In situ investigation of structural changes in perovskite-like oxides based on lanthanum ferrite in media with different partial pressures of oxygen

Винокуров, З. С.; Shmakov, A. N.; Sadykov, Vladіslav

doi:10.3103/s1062873813020408

Cited by 6 publications

(1 citation statement)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High-temperature diffraction experiments were carried out on a high-precision X-ray diffractometer mounted on the output channel of a VEPP-3 electron storage ring. , The diffractometer comprises a monochromator, a collimation system, and a position-sensitive detector. The Ge(111) single-reflection monochromator crystal made it possible to deflect a monochromatic beam by ∼30° in the vertical plane, providing the wavelength selection Δλ/λ ≈ (2/3) × 10 –4 .…”

Section: Methodsmentioning

confidence: 99%

Synthesis and Concentration of Organosols of Silver Nanoparticles Stabilized by AOT: Emulsion Versus Microemulsion

et al. 2018

View full text Add to dashboard Cite

In this work, we tried to combine the advantages of microemulsion and emulsion synthesis to obtain stable concentrated organosols of Ag nanoparticles, promising liquid-phase materials. Starting reagents were successively introduced into a micellar solution of sodium bis-(2-ethylhexyl)sulfosuccinate (AOT) in n-decane in the dynamic reverse emulsion mode. During the contact of the phases, Ag+ passes into micelles and Na+ passes into emulsion microdroplets through the cation exchange AOTNaOrg + AgNO3 Aq = AOTAgOrg + NaNO3 Aq. High concentrations of NaNO3 and hydrazine in the microdroplets favor an osmotic outflow of water from the micelles, which reduces their polar cavities to ∼2 nm. As a result, silver ions are contained in the micelles, and the reducing agent is present mostly in emulsion microdroplets. The reagents interact in the polar cavities of micelles to form ∼7 nm Ag nanoparticles. The produced nanoparticles are positively charged, which permitted their electrophoretic concentration to obtain liquid concentrates (up to 30% Ag) and a solid Ag–AOT composite (up to 75% Ag). Their treatment at 250 °C leads to the formation of conductive films (180 mOhm per square). The developed technique makes it possible to increase the productivity of the process by ∼30 times and opens up new avenues of practical application for the well-studied microemulsion synthesis.

show abstract

Section: Methodsmentioning

confidence: 99%