Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Wolfgang Wisniewski"'
Autor:
Emmanuel Véron, Wolfgang Wisniewski, Jintai Fan, Michael J. Pitcher, Mathieu Allix, Vincent Sarou-Kanian, Franck Fayon
Publikováno v:
Crystal Growth & Design
Crystal Growth & Design, American Chemical Society, 2021, 21 (6), pp.3554-3561. ⟨10.1021/acs.cgd.1c00350⟩
Crystal Growth & Design, American Chemical Society, 2021, 21 (6), pp.3554-3561. ⟨10.1021/acs.cgd.1c00350⟩
International audience; Powder pellets of ca. 30 mg with the mol% composition 0.61Ga2O30.39La2O3 are levitated in a gas stream and melted using a pair of CO2 lasers. The levitating melt droplets crystallize to form La2Ga3O7.5 or LaGaO3 after the lase
Growing Oriented Layers of Bi4Ti3O12 in Bi2O3/TiO2/SiO2/Nd2O3/Al2O3 Glass-Ceramics by Melt Quenching
Publikováno v:
Scientific Reports, Vol 8, Iss 1, Pp 1-12 (2018)
A glass melt with the composition 24Bi2O3/40TiO2/10SiO2/10Nd2O3/16 Al2O3 was prepared and rapidly quenched between two copper blocks (sample A). A part of this glass was subsequently crystallised at 800 °C for 8 h (sample B). For the preparation of
Oriented surface nucleation and crystal growth in a 18BaO·22CaO·60SiO2mol% glass used for SOFC seals
Autor:
Stefan Reinsch, Christian Thieme, Sonja-M. Groß-Barsnick, Wolfgang Wisniewski, Ralf Müller, Christian Rüssel
Publikováno v:
CrystEngComm. 20:787-795
A glass of the composition 37BaO·16CaO·47SiO2 wt% produced on an industrial scale is crystallized at 970 °C for times ranging from 15 min to 2 h. The crystallization at the immediate surface as well as the crystal growth into the bulk are analyzed
Publikováno v:
Journal of Non-Crystalline Solids. 570:121019
Electrochemically induced nucleation (EiN) may be used to locally trigger the growth of Ba-fresnoite (Ba2TiSi2O8) in a glass melt leading to the growth of macroscopic dendrites. Applying a Czochralski-like procedure enables to grow such dendrites int
Autor:
Michael Kracker, Christian Bocker, Christian Rüssel, Thomas Höche, Christian Patzig, Wolfgang Wisniewski, Martina Stoica
Publikováno v:
Journal of Materials Science. 52:13390-13401
A glass in the system Na2O–SiO2–Al2O3–K2O–CaO–CaF2–ZnO was doped with Ce, Ag, Sn, Sb and Br. Homogeneous and transparent glass ceramics are obtained from this glass by the precipitation of CaF2 nanoparticles. An interface-controlled cryst
Publikováno v:
Journal of Alloys and Compounds. 699:832-840
A glass with the mol% composition 15 Y2O3/40 Al2O3/34 SiO2/5 AlF3/2.5 ZrO2/2.5 TiO2/1 CeF3 is melted and crystallized at 1000 °C, 1100 °C and 1400 °C for 10 h. Scanning electron microscopy (SEM) including electron backscatter diffraction (EBSD) is
Publikováno v:
Journal of Materials Science. 52:1955-1968
High-strength, colorless glass–ceramics in the MgO/Al2O3/SiO2 system with high concentrations of ZrO2 and a great potential for technical application, e.g., as high-performance hard disc substrates, are investigated. ZrO2 concentrations from 6 to 9
The interface of an industrially-produced block of an alumina-zirconia-silica (AZS) refractory material with the mold is extracted and prepared for analysis. The first 24 mm of crystal growth including the cast skin are analyzed using X-ray diffracti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92e5353c844a8a9411348df6528754d5
https://publica.fraunhofer.de/handle/publica/258158
https://publica.fraunhofer.de/handle/publica/258158
Autor:
Michael Kracker, Sabrina Seidel, Carlos Eduardo de Meo, Christian Rüssel, Wolfgang Wisniewski
Publikováno v:
CrystEngComm. 18:5492-5501
Glass sheets with the mol% composition 22.5MgO·22.5Al2O3·55SiO2 were coated with a thin ZrO2 layer on both sides via sol–gel dip coating. The samples were heated in a two-step process to 850 °C for 1 h and to 1000 °C for another 3 or 20 h. X-ra
Autor:
Sabrina Berndt, Antje Gawronski, Christian Patzig, Christian Rüssel, Thomas Höche, Wolfgang Wisniewski
Publikováno v:
RSC Advances. 5:15164-15171
Model experiments concerning the nucleation of MgO/Al2O3/SiO2 glass are reported. A glass with the composition 22.5MgO·22.5Al2O3·55SiO2 (in mol%) is brought into contact with ceramic samples of tetragonal ZrO2 at a temperature of 1500 °C. This lea