niobium pentahydroxide

• CAS: 19132-56-0
• Catalog Number: ACM19132560
• Category: Main Products
• Molecular Weight: 177.94
• Molecular Formula: H5NbO5
• Synonyms: Niobium(V)pentahydroxide
• Appearance: Solid

Case Study

Niobium Powder Synthesized from Niobium Pentahydroxide Reduction for Capacitor Applications

Baba, Masahiko, et al. Journal of Physics and Chemistry of Solids 78 (2015): 101-109.

Producing high-performance capacitor-grade niobium powder requires precise morphological control and low oxygen content to achieve superior capacitance (CV) and reduced leakage currents. This study developed a calciothermic reduction process for synthesizing metallic niobium powder from niobium pentahydroxide [Nb(OH)₅·nH₂O] in molten CaCl₂. The approach leverages exothermic reaction kinetics and molten salt mediation to preserve fine particle morphology.
Approach:Niobium hydroxide mixed with CaO/Ca(OH)₂ was reduced in molten CaCl₂ via 2Nb(OH)₅·nH₂O + 5Ca → 2Nb + 5CaO + (2n+5)H₂O(g) (ΔH = -673 kJ/mol at 1173 K). Particle morphology and capacitor performance of sintered pellets were analyzed.
Key Findings: The powder retained sub-micrometer spherical particles with coral-like structures matching the precursor morphology. Sintered pellets showed higher CV than untreated powder (comparable to commercial tantalum capacitors) due to reduced shrinkage. Molten salt dissipated exothermic heat, preventing coarsening and yielding unique needle/branch/plate structures. Low oxygen content enabled higher voltage tolerance and reduced leakage currents.

Custom Q&A

What is the molecular formula of niobium pentahydroxide?

The molecular formula of niobium pentahydroxide is H5NbO5.

What are the synonyms for niobium pentahydroxide?

The synonyms for niobium pentahydroxide are niobium hydroxide and niobium(5+);pentahydroxide.

What is the molecular weight of niobium pentahydroxide?

The molecular weight of niobium pentahydroxide is 177.94 g/mol.

What are the component compounds of niobium pentahydroxide?

The component compounds of niobium pentahydroxide are niobium (CID 23936) and water (CID 962).

When was niobium pentahydroxide created?

Niobium pentahydroxide was created on October 25, 2006.

When was niobium pentahydroxide last modified?

Niobium pentahydroxide was last modified on October 21, 2023.

What is the IUPAC name of niobium pentahydroxide?

The IUPAC name of niobium pentahydroxide is niobium(5+);pentahydroxide.

What is the InChIKey of niobium pentahydroxide?

The InChIKey of niobium pentahydroxide is WPCMRGJTLPITMF-UHFFFAOYSA-I.

What is the canonical SMILES representation of niobium pentahydroxide?

The canonical SMILES representation of niobium pentahydroxide is [OH-].[OH-].[OH-].[OH-].[OH-].[Nb+5].

What is the CAS number of niobium pentahydroxide?

The CAS number of niobium pentahydroxide is 19132-56-0.