Zobrazeno 1 - 10
of 18
pro vyhledávání: '"I. Valéria P. Yoshida"'
Publikováno v:
Materials Research, Vol 4, Iss 1, Pp 13-17 (2001)
Si3N4/SiC nanocomposite powders were obtained from a preceramic polymeric network based on poly(methylsilane) as the in situ quasi-stoichiometric SiC source. These powders were constituted of nanosized SiC particles homogeneously distributed in the S
Externí odkaz:
https://doaj.org/article/605e9541b6724c2988b819c44424ae6f
Publikováno v:
Journal of Materials Science. 48:1911-1919
We have prepared two polysiloxane networks with different molecular structures and similar compositions as suitable precursors of silicon oxycarbide glasses (SiOC), in order to understand the influence of the molecular architecture of the polymeric n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e3095e8acde682642da725b82574120
https://doi.org/10.1007/s10853-012-6955-4
https://doi.org/10.1007/s10853-012-6955-4
Publikováno v:
Materials Chemistry and Physics. 112:1047-1054
Novel poly(borosiloxanes), with a B/Si molar ratio of 0.2, were synthesized by a dehydrogen coupling reaction of 1,3,5,7-tetramethyl-1,3,5,7-tetracyclotetrasiloxane (D4H) oligomer and boric acid, B(OH)3, and by hydrolysis/condensation reactions of vi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9a0cccb445b80f57450e97633492188
https://doi.org/10.1016/j.matchemphys.2008.07.041
https://doi.org/10.1016/j.matchemphys.2008.07.041
Publikováno v:
Journal of Non-Crystalline Solids. 353:2280-2288
In this work, polycyclic silazane/siloxane networks bearing Si O and Si N bonds were synthesized, via hydrosilylation reaction, from cyclotrisilazane, [CH 2 CH(CH 3 )SiNH] 3 , and cyclotetrasiloxane, [CH 3 (H)SiO] 4 , with different Si H:Si vinyl mol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f8b01cfea7495e3f7bb0d3903661159f
https://doi.org/10.1016/j.jnoncrysol.2007.03.004
https://doi.org/10.1016/j.jnoncrysol.2007.03.004
Publikováno v:
Journal of Non-Crystalline Solids. 352:3444-3450
In this paper, a preceramic precursor, prepared by condensation reaction from poly(vinyl alcohol) (PVA) and boric acid (B(OH)3) in a B–OH: PVA-OH molar ratio of 1:1, was synthesized, as a potential precursor of lower-temperature route for ceramic m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::55efbb15cd723a5ba29f8c7b4b772fae
https://doi.org/10.1016/j.jnoncrysol.2006.02.108
https://doi.org/10.1016/j.jnoncrysol.2006.02.108
Autor:
André Aparecido Guedes, M D Assis, Marco Antônio Schiavon, I. Valéria P. Yoshida, Maria C.A.F. Gotardo, Nadia Mamede José
Publikováno v:
Journal of Molecular Catalysis A: Chemical. 229:137-143
In this work, we investigated the catalytic activity of representatives of the three generations of ironporphyrins, namely [5,10,15,20-tetraphenylporphyrin]iron(III) chloride (Fe(TPP)Cl), [5,10,15,20-tetrakis(2,6-dichlorophenyl)porphyrin]iron(III) ch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5704562c472a3e2ec7b824b71dccf9dd
https://doi.org/10.1016/j.molcata.2004.11.014
https://doi.org/10.1016/j.molcata.2004.11.014
Publikováno v:
Journal of Non-Crystalline Solids. 304:76-83
Polysilazanes have been described as excellent polymeric precursors to amorphous silicon carbonitride (SiCN) glasses. In this work, the synthesis, thermal cross-linking and pyrolysis of a polycyclic silazane network precursor for a SiCN glass, were s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b4aaae1f61503c42d940a1bffd36c64
https://doi.org/10.1016/s0022-3093(02)01007-4
https://doi.org/10.1016/s0022-3093(02)01007-4
Publikováno v:
Journal of Applied Polymer Science. 83:2347-2354
Silicone masterbatch (SMB) is a pelletized formulation containing 50% of an ultrahigh molecular-weight polydimethylsiloxane dispersed in polyethylene. This SMB is designed to be used as an additive in polyethylene-compatible systems to impart benefit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d57aab60505efff25702359eef3abfb
https://doi.org/10.1002/app.10214
https://doi.org/10.1002/app.10214
Publikováno v:
Materials Research, Volume: 4, Issue: 1, Pages: 13-17, Published: JAN 2001
Materials Research, Vol 4, Iss 1, Pp 13-17 (2001)
Materials Research v.4 n.1 2001
Materials research (São Carlos. Online)
Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
Materials Research, Vol 4, Iss 1, Pp 13-17 (2001)
Materials Research v.4 n.1 2001
Materials research (São Carlos. Online)
Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
Si3N4/SiC nanocomposite powders were obtained from a preceramic polymeric network based on poly(methylsilane) as the in situ quasi-stoichiometric SiC source. These powders were constituted of nanosized SiC particles homogeneously distributed in the S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06c07f39cb2be773f0a2a08bf5708a96
https://doi.org/10.1590/s1516-14392001000100004
https://doi.org/10.1590/s1516-14392001000100004
Publikováno v:
Journal of Materials Science. 34:155-159
This paper describes the use of a bi-component mixture of poly(methylsilylene), PMS, and tetra-allylsilane, TAS, in variable composition, as a pyrolytic precursor to SiC. The ceramic products were characterized by elemental analysis, 29Si MAS NMR, ac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eb2aa4e01b89f09443d88dde1fd0cd57
https://doi.org/10.1023/a:1004406800944
https://doi.org/10.1023/a:1004406800944