Abstract: The present invention relates to a process for preparing a tubular article, comprising (a) providing a carrier tube, (b) providing a metal coating on the carrier tube by applying a liquid metal phase onto the carrier tube and solidifying the liquid metal phase, (c) applying a contact pressure to the metal coating by at least one densification tool, and moving the densification tool and the metal coating relative to each other.

Abstract: A sputtering target for the production of layers such as optical layers, the layers produced by the target, and a method for producing the target are described. In addition to Si or a combination of Si and Al, the sputtering target contains metal oxide(s), a combination of at least two metal oxides, or a combination containing at least one metal oxide in the form of an alloy or in the form of a mixture. The sputtering target has a metal oxide fraction generated by the Si and Al and the metal oxide(s) or the combination thereof. Preferably, the metal oxide in the sputtering target is a metal oxide selected from ZrO2, Ta2O5, Y2O3, HfO, CaO, MgO, Ce2O3, Al2O3, TiO2 and Nb2O5.

Abstract: The invention relates to a sputtering target containing a sputtering material containing a metal oxide. The sputtering material contains zirconium and titanium as metals and contains at least one mixed oxide phase.

Abstract: The present invention relates to a process for preparing a tubular article, comprising (a) providing a carrier tube, (b) providing a metal coating on the carrier tube by applying a liquid metal phase onto the carrier tube and solidifying the liquid metal phase, (c) applying a contact pressure to the metal coating by at least one densification tool, and moving the densification tool and the metal coating relative to each other.

Abstract: A sputtering target for the production of layers such as optical layers, the layers produced by the target, and a method for producing the target are described. In addition to Si or a combination of Si and Al, the sputtering target contains metal oxide(s), a combination of at least two metal oxides, or a combination containing at least one metal oxide in the form of an alloy or in the form of a mixture. The sputtering target has a metal oxide fraction generated by the Si and Al and the metal oxide(s) or the combination thereof. Preferably, the metal oxide in the sputtering target is a metal oxide selected from ZrO2, Ta2O5, Y2O3, HfO, CaO, MgO, Ce2O3, Al2O3, TiO2 and Nb2O5.

Abstract: The invention relates to a sputtering target containing a sputtering material containing a metal oxide. The sputtering material contains zirconium and titanium as metals and contains at least one mixed oxide phase.

Abstract: The disclosure provides a method of producing thermally sprayed Al2O3 coatings having a high content of corundum without any property-reducing additives. The coatings may be utilized particularly in the field of electrical insulation, as a dielectric, and as protection from wear. The thermally sprayed Al2O3 coatings have a porosity of no more than 19%, and a high content of ?-Al2O3 (content of corundum) of at least 72% by volume. The coatings have a specific electrical resistance of >1·1012 Ohms·cm, and a purity of >97%. The production of said coatings is carried out utilizing aqueous or alcoholic suspensions made from substantially pure ?-Al2O3, having a grain size of >100 nm by thermal spraying.

Abstract: The invention relates to thermally sprayed Al2O3 layers having a high content of corundum without any property-reducing additives, and to a method for the production of said layers. The invention may be utilized particularly in the field of electrical insulation, as a dielectric, and as protection from wear. According to the invention, the thermally sprayed Al2O3 layers are characterized in that they have a porosity of no more than 19%, and a high content of ?-Al2O3 (content of corundum) of at least 72% by volume. The layers have a specific electrical resistance of >1·1012 Ohms·cm, and a purity of >97%. The production according to the invention of said layers is carried out utilizing aqueous or alcoholic suspensions made from pure ?-Al2O3, having a grain size of >100 nm by means of a method from the group of thermal spraying.