Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Wolfgang Wisniewski"'
Publikováno v:
Progress in Materials Science. 98:68-107
The crystallization of fresnoite from glasses enables to produce a wide variety of materials including piezoelectric glass-ceramics due to the aligned growth of these crystals in the amorphous matrix. The crystal structure of fresnoite leads to inter
Publikováno v:
CrystEngComm. 20:3234-3245
Glasses of the mol composition 2SrO·TiO2·2SiO2 + xSiO2 (with x = 0.0, 0.2, 0.75 and 1.5 mol) were prepared. They were polished and then heat treated for 5 h or more at 830 and 970 °C during which Sr-fresnoite (Sr2TiSi2O8) solely crystallised in al
Publikováno v:
CrystEngComm. 20:5409-5421
Glasses of the mol composition 2BaO·TiO2·2GeO2 + xGeO2 (with x = 0.0, 0.2, 0.75 and 1.5 mol) were prepared, polished and crystallised at 730 and 970 °C for 5 h. All glasses showed the surface crystallisation of Ge-fresnoite (Ba2TiGe2O8) as well as
Autor:
Wolfgang Wisniewski, Christian Rüssel
Publikováno v:
Progress in Materials Science. 118:100758
Heating inorganic glasses above their respective glass transition temperature leads to surface crystallization in many cases. Analyzing the immediate surface of the resulting glass-ceramics using electron backscatter diffraction (EBSD) has shown that
Publikováno v:
CrystEngComm. 19:2775-2785
Four glasses in the Bi2O3/TiO2/SiO2 and Bi2O3/TiO2/SiO2/Nd2O3 systems are melted and poured into graphite moulds where they show spontaneous crystallization during cooling. The crystal phases α-Bi2Ti4O11, Bi4−xNdxTi3O12, Bi2Si1−yTiyO5, TiO2 and
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
Autor:
Wolfgang Wisniewski, Christian Rüssel
Publikováno v:
Scanning. 38:164-171
This article contains a critical review of the literature concerning the information depth of electron backscatter diffraction (EBSD) and a viewpoint on the topic is formulated. EBSD is applied to a crystal partially covered by a wedge of amorphous g
Publikováno v:
CrystEngComm. 17:2969-2973
A silicate-phosphate-glass was placed into a furnace preheated to 1200 °C in order to crystallize rod-shaped fluoroapatite crystals. The partially crystalline melt is extruded to align the crystal rods, leading to oriented glass-ceramics with anisot
Publikováno v:
Crystal Growth & Design. 12:5035-5041
Ceramic or glass-ceramic materials containing diopside attract a great deal of interest due to their potential use as bioactive materials. In this paper, the growth of diopside from the surface of a glass with the weight percent composition 54.96SiO2
Publikováno v:
Applied Surface Science. 258:8506-8513
A simple process for producing wear resistant gold nano-particle coatings on transparent substrates is proposed. Soda-lime-silica glasses were sputtered with gold and subsequently coated with SiO 2 using a combustion chemical vapor deposition techniq