Filipek E., Piz M.

vol. 7

issue 2

222-227

The IR spectrum of V4Nb18O55 has been compared with the IR spectra of selected niobates of known structures to show structural relations between these compounds. This comparison shows that V4Nb18O55 has crystal structure related to T-Nb2O5, W16Nb18O94 and Ba2NaNb5O15. On the other hand, reaction between V2O5 and H-Nb2O5 yields a solid solution of V2O5 in VNb9O25. It has been proposed two models of synthesized solid solution with formulas V1+xNb9-xO25 or V1+xNb9O25+5x/2.Independently of Nb2O5 polymorph, used for synthesis, the metastable compound VNbO5 cannot be synthesized in the solid state below 650°C [...]

Studies of a mixing process by using the various types of magnetic particles as active micro-stirrers

88%

Konopacki M., Frąckowiak A., Tabero P., Fijałkowski K., Rakoczy M.

Czasopismo Techniczne

The main purpose of this report is to present the effect of various types of magnetic particles on the mixing time. The magnetic particle may be treated as a miniaturized mixer and it may offer a unique, alternative approach to mixing. The obtained results suggest, that the mixing time under the rotating magnetic field (RMF) may be worked by using the relation between the mixing time number and the modified Reynolds number.

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1 Czasopismo Techniczne

1 Open Chemistry

1 2015

1 2009

2 Tabero P.

1 Fijałkowski K.

1 Filipek E.

1 Frąckowiak A.

1 Konopacki M.

1 Piz M.

1 Rakoczy M.

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Reactivity of T-Nb2O5 or H-Nb2O5 towards V2O5. Synthesis in the solid state and properties of V4Nb18O55

Studies of a mixing process by using the various types of magnetic particles as active micro-stirrers