On light scattering in transformer oil

Shkalikov, A. V.; Yushkova, Elena A.; Gafiyatullin, L. G.; Osin, Yu. N.; Turanova, O. A.; Козлов, В. К.; Туранов, А. Н.

doi:10.1134/s0030400x11050158

Cited by 6 publications

(5 citation statements)

References 5 publications

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“…This had previously been repeatedly demonstrated by methods of 1 H and 13 C nuclear magnetic resonance, and ultraviolet spectroscopy [7,10,11].…”

mentioning

confidence: 81%

“…Molecules referred to the resin class, for example, naphthenic acids, are formed during TO degradation. Being surface-active substances, they cover/encapsulate the bundled supermolecular associates, thereby forming micelles sized from 50 to 100 nm [10]. These processes may occur with and without variation in the ratio of the amplitude intensities of the lines in the radiation spectra.…”

mentioning

confidence: 99%

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Luminescence of grade GK transformer oil

Козлов

Garifullin

Туранов

2013

Chem Technol Fuels Oils

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“…This had previously been repeatedly demonstrated by methods of 1 H and 13 C nuclear magnetic resonance, and ultraviolet spectroscopy [7,10,11].…”

mentioning

confidence: 81%

mentioning

confidence: 99%

Luminescence of grade GK transformer oil

Козлов

Garifullin

Туранов

2013

Chem Technol Fuels Oils

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“…Shkalikov et al [7] describe the size distribution of particles in TO that they have investigated: particles ranging in size from 2 to 20 nm are contained in all samples, particles ranging in size from 100 to 200 nm are also present in sample II, while in sample III, particles ranging in size from 75 to 100 nm are agglomerated into coarse structures with a size of up to 1,000 nm. It is precisely the size of the heterogeneities that is a key factor affecting nonlinear optical absorption in TO.…”

Section: A(t) Absolute Unitsmentioning

confidence: 98%

“…Investigations [4][5][6][7] have indicated that heterogeneous structures always exist in TO. A method of determining the percentage of solid particles in oil products with use of nuclear magnetic (NM) relaxation is described in the literature [8].…”

Section: G K -G R a D E T R A N S F O R M E R O I L I S I N V E S T Imentioning

confidence: 99%

“…Owing to the physical and chemical processes that take place under the action of temperature, electric fields, and circulation of oil, the composition of the heterogeneous structures is altered over the life of the TO. These processes are currently being monitored by an obsolete method [3], which, in our opinion, is unreliable due to insufficient accuracy.Investigations [4][5][6][7] have indicated that heterogeneous structures always exist in TO. A method of determining the percentage of solid particles in oil products with use of nuclear magnetic (NM) relaxation is described in the literature [8].…”

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confidence: 99%

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Investigation of transformer oil by nuclear magnetic relaxation and Z-scanning

Arkhipov

Gizatullin

Shkalikov

et al. 2013

Chem Technol Fuels Oils

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G K -g r a d e t r a n s f o r m e r o i l i s i n v e s t i g a t e d b y m e t h o d s o f n u c l e a r m a g n e t i c r e l a x a t i o nand Z-scanning. The size of the heterogeneous structures in the oil increases during its service. The solid-particle content in the liquid phase, however, remains essentially unchanged, and the excess particles precipitate. The feasibility of quantitative determination of the heterogeneous-structure/liquid ratio in oil samples investigated is discussed.Heterogeneous structures -colloidal, micelle-like, and solid particles -affect the properties of transformer oils (TO), and may substantially reduce the breakdown voltage, and alter the viscosity and other TO characteristics critical to power transformers, and, consequently the power systems on the whole [1, 2]. Owing to the physical and chemical processes that take place under the action of temperature, electric fields, and circulation of oil, the composition of the heterogeneous structures is altered over the life of the TO. These processes are currently being monitored by an obsolete method [3], which, in our opinion, is unreliable due to insufficient accuracy.Investigations [4][5][6][7] have indicated that heterogeneous structures always exist in TO. A method of determining the percentage of solid particles in oil products with use of nuclear magnetic (NM) relaxation is described in the literature [8]. We have been unable, however, to find information on the applicability of this method to TO. The Z-scanning method is sensitive to nonlinear optical absorption of delocalized electrons, occurring most frequently in the heterogeneous particles [9]. This study described results of TO investigation by NM-relaxation and Z-scanning methods.

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