Abstract:
Es wird eine sinter- und/oder schmelzfähige keramische Masse, umfassend einen langzeitstabilen Verbund kristalliner Phasen von Apatit, Wollastonit, Titanit und optional Cristobalit vorgeschlagen, der durch eine Glasphase stabilisiert ist und ein Herstellungsverfahren dafür. Die keramische Masse ist durch Sintern eines Gemischs erhältlich, umfassend zumindest die Bestandteile SiO 2 , CaO, P 2 O 5 , MgO, CaF 2 und TiO 2 allein oder in Kombination mit zumindest einem Alkalioxid, wobei das Alkalioxid ausgewählt ist unter Na 2 O und K 2 O. Weitere Ansprüche betreffen Verwendungen des gesinterten Materials in Form von Formkörpern zum Verfestigen, Reinigen, Aufrauen oder Polieren von Oberflächen medizinischer Implantate oder als Endoprothese.
Abstract:
One embodiment of the present disclosure is directed to an insulator comprising a ceramic composition, wherein the ceramic composition comprises about 25-60% SiO 2 ; 15-35% R 2 O 3 , wherein the R 2 O 3 is 3-15% B 2 O 3 and 5-25% AI 2 O 3 ; 4- 25% MgO+0-7% Li 2 O, wherein the total of MgO+Li 2 O is between about 6-25%; 2-20% R 2 O, wherein the R 2 O is 0-15% Na 2 O, 0-15% K 2 O, 0-15% Rb 2 O; 0-15% Rb 2 O; 0-20% Cs 2 O; and 4-20% F; crystalline grains, wherein the crystalline grains are substantially oriented to extend in a first direction to provide improved insulating properties in a direction perpendicular to the first direction, wherein the first direction is circumferential and the direction perpendicular to the first direction is radial; and a first zone and a second zone, wherein the first zone is in compression and the second zone is in tension.
Abstract:
The present invention relates to glass ceramics, in particular to machinable glass ceramics based on mica (eg fluormica) and to a process for preparing such glass ceramics by melting and crystallising magnesium fluoro alumino-silicate glasses and to their uses such as in dental crowns and inlays or industrially where there is a requirement for good electrical insulation and/or low thermal conductivity coupled with excellent machinability.
Abstract:
The invention relates to a metallic implant, which has vitreous-crystalline bioactive material on the surface thereof. According to the invention, a metallic implant base body arranged on the surface of the particles has a bioactive, vitreous-crystalline material consisting of 15-45 wt. % CaO, 40-45 wt. % P>25 2
Abstract:
The invention makes it possible to produce glassceramic materials having high strength characteristics. The inventive ceramised glass contains the following ingredients expressed in mass % : 57.0-70.0 SiO2, 12.7-19.0 Li2O, 2.0-4.0 NaPO3, 1.7-2.5 K2O, 0.9-1.2 CaF2, 4.0-8.0 LiF, 0.1-1.0 CeO2, 0.1-9.0 TiO2, 0.1-4.0 CaO, 0.1-4.0 MnO/MnO2, 0.1-4.0 Al2O3. The inventive ceramised glass is manufactured from lithium silicate glass at a temperature from 1300 DEG C to 1350 DEG C. Samples are formed with the aid of a cold mould. An annealing process is carried out at a temperature ranging from 400 DEG C to 420 DEG C. A heat treatment process after the annealing is carried out in two steps. In the first step, the temperature is raised to the range between 480 DEG C and 520 DEG C, a soaking process being carried out during 2-3 hours. In the second step, the temperature is raised to 680-720 DEG C, the soaking process is carried out during 2-3 hours at said temperature. Afterwards, the samples are cooled to the room temperature.
Abstract translation:本发明使得可以生产具有高强度特性的玻璃陶瓷材料。 本发明的陶瓷玻璃含有以质量%表示的以下成分:57.0-70.0SiO 2,12.7-19.0 Li 2 O,2.0-4.0 NaPO 3,1.7-2.5 K 2 O,0.9-1.2 CaF 2,4.0-8.0 LiF,0.1-1.0 CeO 2, 9.0 TiO2,0.1-4.0 CaO,0.1-4.0 MnO / MnO2,0.1-4.0Al2O3。 本发明的陶瓷化玻璃由温度为1300℃至1350℃的硅酸锂玻璃制成。借助冷模形成样品。 在400℃〜420℃的温度下进行退火处理。退火后的热处理工序分两步进行。 在第一步中,将温度升至480℃至520℃的范围内,在2-3小时内进行均热处理。 在第二步中,将温度升至680-720℃,在所述温度下2-3小时内进行均热处理。 然后将样品冷却至室温。
Abstract:
The present invention relates to a transparent glass-ceramic material which includes a glass matrix and a crystalline phase of lanthanum fluoride crystals in the glass matrix, where the transparent glass-ceramic material contains no silica. The present invention further relates to a method of producing the transparent glass-ceramic material.
Abstract:
The glass crystalline material bears a granitoid semblance and in general consists of beta -wollastonite crystals, being in the shape of spherulites, at the following ratio in % by mass: SiO2 55.0-60.0, Al2O3 6.0-9.0, CaO 17.0-25.0, MgO 3.0-10.0, K2O 5.0-7.0, Na2O 1.0-2.0, F 1.0-2.5; The method for obtaining the material provides for moulding the glass from a melt, which melt contains SiO2, Al2O3, CaO, MgO, Na2O, K2O, F , its cooling down to the temperature which is 30-50 C lower than the temperature of the glass-transition, and performing the thermal treatment of the glass untill achieving its transformation into said glass crystalline material.