Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Henry Preiss"'
Publikováno v:
Journal of the European Ceramic Society. 19:187-194
Vanadium and chromium tartrate precursors prepared from aqueous solutions have been used as preceramic materials for carbothermal reactions with and without simultaneous nitridation. Their thermal behaviour has been investigated by TG/DTA, X-ray diff
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d0f982bd782654095390cf011d1e9199
https://doi.org/10.1016/s0955-2219(98)00191-5
https://doi.org/10.1016/s0955-2219(98)00191-5
Publikováno v:
Mikrochimica Acta. 125:343-347
Binary organic-inorganic gels have been prepared by mixing a carbonaceous hydrosol and a Nb2O5 or Ta2O5 sol derived by hydrolysis of the alkoxides. The gels are pyrolyzed under an inert atmosphere into precursors in which carbon and the metal oxides
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b9cb124ee03dd24d31d2aba7fab9b3c
https://doi.org/10.1007/bf01246209
https://doi.org/10.1007/bf01246209
Publikováno v:
Journal of the European Ceramic Society. 17:1423-1435
Binary hydrogels, in which a niobium or tantalum oxide gel and a pyrolysable organic compound are combined, were prepared as preceramic materials. Carbonaceous gel or saccharose is used as the organic gel constituent, and alkoxides or peroxo acids ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c327de489348465431f0d18b66948ad9
https://doi.org/10.1016/s0955-2219(97)00012-5
https://doi.org/10.1016/s0955-2219(97)00012-5
Publikováno v:
Carbon. 34:109-119
Binary organic—inorganic gels, in which a carbonaceous gel obtained from a coal tar pitch and a zirconia gel are combined, were prepared as precursors for carbothermal reduction with and without simultaneous nitridation to form Zr(C,O,N) solid solu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f02f35b307f64a604dd42f204219087c
https://doi.org/10.1016/0008-6223(95)00147-6
https://doi.org/10.1016/0008-6223(95)00147-6
Publikováno v:
Carbon. 33:1739-1746
Binary hybrid gels consisting of a carbonaceous hydrogel and a silica gel were prepared as preceramic materials. The pyrolytic conversion into carbon-containing glasses under inert conditions were followed by TG analysis, FTIR spectroscopy and nitrog
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75121a20b5570c92b8e5535ceefdf98b
https://doi.org/10.1016/0008-6223(95)00146-1
https://doi.org/10.1016/0008-6223(95)00146-1
Publikováno v:
Fuel. 73:243-249
Sulfonation of pitches and mesophase pitches renders them hydrophilic and gives rise to swelling, intercalation and ion-exchange properties of the sulfonation products because of their partly lamellar structure. The swelling of a sulfonated coal tar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b0da72d201b73dd192c459d839b8296
https://doi.org/10.1016/0016-2361(94)90120-1
https://doi.org/10.1016/0016-2361(94)90120-1
Publikováno v:
Carbon. 32:587-592
The effects of hydrothermal treatment (liquid water) at 300–470°C on a carbonaceous hydrogel containing acidic functional groups were studied. Unlike the pyrolysis of the dried hydrogel in the absence of water, the hydrothermal treatment converts
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19baf623ef57b92ebf55d3a16577093c
https://doi.org/10.1016/0008-6223(94)90076-0
https://doi.org/10.1016/0008-6223(94)90076-0
Publikováno v:
ChemInform. 29
Binary hydrogels, in which a niobium or tantalum oxide gel and a pyrolysable organic compound are combined, were prepared as preceramic materials. Carbonaceous gel or saccharose is used as the organic gel constituent, and alkoxides or peroxo acids ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e32562385e22e1e05503970dd1163174
https://doi.org/10.1002/chin.199808012
https://doi.org/10.1002/chin.199808012
Publikováno v:
ChemInform. 30
Vanadium and chromium tartrate precursors prepared from aqueous solutions have been used as preceramic materials for carbothermal reactions with and without simultaneous nitridation. Their thermal behaviour has been investigated by TG/DTA, X-ray diff
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e681a50ad448ab6788f1fea99a32db6
https://doi.org/10.1002/chin.199917294
https://doi.org/10.1002/chin.199917294
Autor:
Wolfgang Kant, Henry Preiss
Publikováno v:
Fuel. 71:635-640
Halogenated mesophase pitches which swell in contact with various solvents form porous solid carbon under pyrolysis. In the case of very active swelling solvents, the pyrolysed samples exhibit both swelling and pore adsorption. The overall solvent up
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::383897ae23c5950b1588aab011199805
https://doi.org/10.1016/0016-2361(92)90165-k
https://doi.org/10.1016/0016-2361(92)90165-k