Vapour pressure and standard enthalpy of sublimation of H3BO3

Pankajavalli, R.; Anthonysamy, S.; Ananthasivan, K.; Rao, P. R. Vasudeva

doi:10.1016/j.jnucmat.2006.12.025

Cited by 28 publications

(19 citation statements)

References 3 publications

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“…In the TGA profiles of the CNT-B sample before and after thermal treatment the largest weight loss occurred until 200 °C, which is the reason why this temperature was chosen as the final temperature during the thermal treatment. Dehydration of boric acid is expected to occur above 150 °C, leading to the formation of metaboric acid that can be further transformed to boron oxide (B2O3) [56,57]. The nature of the N, S, P, and B-functionalities incorporated with the mechanothermal treatments was investigated using the corresponding spectra obtained by XPS (Figure 4).…”

Section: Materials Characterizationmentioning

confidence: 99%

Mechanothermal Approach for N-, S-, P-, and B-Doping of Carbon Nanotubes: Methodology and Catalytic Performance in Wet Air Oxidation

Soares

Rocha

Órfão

et al. 2019

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The texture and the surface chemistry of carbon nanotubes (CNTs) were modified using a solvent-free methodology involving a ball-milling mechanical treatment and thermal treatment under nitrogen in the presence of adequate precursors (melamine, sodium thiosulfate, sodium dihydrogen phosphate, and boric acid) of different heteroatoms (N, S, P, and B, respectively). The incorporation of these heteroatoms promotes significant changes in the pristine textural and chemical properties. This easy post-doping method allows the introduction of large concentrations of heteroatoms. Their effect on the catalytic activity of the materials was evaluated in the oxidation of oxalic acid by catalytic wet air oxidation (CWAO), as an alternative to the noble metal and rare earth oxide catalysts traditionally used in this process. Improved catalytic activities were obtained using the N-, P-, and B-doped CNTs in oxalic acid oxidation, while the S-doped CNT sample underperformed in comparison to the pristine material.

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Section: Materials Characterizationmentioning

confidence: 99%

Mechanothermal Approach for N-, S-, P-, and B-Doping of Carbon Nanotubes: Methodology and Catalytic Performance in Wet Air Oxidation

Soares

Rocha

Órfão

et al. 2019

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“…Boron isotopes suggest a primarily atmospheric origin, with some trace mineral boron (Leslie et al, 2014). However, the Dry Valleys boron isotope values that suggest a trace mineral component could also form from Rayleigh distillation during the precipitation of atmospheric boron (Rose-Koga et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Polar desert chronologies through quantitative measurements of salt accumulation

Graly

Licht

Druschel

et al. 2018

Geology

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We measured salt concentration and speciation in the top horizons of moraine sediments from the Transantarctic Mountains (Antarctica) and compared the salt data to cosmogenicnuclide exposure ages on the same moraine. Because the salts are primarily of atmospheric origin, and their delivery to the sediment is constant over relevant time scales, a linear rate of accumulation is expected. When salts are measured in a consistent grain-size fraction and at a consistent position within the soil column, a linear correlation between salt concentration and exposure age is evident. This correlation is strongest for boron-containing salts (R 2 > 0.99), but is also strong (R 2 ≈ 0.9) for most other water-extracted salt species. The relative mobility of salts in the soil column does not correspond to species solubility (borate is highly soluble). Instead, the highly consistent behavior of boron within the soil column is best explained by the extremely low vapor pressure of boric acid at cold temperatures. The environment is suficiently dry that mobility of salt species within the soil column is controlled by vapor phase effects. In other cold desert settings, topsoil salts, speciically boron, may be employed as a proxy for relative sediment exposure age.

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“…Here, 100°C test temperature provided a good chemical decomposition to boric acid+base oil since it was reported that boric acid begins to decompose around 70 to 80°C. 61,62 However, more uniform tribofilm formation was observed on the 1% boric acid+base oillubricated substrate surface than the 3 and 5% boric acid+base oillubricated substrates (see blue colored areas in Figure 7B,D,F).…”

Section: Tribochemical Analysis Of the Surfacesmentioning

confidence: 96%

Tribological behavior of the low‐concentration boric acid and ZDDP lubricating oil mixtures

Özkan

Sulukan

2019

Surface & Interface Analysis

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Zinc dithiophosphate (ZDDP)‐free environmental friendly lubricating oil research studies have gained importance due to the governmental regulations over the last decade. In this study, low concentration boric acid‐base oil and ZDDP‐base oil mixtures were investigated with a ball on flat reciprocating tribometer to evaluate their tribological performances. The tribological performances of 1, 3, and 5% additive and base oil mixtures were evaluated at boundary lubrication condition in three main contexts including wear rates, surface tribochemistry, and friction. Results showed that there was no significant difference between boric acid and ZDDP friction coefficients. However, boric acid showed poor wear resistance when compared with ZDDP and it cannot be an alternative additive alone to ZDDPs.

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Vapour pressure and standard enthalpy of sublimation of H3BO3

Cited by 28 publications

References 3 publications

Mechanothermal Approach for N-, S-, P-, and B-Doping of Carbon Nanotubes: Methodology and Catalytic Performance in Wet Air Oxidation

Mechanothermal Approach for N-, S-, P-, and B-Doping of Carbon Nanotubes: Methodology and Catalytic Performance in Wet Air Oxidation

Polar desert chronologies through quantitative measurements of salt accumulation

Tribological behavior of the low‐concentration boric acid and ZDDP lubricating oil mixtures

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