Zobrazeno 1 - 10
of 25
pro vyhledávání: '"E. F. Medvedev"'
Autor:
E. F. Medvedev, N. I. Min’ko
Publikováno v:
Glass and Ceramics. 74:7-12
Borosilicate glass-forming compositions R2O – B2O3 – SiO2 – RaOb (R — Li, Na, K; Ra — Zn, PbO) are investigated. A correlation-regression analysis of the criteria (the silicate modulus, the oxygen number, the structure cohesion factor, the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::02348ecbbfdf3c1c632d9c6442a4d29a
https://doi.org/10.1007/s10717-017-9915-2
https://doi.org/10.1007/s10717-017-9915-2
Publikováno v:
Glass Physics and Chemistry. 35:308-312
A new polymorphic modification of sodium tetrahydroxyborate NaB(OH)4 is synthesized and its crystal structure is determined. The compound crystallizes in symmetry space group P212121 with the unit cell parameters a = 5.323(5) A, b = 9.496(5) A, and c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15ffeb75ac545feba3b8000c3fff8dce
https://doi.org/10.1134/s1087659609030110
https://doi.org/10.1134/s1087659609030110
Autor:
E. F. Medvedev
Publikováno v:
Glass and Ceramics. 64:300-304
A borosilicate batch prepared in aqueous medium was investigated by IR spectroscopy. A method was developed for determining the individual sodium borosilicate bands in the presence of the most probable impurities — boric and silicic acids and sodiu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eb5d0c39ed395db363f1210ed70f4451
https://doi.org/10.1007/s10717-007-0075-7
https://doi.org/10.1007/s10717-007-0075-7
Autor:
E. F. Medvedev
Publikováno v:
Glass and Ceramics. 64:257-263
A calculation-graphic analysis of the IR spectra of sodium borate and silicate as components of a glass batch, obtained in aqueous medium, and probable contaminants — boric and silicic acids — was conducted. It was found that several bands called
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44114a5cf9db002deca2cca9b6e78311
https://doi.org/10.1007/s10717-007-0064-x
https://doi.org/10.1007/s10717-007-0064-x
Autor:
E. F. Medvedev
Publikováno v:
Glass Physics and Chemistry. 33:144-151
The processes occurring in the course of drying and gelation of an aqueous solution of a glass-forming material in the Li2O-Na2O-K2O-PbO-B2O3-SiO2-H8C6O7-H4N2CS system, as well as the bulk crystallization accompanying these processes, are investigate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6383963f5e119ad62609abc0a831e1e2
https://doi.org/10.1134/s1087659607020083
https://doi.org/10.1134/s1087659607020083
Autor:
E. F. Medvedev
Publikováno v:
Glass and Ceramics. 64:115-119
The results of IR spectroscopy of boric and silicic acids, which are the main components of the batch for fabricating microspheres, are presented. It is proved that the structure of boric and silicic acids contain water in molecular form (crystal-hyd
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ddb64f6835d6311e5db7866248ebba18
https://doi.org/10.1007/s10717-007-0030-7
https://doi.org/10.1007/s10717-007-0030-7
Autor:
A. Sh. Komarevskaya, E. F. Medvedev
Publikováno v:
Glass and Ceramics. 64:7-11
The distribution of components, phase composition, and structural features of sodium silicate synthesized in aqueous medium were investigated by IR spectroscopy. In prolonged storage in air, the substance partially cracked and its phase composition c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::56858c1bf7108611015cd0b49d584a9b
https://doi.org/10.1007/s10717-007-0002-y
https://doi.org/10.1007/s10717-007-0002-y
Autor:
E. F. Medvedev, A. Sh. Komarevskaya
Publikováno v:
Glass and Ceramics. 64:42-46
Analytically pure reagent “boric acid,” used in batches for preparing glass, was investigated by IR spectroscopy. It was found that the reagent consisted of three components — meta-and orthoboric acids and glassy boron oxide, water was present
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a6b1812b405afae2b8179c528267d71
https://doi.org/10.1007/s10717-007-0010-y
https://doi.org/10.1007/s10717-007-0010-y
Autor:
E. F. Medvedev
Publikováno v:
Glass Physics and Chemistry. 32:565-573
Glass microspheres have been used in laser physics as hydrogen microcontainers over a period of more than fifty years. However, developers of glass compositions are guided in their work only by practical experience and intuition in view of the lack o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dcf7092af2f6521971462badf745d54a
https://doi.org/10.1134/s1087659606050105
https://doi.org/10.1134/s1087659606050105
Autor:
S. O. Gladkov, E. F. Medvedev
Publikováno v:
Glass Physics and Chemistry. 32:346-352
The nucleation and growth of crystals in a gel of alkali lead borosilicate composition are investigated. It is revealed that dendrites are formed on the surface of the gel and that needle-shaped crystals grow in the gel bulk. An analysis of the distr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b78acec558aefca7b73d27a283a089b
https://doi.org/10.1134/s1087659606030151
https://doi.org/10.1134/s1087659606030151