Chromium crystal chemistry mullite-spinel refractory ceramics

Davide Levy; Gilberto Artioli; Alessandro Gualtieri; Simona Quartieri; Massimiliano Valle

doi:10.1016/S0025-5408(99)00067-7

Chromium crystal chemistry mullite-spinel refractory ceramics

Davide Levy
, Gilberto Artioli
, Alessandro Gualtieri
, Simona Quartieri
, Massimiliano Valle

University of Modena and Reggio Emilia
University of Milan
I.C.R.A. S.p.A.

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

9 Scopus citations

Abstract

A small amount of chromium oxide was added to a mullite-spinel refractory mixture to improve its thermal and mechanical properties. Two different compositions of mullite-spinel refractory were studied to define the crystal structures hosting the chromium cations, and the chromium solubility in spinel (MgAl_2-xCr_xO₄) was determined. Powder X-ray diffraction (XRD), X-ray absorption near edge spectroscopy (XANES), and scanning electron microscopy (SEM) elemental distribution maps were used to determine the chromium crystal chemistry in the system. The observed maximum solubility of chromium in spinel was found at x = 1.2, but the presence of mullite in the mixture caused a strong decrease of this value. The chromium distribution among the crystal phases reflects the different reaction paths of the two samples: a stage involving spinel and melt drives all present chromium in the spinel, while a simultaneous crystallization of spinel-mullite distributes chromium cations between mullite, spinel, and secondary corundum.

Original language	English
Pages (from-to)	711-720
Number of pages	10
Journal	Materials Research Bulletin
Volume	34
Issue number	5
DOIs	https://doi.org/10.1016/S0025-5408(99)00067-7
State	Published - 15 Mar 1999
Externally published	Yes

Bibliographical note

Funding Information:
Financial support from Italian MURST and CNR is acknowledged. Synchrotron data collection benefited from European Community support under the European Synchrotron Radiation Facilities (ESRF). User’s Plan (experiment HC-502). SEM images were collected at the CIGS of the Università di Modena, with the kind help of P. Fabbri.

Funding

Financial support from Italian MURST and CNR is acknowledged. Synchrotron data collection benefited from European Community support under the European Synchrotron Radiation Facilities (ESRF). User’s Plan (experiment HC-502). SEM images were collected at the CIGS of the Università di Modena, with the kind help of P. Fabbri.

Funders
MURST
Consiglio Nazionale delle Ricerche

Access to Document

10.1016/S0025-5408(99)00067-7

Cite this

@article{2d1efba31bb64dad8eda2b0deac1937a,

title = "Chromium crystal chemistry mullite-spinel refractory ceramics",

abstract = "A small amount of chromium oxide was added to a mullite-spinel refractory mixture to improve its thermal and mechanical properties. Two different compositions of mullite-spinel refractory were studied to define the crystal structures hosting the chromium cations, and the chromium solubility in spinel (MgAl2-xCrxO4) was determined. Powder X-ray diffraction (XRD), X-ray absorption near edge spectroscopy (XANES), and scanning electron microscopy (SEM) elemental distribution maps were used to determine the chromium crystal chemistry in the system. The observed maximum solubility of chromium in spinel was found at x = 1.2, but the presence of mullite in the mixture caused a strong decrease of this value. The chromium distribution among the crystal phases reflects the different reaction paths of the two samples: a stage involving spinel and melt drives all present chromium in the spinel, while a simultaneous crystallization of spinel-mullite distributes chromium cations between mullite, spinel, and secondary corundum.",

author = "Davide Levy and Gilberto Artioli and Alessandro Gualtieri and Simona Quartieri and Massimiliano Valle",

note = "Funding Information: Financial support from Italian MURST and CNR is acknowledged. Synchrotron data collection benefited from European Community support under the European Synchrotron Radiation Facilities (ESRF). User{\textquoteright}s Plan (experiment HC-502). SEM images were collected at the CIGS of the Universit{\`a} di Modena, with the kind help of P. Fabbri.",

year = "1999",

month = mar,

day = "15",

doi = "10.1016/S0025-5408(99)00067-7",

language = "אנגלית",

volume = "34",

pages = "711--720",

journal = "Materials Research Bulletin",

issn = "0025-5408",

publisher = "Elsevier Ltd.",

number = "5",

}

TY - JOUR

T1 - Chromium crystal chemistry mullite-spinel refractory ceramics

AU - Levy, Davide

AU - Artioli, Gilberto

AU - Gualtieri, Alessandro

AU - Quartieri, Simona

AU - Valle, Massimiliano

N1 - Funding Information: Financial support from Italian MURST and CNR is acknowledged. Synchrotron data collection benefited from European Community support under the European Synchrotron Radiation Facilities (ESRF). User’s Plan (experiment HC-502). SEM images were collected at the CIGS of the Università di Modena, with the kind help of P. Fabbri.

PY - 1999/3/15

Y1 - 1999/3/15

N2 - A small amount of chromium oxide was added to a mullite-spinel refractory mixture to improve its thermal and mechanical properties. Two different compositions of mullite-spinel refractory were studied to define the crystal structures hosting the chromium cations, and the chromium solubility in spinel (MgAl2-xCrxO4) was determined. Powder X-ray diffraction (XRD), X-ray absorption near edge spectroscopy (XANES), and scanning electron microscopy (SEM) elemental distribution maps were used to determine the chromium crystal chemistry in the system. The observed maximum solubility of chromium in spinel was found at x = 1.2, but the presence of mullite in the mixture caused a strong decrease of this value. The chromium distribution among the crystal phases reflects the different reaction paths of the two samples: a stage involving spinel and melt drives all present chromium in the spinel, while a simultaneous crystallization of spinel-mullite distributes chromium cations between mullite, spinel, and secondary corundum.

AB - A small amount of chromium oxide was added to a mullite-spinel refractory mixture to improve its thermal and mechanical properties. Two different compositions of mullite-spinel refractory were studied to define the crystal structures hosting the chromium cations, and the chromium solubility in spinel (MgAl2-xCrxO4) was determined. Powder X-ray diffraction (XRD), X-ray absorption near edge spectroscopy (XANES), and scanning electron microscopy (SEM) elemental distribution maps were used to determine the chromium crystal chemistry in the system. The observed maximum solubility of chromium in spinel was found at x = 1.2, but the presence of mullite in the mixture caused a strong decrease of this value. The chromium distribution among the crystal phases reflects the different reaction paths of the two samples: a stage involving spinel and melt drives all present chromium in the spinel, while a simultaneous crystallization of spinel-mullite distributes chromium cations between mullite, spinel, and secondary corundum.

UR - https://www.scopus.com/pages/publications/0345201678

U2 - 10.1016/S0025-5408(99)00067-7

DO - 10.1016/S0025-5408(99)00067-7

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:0345201678

SN - 0025-5408

VL - 34

SP - 711

EP - 720

JO - Materials Research Bulletin

JF - Materials Research Bulletin

IS - 5

ER -

Chromium crystal chemistry mullite-spinel refractory ceramics

Abstract

Bibliographical note

Funding

Access to Document

Other files and links

Fingerprint

Cite this