Stability of chromium dioxide particles in aqueous media

I. Ali; S. Raghavan; M. Pritzker

doi:10.1007/BF01410583

Stability of chromium dioxide particles in aqueous media

I. Ali, S. Raghavan, M. Pritzker

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

An investigation was carried out to characterize the dissolution behavior of stabilized and unstabilized CrO₂ particles in water, used in magnetic recording. Special attention was paid to the measurement of Cr(VI) concentration in the contact solution and to the elucidation of the effects of the stabilizing treatment by x-ray photoelectron spectroscopy (XPS). The experimental results indicate that both stabilized and unstabilized CrO₂ particles predominantly release hexavalent chromium when in contact with water. The solubility of freshly stabilized CrO₂ is considerably smaller than that of unstabilized CrO₂, but the difference in solubility diminishes with aged particles. The XPS study indicated that stabilization of CrO₂ particles with a bisulfite solution results in the formation of Cr₂O₃ or a Cr₂O₃-like product on the particle. However, it appears that Cr(III) oxide coating does not uniformly form on all particles.

Original language	English (US)
Pages (from-to)	255-261
Number of pages	7
Journal	Colloid & Polymer Science
Volume	267
Issue number	3
DOIs	https://doi.org/10.1007/BF01410583
State	Published - Mar 1989

Keywords

Chromium dioxide
chromium (VI)problem
magnetic media
solubility
stabilized and unstabilized

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Polymers and Plastics
Colloid and Surface Chemistry
Materials Chemistry

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10.1007/BF01410583

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title = "Stability of chromium dioxide particles in aqueous media",

abstract = "An investigation was carried out to characterize the dissolution behavior of stabilized and unstabilized CrO2 particles in water, used in magnetic recording. Special attention was paid to the measurement of Cr(VI) concentration in the contact solution and to the elucidation of the effects of the stabilizing treatment by x-ray photoelectron spectroscopy (XPS). The experimental results indicate that both stabilized and unstabilized CrO2 particles predominantly release hexavalent chromium when in contact with water. The solubility of freshly stabilized CrO2 is considerably smaller than that of unstabilized CrO2, but the difference in solubility diminishes with aged particles. The XPS study indicated that stabilization of CrO2 particles with a bisulfite solution results in the formation of Cr2O3 or a Cr2O3-like product on the particle. However, it appears that Cr(III) oxide coating does not uniformly form on all particles.",

keywords = "Chromium dioxide, chromium (VI)problem, magnetic media, solubility, stabilized and unstabilized",

author = "I. Ali and S. Raghavan and M. Pritzker",

year = "1989",

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doi = "10.1007/BF01410583",

language = "English (US)",

volume = "267",

pages = "255--261",

journal = "Colloid and Polymer Science",

issn = "0303-402X",

publisher = "Springer Verlag",

number = "3",

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TY - JOUR

T1 - Stability of chromium dioxide particles in aqueous media

AU - Ali, I.

AU - Raghavan, S.

AU - Pritzker, M.

PY - 1989/3

Y1 - 1989/3

N2 - An investigation was carried out to characterize the dissolution behavior of stabilized and unstabilized CrO2 particles in water, used in magnetic recording. Special attention was paid to the measurement of Cr(VI) concentration in the contact solution and to the elucidation of the effects of the stabilizing treatment by x-ray photoelectron spectroscopy (XPS). The experimental results indicate that both stabilized and unstabilized CrO2 particles predominantly release hexavalent chromium when in contact with water. The solubility of freshly stabilized CrO2 is considerably smaller than that of unstabilized CrO2, but the difference in solubility diminishes with aged particles. The XPS study indicated that stabilization of CrO2 particles with a bisulfite solution results in the formation of Cr2O3 or a Cr2O3-like product on the particle. However, it appears that Cr(III) oxide coating does not uniformly form on all particles.

AB - An investigation was carried out to characterize the dissolution behavior of stabilized and unstabilized CrO2 particles in water, used in magnetic recording. Special attention was paid to the measurement of Cr(VI) concentration in the contact solution and to the elucidation of the effects of the stabilizing treatment by x-ray photoelectron spectroscopy (XPS). The experimental results indicate that both stabilized and unstabilized CrO2 particles predominantly release hexavalent chromium when in contact with water. The solubility of freshly stabilized CrO2 is considerably smaller than that of unstabilized CrO2, but the difference in solubility diminishes with aged particles. The XPS study indicated that stabilization of CrO2 particles with a bisulfite solution results in the formation of Cr2O3 or a Cr2O3-like product on the particle. However, it appears that Cr(III) oxide coating does not uniformly form on all particles.

KW - Chromium dioxide

KW - chromium (VI)problem

KW - magnetic media

KW - solubility

KW - stabilized and unstabilized

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DO - 10.1007/BF01410583

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EP - 261

JO - Colloid and Polymer Science

JF - Colloid and Polymer Science

IS - 3

ER -

Stability of chromium dioxide particles in aqueous media

Abstract

Keywords

ASJC Scopus subject areas

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