Synthesis and Sintering of Bi2Ti4O11

Akimov, A. I.; Savchuk, G. K.

doi:10.1023/b:inma.0000034770.04111.12

Cited by 8 publications

(5 citation statements)

References 6 publications

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“…In particular, the Rietveld analysis has shown that while the sample fired at 8001C is composed of a pure BT phase, which is monoclinic Bi 2 Ti 4 O 11 , the other sample after firing at 7001C shows the presence of cubic Bi 2 Ti 2 O 7 together with rutile titania crystallites. The lattice parameters and unit-cell volumes of cubic (c-Bi 2 Ti 2 O 7 ) and monoclinic BT (m-Bi 2 Ti 4 O 11 ) obtained from this work and from the literature 29,30 are reported in Table I. The data that we have obtained appear in good agreement with those reported in the literature that have been, however, obtained using powders 29 and sintered solids.…”

Section: Resultssupporting

confidence: 86%

“…The lattice parameters and unit‐cell volumes of cubic ( c ‐Bi 2 Ti 2 O 7 ) and monoclinic BT ( m ‐Bi 2 Ti 4 O 11 ) obtained from this work and from the literature 29,30 are reported in Table I. The data that we have obtained appear in good agreement with those reported in the literature that have been, however, obtained using powders 29 and sintered solids 30 . We have also calculated the average dimension of the crystallites, which results 40 nm in the cubic Bi 2 Ti 2 O 7 treated at 700°C and 90 nm in the monoclinic Bi 2 Ti 4 O 11 after treatment at 800°C.…”

Section: Resultssupporting

confidence: 85%

“…The data that we have obtained appear in good agreement with those reported in the literature that have been, however, obtained using powders 29 and sintered solids. 30 We have also calculated the average dimension of the crystallites, which results 40 nm in the cubic Bi 2 Ti 2 O 7 treated at 7001C and 90 nm in the monoclinic Bi 2 Ti 4 O 11 after treatment at 8001C. We have to underline that we have not observed any diffraction peak that could be assigned to the formation of bismuth silicates due to the reaction at the film-silicon interface with the thermal grown silica.…”

Section: Resultsmentioning

confidence: 98%

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Sol–Gel Processing of Bi₂Ti₂O₇ and Bi₂Ti₄O₁₁ Films with Photocatalytic Activity

Kidchob¹,

Malfatti²,

Marongiu³

et al. 2010

Journal of the American Ceramic Society

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A new sol–gel synthesis based on chloride compounds as precursors has been used to prepare bismuth titanate (BT) films. The films have been deposited by dip‐coating and fired at different temperatures in air; they remain amorphous up to 500°C, and crystallize into the pyrochloric cubic phase Bi2Ti2O7 between 600° and 700°C while at higher temperatures of firing the stable Bi2Ti4O11 monoclinic phase is formed. The films have been characterized by X‐ray diffraction analysis at gracing incidence, X‐ray photoelectron spectroscopy, ellipsometric spectroscopy, UV–visible absorption, and atomic force microscopy. The photocatalytic properties of the films have been evaluated by exposing a methyl orange solution containing the BT films to UV light. The test has shown that the Bi2Ti2O7 films have a higher activity in comparison with reference anatase titania films.

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Section: Resultssupporting

confidence: 86%

Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 98%

See 1 more Smart Citation

Sol–Gel Processing of Bi₂Ti₂O₇ and Bi₂Ti₄O₁₁ Films with Photocatalytic Activity

Kidchob¹,

Malfatti²,

Marongiu³

et al. 2010

Journal of the American Ceramic Society

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“…Based on experimental findings, Akimov and Savchuk reported that the formation of Bi 2 Ti 4 O 11 begins at 900°C and continues by a diffusion mechanism, and is dependent on the heating rate. The authors estimated that 2.5°C/min is the optimal heating rate for the formation of Bi 2 Ti 4 O 11 .…”

Section: Resultsmentioning

confidence: 99%

Development of a Yellow Pigment Based on Bismuth and Molybdenum‐Doped TiO₂ for Coloring Polymers

Silva

Kubaski

Cava

et al. 2014

Int J Applied Ceramic Tech

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An inorganic yellow pigment based on TiO2 containing minor amounts of bismuth and molybdenum compounds was developed without rare earths or highly toxic elements. The material was produced starting from a composition of 99% (mol%) of rutile TiO2 and 1% of MoO3, which were previously mixed and calcined at 1200°C. The composition consisted of 99.8% of the above mixture and 0.2% of bismuth(III) nitrate basic hexahydrate. This powder mixture was homogenized and calcined in a tubular furnace at 1200°C, applying different heating rates: 1, 30, 40, and 60°C/min. The yellow color was attributed to the presence of α‐Bi2O3, γ*‐Bi2MoO6, and Bi2Ti2O7 phases. The powder particle size proved suitable for using the material as an inorganic pigment for polymers. The technological application of the pigment was tested in high‐density polyethylene.

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“…Though some works on electrical properties of different BTOs have been reported in the literature [7,8,12,13], as far as we know, no work was found on Bi 2 TiO 5 ceramic system. It is also learnt from the literature that the electrical properties of the material can be satisfactorily analyzed by plotting the obtained data in complex planes [14][15][16].…”

Section: Introductionmentioning

confidence: 99%