Abstract: Quartz solid solution glass ceramics and precursors thereof are described, which are characterized by very good mechanical and optical properties and in particular can be used as restoration material in dentistry.

Abstract: Quartz solid solution glass ceramics and precursors thereof are described, which are characterized by very good mechanical and optical properties and in particular can be used as restoration material in dentistry.

Abstract: A glass composition, a device and a method for producing the device are disclosed. In an embodiment, the glass composition includes a tellurium oxide in a proportion of at least 65 mol. % and at most 90 mol. %, R1O in a proportion between 0 mol. % and 20 mol. %, wherein R1 is selected from Mg, Ca, Sr, Ba, Zn, Mn and combinations thereof and at least one M12O in a proportion between 5 mol. % and 25 mol. %, wherein M1 is selected from Li, Na, K and combinations thereof. The glass component further includes at least one R22O3 in a proportion between 1 mol. % and 3 mol. %, wherein R2 is selected from Al, Ga, In, Bi, Sc, Y, La, rare earths and combinations thereof, and M2O2 in a proportion between 0 mol. % and 2 mol. %, wherein M2 is selected from Ti, Zr, Hf and combinations thereof.

Abstract: Quartz solid solution glass ceramics and precursors thereof are described, which are characterized by very good mechanical and optical properties and in particular can be used as restoration material in dentistry.

Abstract: A glass composition, a device and a method for producing the device are disclosed. In an embodiment, the glass composition includes a tellurium oxide in a proportion of at least 65 mol. % and at most 90 mol. %, R1O in a proportion between 0 mol. % and 20 mol. %, wherein R1 is selected from Mg, Ca, Sr, Ba, Zn, Mn and combinations thereof and at least one M12O in a proportion between 5 mol. % and 25 mol. %, wherein M1 is selected from Li, Na, K and combinations thereof. The glass component further includes at least one R22O3 in a proportion between 1 mol. % and 3 mol. %, wherein R2 is selected from Al, Ga, In, Bi, Sc, Y, La, rare earths and combinations thereof, and M2O2 in a proportion between 0 mol. % and 2 mol. %, wherein M2 is selected from Ti, Zr, Hf and combinations thereof.

Abstract: An electric machine includes a laminated stator core having slots for receiving a stator winding, and a corona shield for insulating the stator winding. The corona shield includes a substrate; and a coating applied on the substrate, wherein the substrate and the coating are made entirely of inorganic material.

Abstract: A corona shield for an electrical machine includes a substrate with a coating or a fabric or non-woven fabric made of filaments which are coated, wherein the coating contains electrically conductive inorganic material.

Abstract: A corona shield for an electrical machine includes a non-woven fabric of fibers or a fabric of threads, wherein the fibers or threads contain electrically conductive inorganic material.

Abstract: A process for the production of nitrides for ceramic materials, in particr ALN, is described in which the element to be converted to the nitride is anodically oxidized. This oxidation is carried out in the presence of a nitrogen compound which can be reduced under the electrolysis conditions and of a substance which increases the conductivity. The electrolysis is followed, if necessary, by removal of volatile constituents and calcination of the product.