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Asryan, N. A.; Kol’tsova, T. N.; Alikhanyan, A. S.; Нипан, Г. Д.

doi:10.1023/a:1020918616870

Cited by 17 publications

(5 citation statements)

References 10 publications

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“…600 °C of 71.7% gives rise to the formation of cervantite, Sb 2 O 4 (Figure , iv). This transition corresponds to a partial loss of antimony oxide by sublimation known to occur at high temperature for the oxides of this element . Both decomposition steps were confirmed with a mass spectrometer coupled to the TGA.…”

Section: Resultsmentioning

confidence: 64%

Antimony Oxide Hydroxide Ethanedisulfonate: a Cationic Layered Metal Oxide for Lewis Acid Applications

et al. 2008

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We have discovered a rare example of a cationically charged inorganic material. The layered structure is an example outside the extensively studied isostructural set of anionic clays/layered double hydroxides and our previously reported lead fluoride nitrate. For the present compound, the antimony oxide hydroxide layers are positively charged and are templated by anionic alkylenedisulfonate. The organic molecules are only bonded electrostatically to the layers with sulfonate oxygen to antimony distances beyond the covalent range. The material catalyzes a ketal formation reaction as a Lewis acid without the need for drying the solvent before the reaction or a nonaqueous medium such as toluene. The catalyst is heterogeneous and is completely recovered after the catalysis for reapplication.

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Section: Resultsmentioning

confidence: 64%

Antimony Oxide Hydroxide Ethanedisulfonate: a Cationic Layered Metal Oxide for Lewis Acid Applications

et al. 2008

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“…The evaporation behaviour of X 2 O 3 is well known; the gas phase contains primarily X 4 O 6 molecules with a well‐known cage structure and molecular symmetry T d . In the saturated vapour over phosphorus, arsenic and antimony trioxides, no other species besides P 4 O 6 , As 4 O 6 and Sb 4 O 6 , respectively,6–8 were detected. In the saturated vapour of bismuth oxide, small concentrations of other Bi/O species, including Bi 2 O 3 , were found 9.…”

Section: Introductionmentioning

confidence: 93%

Formation and Stability of Gaseous Ternary Oxides of Group 14–16 Elements and Related Oxides of Group 15 Elements: Mass Spectrometric and Quantum Chemical Study

Milke

Binnewies

2014

Eur J Inorg Chem

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The formation of four hitherto unknown lead tellurium oxides -PbTeO 3 , PbTe 2 O 5 , Pb 2 TeO 4 and Pb 2 Te 2 O 6 -was observed in the gas phase by means of a mass-spectrometric Knudsen-cell method. Other ternary oxides of group 14-16 elements were not observed in the gas phase. The enthalpies of formation for these oxides were obtained experimentally by means of a mass-spectrometric Knudsen-cell method and confirmed theoretically by using quantum chemical (QC) cal-

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“…Modification by adding higher valence elements or cations with smaller radii are able to preserve the metastable phases at room temperature. Various oxides, including TiO 2 [31], SnO 2 [32], ZrO 2 [33], HfO 2 [33], Ta 2 O 5 [30,[34][35][36], Nb 2 O 5 [26,36], MoO 3 [36], and WO 3 [31,36], have been investigated to prepare the metastable bismuth oxide phases. Among these oxides, zirconia is widely used in dentistry due to its high compatibility, mechanical strength, good abrasion resistance, and chemical stability.…”

Section: Introductionmentioning

confidence: 99%

Effects of Milling Time, Zirconia Addition, and Storage Environment on the Radiopacity Performance of Mechanically Milled Bi2O3/ZrO2 Composite Powders

et al. 2020

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Mineral trioxide aggregate (MTA) typically consists of Portland cement (75 wt.%), bismuth oxide (20 wt.%), and gypsum (5 wt.%) and is commonly used as endodontic cement. Bismuth oxide serving as the radiopacifying material reveals the canal filling effect after clinical treatment. In the present study, bismuth/zirconium oxide composite powder was prepared by high energy ball milling of (Bi2O3)100−x (ZrO2)x (x = 5, 10, 15, and 20 wt.%) powder mixture and used as the radiopacifiers within MTA. The crystalline phases of the as-milled powders were examined by the X-ray diffraction technique. The radiopacities of MTA-like cements prepared by using as-milled composite powders (at various milling stages or different amount of zirconia addition) were examined. In addition, the stability of the as-milled powders stored in an ambient environment, an electronic dry box, or a glove box was investigated. The experimental results show that the as-milled powder exhibited the starting powder phases of Bi2O3 and ZrO2 and the newly formed δ-Bi7.38Zr0.62O2.31 phase. The longer the milling time or the larger the amount of the zirconia addition, the higher the percentage of the δ-Bi7.38Zr0.62O2.31 phase in the composite powder. All the MTA-like cements prepared by the as-milled powder exhibited a radiopacity higher than 4 mmAl that is better than the 3 mmAl ISO standard requirement. The 30 min as-milled (Bi2O3)95(ZrO2)5 composite powder exhibited a radiopacity of 5.82 ± 0.33 mmAl and degraded significantly in the ambient environment. However, storing under an oxygen- and humidity-controlled glove box can prolong a high radiopacity performance. The radiopacity was 5.76 ± 0.08 mmAl after 28 days in a glove box that was statistically the same as the original composite powder.

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Cited by 17 publications

References 10 publications

Antimony Oxide Hydroxide Ethanedisulfonate: a Cationic Layered Metal Oxide for Lewis Acid Applications

Antimony Oxide Hydroxide Ethanedisulfonate: a Cationic Layered Metal Oxide for Lewis Acid Applications

Formation and Stability of Gaseous Ternary Oxides of Group 14–16 Elements and Related Oxides of Group 15 Elements: Mass Spectrometric and Quantum Chemical Study

Effects of Milling Time, Zirconia Addition, and Storage Environment on the Radiopacity Performance of Mechanically Milled Bi2O3/ZrO2 Composite Powders

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