In-situ non-ambient X-ray diffraction studies of indium tungstate

Baiz, Tamam I.; Heinrich, Christophe P.; Banek, Nathan A.; Vivekens, Boris L.; Lind, Cora

doi:10.1016/j.jssc.2012.01.019

Cited by 12 publications

(28 citation statements)

References 45 publications

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“…Thus far elastic constants and related properties such as bulk [55][56][57][58]. Our analysis of experimental a c versus volume filler fraction in terms of Turner's model ( Figure 6) and calculations based on the ultrasonic tests gave a bulk modulus of 13.6 ± 2.6 GPa and 13.…”

Section: Discussionmentioning

confidence: 79%

Al2Mo3O12/polyethylene composites with reduced coefficient of thermal expansion

et al. 2014

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Recently, polymer composites reinforced with low fractions of thermomiotic nanoceramics have triggered a lot of research. The efforts have been focused on achieving considerable reduction of the coefficient of thermal expansion (CTE) of polymeric materials without deterioration of other physical properties. In this context, polyethylene (PE) composites reinforced with different loads of Al 2 Mo 3 O 12 nanofillers (0.5-4 mass %) were fabricated by micro-compounding. To enhance the interfacial interaction between the two components, chemical functionalization of Al 2 Mo 3 O 12 was performed with vinyltrimethoxysilane (VTMS) prior to micro-compounding. Infrared spectroscopy and thermogravimetry demonstrated the successful grafting of VTMS on the Al 2 Mo 3 O 12 surface. The composites showed strongly decreased CTEs, up to 46 % reduction for loadings of 4 mass % compared with neat PE, suggesting intimate filler-matrix interactions. The variation of CTEs of the composites in terms of the filler fraction was successfully described by Turner's model allowing calculation of the bulk modulus of monoclinic Al 2 Mo 3 O 12 (13.6 ± 2.6 GPa), in agreement with the value obtained by an ultrasonic method. The thermal stability of the composites was improved, although the addition of functionalized fillers decreased the degree of crystallinity of the PE to a small extent. The Young's modulus and yield strength of the composites increased from 6.6 to 19.1 % and 4.0-6.0 %, respectively, supporting the existence of strong filler-matrix interactions, contributing to an efficient load transfer. Finite element analysis of thermal stresses Electronic supplementary material The online version of this article (

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Section: Discussionmentioning

confidence: 79%

Al2Mo3O12/polyethylene composites with reduced coefficient of thermal expansion

et al. 2014

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“…A análise por DRX in situ com temperatura variável da amostra S5 C900 [27], que é único valor publicado até a presente data para o CET intrínseco do In2W3O12 na sua fase ortorrômbica. Os valores de CET encontrados neste trabalho para cada direção cristalográfica também são menores do que os apresentados por aqueles autores: αa = -4,9 ⨯ 10 -6 , αb = +3,1 ⨯ 10 -6 e αc = -2,7 ⨯ 10 -6 K -1 (neste trabalho); contra αa = -3,1 ⨯ 10 -6 , αb = +11 ⨯ 10 -6 e αc = +1,6 ⨯ 10 -6 K -1 [27].…”

Section: Drx In Situ Com Temperatura Variávelunclassified

“…Os valores de CET encontrados neste trabalho para cada direção cristalográfica também são menores do que os apresentados por aqueles autores: αa = -4,9 ⨯ 10 -6 , αb = +3,1 ⨯ 10 -6 e αc = -2,7 ⨯ 10 -6 K -1 (neste trabalho); contra αa = -3,1 ⨯ 10 -6 , αb = +11 ⨯ 10 -6 e αc = +1,6 ⨯ 10 -6 K -1 [27]. e 300°C e decresce até 900°C (fase ortorrômbica).…”

Section: Drx In Situ Com Temperatura Variávelunclassified

“…A descontinuidade significa que a transformação é de primeira ordem. Todos os relatos encontrados na literatura quanto à temperatura de transformação de fase estão de acordo com a faixa estabelecida por essa análise [16,19,21,22,23,24,27,29].…”

Section: Drx In Situ Com Temperatura Variávelunclassified

“…Para a fase ortorrômbica, encontrou-se pela primeira vez um CET intrínseco negativo, de αl = -1,5 ⨯ 10 -6 K -1 . Apesar de diferir do único publicado até a presente data, que é positivo [27], o valor obtido na presente pesquisa se adequa de forma precisa às tendências apresentadas em outros trabalhos [20,33]  Determinar a homogeneidade e a dispersão de carga nos compósitos analisando-se por TGA diferentes seções do mesmo corpo de prova;…”

Section: Conclusõesunclassified

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Compósitos De Polietileno De Alta Densidade Reforçados Por Nanopartículas De In2w3o12

SCHINAZI¹

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Pressure-induced structural transformations in In_2-x Y_x (MoO₄ )₃ systems

Paraguassu

Filho

Marinković

et al. 2015

J. Raman Spectrosc.

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In this work, we report results of high‐pressure Raman experiments (P < 8 GPa) on In2‐xYxMo3O12 for x = 0.0 and 0.5. A crystalline to crystalline structural phase transition and pressure‐induced amorphization (PIA) have been identified. The structural phase transition takes place at 1.5 and 1.0 GPa for In2(MoO4)3 and In1.5Y0.5(MoO4)3, respectively, resulting in the change of structure from monoclinic P21/a to a more denser structure. The PIA started at 5 and 3.4 GPa for In2Mo3O12 and In1.5Y0.5Mo3O12, respectively. The amorphization process takes place in two stages in the case of In1.5Y0.5Mo3O12 phase, while for In2Mo3O12, it is not complete until the pressure is as high as 7 GPa. Our results also suggest that with increase of ionic size of the A3+ ions, the octahedral distortion increases and consequently larger local structural disorder is introduced in the A2(MoO4)3 system, where A is a trivalent ion (In, Y3+, Sc3+, Fe3+, etc.). Copyright © 2015 John Wiley & Sons, Ltd.

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In-situ non-ambient X-ray diffraction studies of indium tungstate

Cited by 12 publications

References 45 publications

Al2Mo3O12/polyethylene composites with reduced coefficient of thermal expansion

Al2Mo3O12/polyethylene composites with reduced coefficient of thermal expansion

Compósitos De Polietileno De Alta Densidade Reforçados Por Nanopartículas De In2w3o12

Pressure-induced structural transformations in In_2-x Y_x (MoO₄ )₃ systems

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In-situ non-ambient X-ray diffraction studies of indium tungstate

Cited by 12 publications

References 45 publications

Al2Mo3O12/polyethylene composites with reduced coefficient of thermal expansion

Al2Mo3O12/polyethylene composites with reduced coefficient of thermal expansion

Compósitos De Polietileno De Alta Densidade Reforçados Por Nanopartículas De In2w3o12

Pressure-induced structural transformations in In2-x Yx (MoO4 )3 systems

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Pressure-induced structural transformations in In_2-x Y_x (MoO₄ )₃ systems