Zirconia formation by reaction of zirconium sulfate in molten
alkali-metal nitrates or nitrites

Huda Al Raihani; Bernard Durand; F. Chassagneux; David H. Kerridge; Douglas lnman

doi:10.1039/JM9940401331

Zirconia formation by reaction of zirconium sulfate in molten alkali-metal nitrates or nitrites

Huda Al Raihani, Bernard Durand, F. Chassagneux, David H. Kerridge, Douglas lnman

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

Abstract

Thermogravimetry up to 500 °C reveals several multi-stage reactions between Zr(SO4)2 and molten alkali-metal nitrates which form poorly crystallised mixtures of tetragonal and monoclinic zirconia. The use of NaNO3 gives incomplete transformations. The addition of NaCl as well as the use of LiNO3-KN03, leads the reaction to completion; the increase of basicity by the addition of Na2CO3 also has the same effect, if it is assumed that Na2ZrO3 is formed together with ZrO2. Pure and finely divided tetragonal zirconia is produced by a single-stage reaction at a temperature lower than 300 °C, when the basicity of the medium is increased by replacing LiN03-KNO3 by NaNO2-KNO3.

Original language	English
Pages (from-to)	1331-1336
Journal	Journal of Materials Chemistry
Volume	4
Issue number	8
DOIs	https://doi.org/10.1039/JM9940401331
Publication status	Published - 31 Aug 1994

Bibliographical note

Note: This research was supported by Commission of European
Communities.

Keywords

Chemistry

Access to Document

10.1039/JM9940401331

https://doi.org/10.1039/JM9940401331

Cite this

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title = "Zirconia formation by reaction of zirconium sulfate in molten alkali-metal nitrates or nitrites",

abstract = "Thermogravimetry up to 500 °C reveals several multi-stage reactions between Zr(SO4)2 and molten alkali-metal nitrates which form poorly crystallised mixtures of tetragonal and monoclinic zirconia. The use of NaNO3 gives incomplete transformations. The addition of NaCl as well as the use of LiNO3-KN03, leads the reaction to completion; the increase of basicity by the addition of Na2CO3 also has the same effect, if it is assumed that Na2ZrO3 is formed together with ZrO2. Pure and finely divided tetragonal zirconia is produced by a single-stage reaction at a temperature lower than 300 °C, when the basicity of the medium is increased by replacing LiN03-KNO3 by NaNO2-KNO3.",

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author = "\{Al Raihani\}, Huda and Bernard Durand and F. Chassagneux and Kerridge, \{David H.\} and Douglas lnman",

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T1 - Zirconia formation by reaction of zirconium sulfate in molten alkali-metal nitrates or nitrites

AU - Al Raihani, Huda

AU - Durand, Bernard

AU - Chassagneux, F.

AU - Kerridge, David H.

AU - lnman, Douglas

N1 - Note: This research was supported by Commission of European Communities.

PY - 1994/8/31

Y1 - 1994/8/31

N2 - Thermogravimetry up to 500 °C reveals several multi-stage reactions between Zr(SO4)2 and molten alkali-metal nitrates which form poorly crystallised mixtures of tetragonal and monoclinic zirconia. The use of NaNO3 gives incomplete transformations. The addition of NaCl as well as the use of LiNO3-KN03, leads the reaction to completion; the increase of basicity by the addition of Na2CO3 also has the same effect, if it is assumed that Na2ZrO3 is formed together with ZrO2. Pure and finely divided tetragonal zirconia is produced by a single-stage reaction at a temperature lower than 300 °C, when the basicity of the medium is increased by replacing LiN03-KNO3 by NaNO2-KNO3.

AB - Thermogravimetry up to 500 °C reveals several multi-stage reactions between Zr(SO4)2 and molten alkali-metal nitrates which form poorly crystallised mixtures of tetragonal and monoclinic zirconia. The use of NaNO3 gives incomplete transformations. The addition of NaCl as well as the use of LiNO3-KN03, leads the reaction to completion; the increase of basicity by the addition of Na2CO3 also has the same effect, if it is assumed that Na2ZrO3 is formed together with ZrO2. Pure and finely divided tetragonal zirconia is produced by a single-stage reaction at a temperature lower than 300 °C, when the basicity of the medium is increased by replacing LiN03-KNO3 by NaNO2-KNO3.

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U2 - 10.1039/JM9940401331

DO - 10.1039/JM9940401331

M3 - Article

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