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Updated: Dec 25, 2025
08:13
Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area
Published on: February 19, 2018
12.3K
Phase Equilibrium Relations in the Binary System Barium Oxide-Niobium Pentoxide.
Summary
Researchers mapped the barium oxide-niobium pentoxide phase diagram, identifying five binary compounds. Key findings include melting points and congruency for these barium compounds, crucial for materials science applications.
Area of Science:
- Materials Science
- Solid State Chemistry
- Phase Equilibria
Background:
- Understanding binary oxide systems is fundamental for developing advanced materials.
- The barium oxide-niobium pentoxide system is of interest for its potential applications.
Purpose of the Study:
- To construct a significant portion of the phase equilibrium diagram for the BaO-Nb2O5 system.
- To identify and characterize binary compounds within this system.
Main Methods:
- Phase equilibrium diagram construction using fusion characteristics.
- X-ray diffraction analysis for compound identification and structural determination.
Main Results:
- Five binary compounds identified with BaO:Nb2O5 molar ratios of 5:2, 1:1, 6:7, 3:5, and 1:3.
- Congruent melting points determined for the 1:1 (1455°C) and 5:2 (1542°C) compounds.
- Incongruent melting points established for the 6:7 (1330°C), 3:5 (1290°C), and 1:3 (1315°C) compounds.
Conclusions:
- The study successfully delineated key regions of the BaO-Nb2O5 phase diagram.
- Characterization of multiple binary compounds provides essential data for materials design.
- Further investigation into the 6:1 compound is hindered by reactivity with platinum.
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