scholarly journals Influence of basicity and boron oxide content in slags of CaO-SiO2-B2O3-AlO3 system on solubility of periclase-carbon refractories

2020 ◽  
Vol 76 (4) ◽  
pp. 390-395
Author(s):  
A. A. Babenko ◽  
A. N. Smetannikov ◽  
A. G. Upolovnikova
Keyword(s):  
Boron Oxide ◽  
Oxide Content

Effect of Basicity and Boron Oxide in Slags of the AOD Process on the Equilibrium Interphase Distribution of Sulfur and Boron

2021 ◽  
Vol 410 ◽  
pp. 293-298
Author(s):  
Anatolij A. Babenko ◽  
Ruslan R. Shartdinov ◽  
Alena G. Upolovnikova
Keyword(s):  
Sulfur Content ◽  
Boron Oxide ◽  
Software Package ◽  
Oxide Phase ◽  
Oxide Content ◽  
Interphase Distribution ◽  
Metallurgical Slags ◽  
Argon Oxygen Decarburization ◽  
Fluxing Agent ◽  
Equilibrium Content

The use of fluorspar in modern metallurgical slags, incl. slags of the argon-oxygen decarburization (AOD) process, as a fluxing agent, is associated with many disadvantages. Those disadvantages can be solved by using boron oxide as an alternative, which also provides conditions for direct microalloying of steel with boron. The paper presents the results of thermodynamic modeling of the effect of basicity and boron oxide content in slags of the CaO–SiO2–B2O3–Cr2O3–Al2O3–MgO system on the equilibrium interphase distribution of sulfur and boron, and their equilibrium content in the metal. Modeling was carried out using the HSC 8.03 Chemistry software package (Outokumpu). Slag from the desulfurization period of the AOD-process was used as the oxide phase. As a result, it was shown that, in the range of basicities 2.0-2.5 and a content of 2-4% B2O3, it is possible to carry out desulfurization of the metal, providing a sulfur content of 0.001-0.007%, and simultaneous microalloying of steel with boron in an amount of up to 0.0103%.

Properties of Barium Stannate Titanate with Boron Oxide Addition

2009 ◽  
Vol 421-422 ◽  
pp. 239-242
Author(s):  
Nattaya Tawichai ◽  
Sukum Eitssayeam ◽  
Uraiwan Intatha ◽  
Kamonpan Pengpat ◽  
Gobwute Rujijanagul
Keyword(s):  
Boron Oxide ◽  
Room Temperature ◽  
Oxide Content ◽  
Sintering Aid ◽  
Oxide Addition ◽  
Barium Stannate ◽  
Multilayer Capacitor ◽  
Solid State Sintering ◽  
Titanate Ceramics ◽  
Sintering Method

In this study, barium stannate titanate ceramics with an addition of boron oxide were synthesized via a solid-state sintering method. The effect of sintering aid on electrical and mechanical properties of barium stannate titanate ceramics was investigated. It was found that, the ceramic with 2 wt% boron oxide showed the lowest porosity and the highest dielectric constant of ~ 13700 at room temperature. In addition, an increase in the boron oxide content was observed to enhance the hardness of the ceramics. These results may be helpful in the multilayer capacitor applications.

Acid-base properties of metals and glasses of Na2O.P2O5-xB2O3 system

1984 ◽  
Vol 49 (10) ◽  
pp. 2355-2362 ◽  
Author(s):  
Juraj Leško ◽  
Marie Dorušková ◽  
Jan Tržil
Keyword(s):  
Boron Oxide ◽  
A Priori ◽  
Optical Basicity ◽  
Galvanic Cell ◽  
Acid Base ◽  
Tetrahedral Configuration ◽  
Relative Basicity ◽  
Base Theory ◽  
Base Properties

Boron oxide in the Na2O.P2O5-x B2O3 system behaves as a Lux base. Its addition to Na2O.P2O5 brings about transformation of a Co(II) indicator from octahedral to tetrahedral configuration, increase in the optical basicity ΛPb(II), increase in the relative basicity of the melt as determined by means of a galvanic cell, and depolymerization reactions releasing PO43- ions. In the Na2O-B2O3 system free of P2O5, boron oxide behaves as a Lux acid. The amphoretic nature of B2O3 is explained in terms of Lux's acid-base theory extended in analogy with the protolysis theory. The theoretical optical basicity values do not indicate the amphoretic behaviour of B2O3 because in this approach boron oxide is a priori regarded as more acidic than Na2O.P2O5.

Enhanced electrochemical properties of Li[Li0.2Mn0.54Ni0.13Co0.13]O2 via lithium boron oxide glass surface treatment

2016 ◽  
Vol 292 ◽  
pp. 66-69 ◽  
Author(s):  
Maohui Bai ◽  
Zhixing Wang ◽  
Xinhai Li ◽  
Huajun Guo ◽  
Zhenjiang He ◽  
...  
Keyword(s):  
Surface Treatment ◽  
Electrochemical Properties ◽  
Boron Oxide ◽  
Glass Surface ◽  
Oxide Glass

scholarly journals Hydrothermally Assisted Fabrication of TiO2-Fe3O4 Composite Materials and Their Antibacterial Activity

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4715
Author(s):  
Adam Kubiak ◽  
Marta Kubacka ◽  
Elżbieta Gabała ◽  
Anna Dobrowolska ◽  
Karol Synoradzki ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Composite Materials ◽  
Bet Surface Area ◽  
Molar Ratio ◽  
Oxide Content ◽  
Gram Positive ◽  
Gram Negative ◽  
Transmission Electron ◽  
Xrd Patterns ◽  
Oxide Composites

The TiO2-Fe3O4 composite materials were fabricated via the hydrothermal-assisted technique. It was determined how the molar ratio of TiO2 to Fe3O4 influences the crystalline structure and morphology of the synthesized composite materials. The effect of the molar ratio of components on the antibacterial activity was also analyzed. On the basis of XRD patterns for the obtained titanium(IV) oxide-iron(II, III) oxide composites, the two separate crystalline forms—anatase and magnetite —were observed. Transmission electron microscopy revealed particles of cubic and tetragonal shape for TiO2 and spherical for Fe3O4. The results of low-temperature nitrogen sorption analysis indicated that an increase in the iron(II, III) oxide content leads to a decrease in the BET surface area. Moreover, the superparamagnetic properties of titanium(IV) oxide-iron(II, III) oxide composites should be noted. An important aim of the work was to determine the antibacterial activity of selected TiO2-Fe3O4 materials. For this purpose, two representative strains of bacteria, the Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus, were used. The titanium(IV) oxide-iron(II, III) oxide composites demonstrated a large zone of growth inhibition for both Gram-positive and Gram-negative bacteria. Moreover, it was found that the analyzed materials can be reused as antibacterial agents in three consecutive cycles with good results.

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