摘要:
The invention relates to glass ceramics, which show high strength, high translucency, high chemical stability and which are still mechanically processible. The invention further refers to a method for producing a dental restoration comprising such glass or glass ceramic as well as the dental restoration itself.
摘要:
The invention refers to a method for producing a dental restoration comprising a lithium silicate glass or glass ceramic as well as a dental restoration inself. The invention further refers to a ingot with the same composition having a defined strength.
摘要:
The invention relates to glass ceramics based on the lithium metasilicate system (Li2OSiO2(Li2SiO3)), which are mechanically processible in a simple manner in an intermediate stage of the crystallization and, after complete crystallization, represent a high-strength, highly translucent and chemically stable glass ceramic.
摘要:
The invention refers to a method for producing a dental restoration comprising a lithium silicate glass or glass ceramic as well as a dental restoration inself. The invention further refers to a ingot with the same composition having a defined strength.
摘要:
The present invention relates to a damping device having a first control element with a first surface (O1) and a second control element with a second surface (O2), the two control elements being moveable relative to each other with their two surfaces, a spatial region (intermediate space Z) which is filled at least partially with a magnetorheological and/or electrorheological material (M) and is disposed between the first and the second surface, and a field producer (4) with which a magnetic and/or electrical field can be produced in at least a partial region of the material-filled part of the intermediate space, and also a housing (1) which has two chambers (K1, K2) and in which a piston unit (2) which is moveable relative to the housing and a closing unit (3) which is moveable relative to the piston unit are disposed, the piston unit and the closing unit forming a throughflow opening (D) connecting the two chambers, through which a fluid (F) can be displaced between the two chambers by means of a relative movement of piston unit and housing, the opening cross-section of the throughflow opening being able to be changed by means of a relative movement of piston unit and closing unit (3) and the closing unit and one of the control elements (O1) being coupled such that the relative movement of piston unit and closing unit can be controlled by means of the field strength in the intermediate space.
摘要:
In order to influence the human melatonin reservoir, the invention proposes the use of bodies, particularly glasses, having a transmittivity for light waves of a wavelength of about 460 nm of at least 92%, preferably of at least 95% or even 99%, as window glazings, for example, in the construction of houses, for sunrooms, or for indoor riding arenas. If said bodies are coated bodies, the invention proposes the use of a coating sol or gel, containing a hydrolyzable or partially or completely hydrolyzed silane and/or SiO2− and/or ZrO2− particle for producing the coating.