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Study of the formation of perovskite type lanthanum ruthenates by heating their hydrous precursor

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Title: Study of the formation of perovskite type lanthanum ruthenates by heating their hydrous precursor
Authors: Labhsetwar, Nitin K.1 nitin_neeri@yahoo.com, Balek, V.2, Večerníková, E.2, Bezdička, P.2, Subrt, J.2, Mitsuhashi, T.3, Kagne, S.1, Rayalu, S.1, Haneda, H.3
Source: Journal of Colloid & Interface Science. Aug2006, Vol. 300 Issue 1, p232-236. 5p.
Subjects: Lanthanum, Analytical chemistry, Noble gases, Micromechanics
Abstract: Abstract: Emanation thermal analysis (ETA), differential thermal analysis (DTA), thermogravimetry (TG), evolved gas analysis with mass spectrometric detection (EGA-MS), and X-ray diffraction (XRD) were used to investigate the formation of perovskite type lanthanum ruthenates on heating their hydroxide precursor in argon from 20 to 1200 °C. The co-precipitated lanthanum–ruthenium mixed hydroxide containing a small amount of carbonates was used as a precursor. The mass loss corresponding to the release of water and CO2 from the precursor was determined by TG and EGA (MS), respectively. The ETA characterized the exposure of sample surface after release of water and CO2, as well as microstructure development corresponding to the crystallization and structure ordering of LaRuO3 and La3.5Ru4.0O13 perovskite phases. The obtained information on formation of phases and their transformation is useful for optimizing their synthesis protocols for achieving the desired physical properties, and to estimate the thermal stability of these materials to be used as catalysts. [Copyright &y& Elsevier]
Copyright of Journal of Colloid & Interface Science is the property of Academic Press Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 21360064
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Study of the formation of perovskite type lanthanum ruthenates by heating their hydrous precursor
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  Data: <searchLink fieldCode="AR" term="%22Labhsetwar%2C+Nitin+K%2E%22">Labhsetwar, Nitin K.</searchLink><relatesTo>1</relatesTo><i> nitin_neeri@yahoo.com</i><br /><searchLink fieldCode="AR" term="%22Balek%2C+V%2E%22">Balek, V.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Večerníková%2C+E%2E%22">Večerníková, E.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Bezdička%2C+P%2E%22">Bezdička, P.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Subrt%2C+J%2E%22">Subrt, J.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Mitsuhashi%2C+T%2E%22">Mitsuhashi, T.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Kagne%2C+S%2E%22">Kagne, S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Rayalu%2C+S%2E%22">Rayalu, S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Haneda%2C+H%2E%22">Haneda, H.</searchLink><relatesTo>3</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Colloid+%26+Interface+Science%22">Journal of Colloid & Interface Science</searchLink>. Aug2006, Vol. 300 Issue 1, p232-236. 5p.
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  Data: <searchLink fieldCode="DE" term="%22Lanthanum%22">Lanthanum</searchLink><br /><searchLink fieldCode="DE" term="%22Analytical+chemistry%22">Analytical chemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Noble+gases%22">Noble gases</searchLink><br /><searchLink fieldCode="DE" term="%22Micromechanics%22">Micromechanics</searchLink>
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  Data: Abstract: Emanation thermal analysis (ETA), differential thermal analysis (DTA), thermogravimetry (TG), evolved gas analysis with mass spectrometric detection (EGA-MS), and X-ray diffraction (XRD) were used to investigate the formation of perovskite type lanthanum ruthenates on heating their hydroxide precursor in argon from 20 to 1200 °C. The co-precipitated lanthanum–ruthenium mixed hydroxide containing a small amount of carbonates was used as a precursor. The mass loss corresponding to the release of water and CO2 from the precursor was determined by TG and EGA (MS), respectively. The ETA characterized the exposure of sample surface after release of water and CO2, as well as microstructure development corresponding to the crystallization and structure ordering of LaRuO3 and La3.5Ru4.0O13 perovskite phases. The obtained information on formation of phases and their transformation is useful for optimizing their synthesis protocols for achieving the desired physical properties, and to estimate the thermal stability of these materials to be used as catalysts. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Journal of Colloid & Interface Science is the property of Academic Press Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.jcis.2006.03.049
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      – SubjectFull: Noble gases
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              Text: Aug2006
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