Abstract:
The present application relates to a protective and abradable coating composition for application on rolls and more particularly to conveyor rolls comprising an abradable coating for use in high temperature applications, to a process for making such rolls and to the use thereof. Corrosion by aluminium melt is reduced and build-up substances are removed by friction. The life time of the roll is then increased.
Abstract:
The present invention relates to refractory article used at high temperature having a silica, calcium silicate or mullite matrix with at least a surface having an open porosity filled at least partially with a sulfate, phosphate, carbonate salt or a mixture of thereof. The objective of the invention is to make the article resistant to the corrosion and build-up of non-ferrous metals and their alloys.
Abstract:
The present invention concerns a crucible (1) for the production of crystalline semiconductor ingots, said crucible comprising an inner volume defined by a floor (1a) which top surface comprises a planar portion defining a first horizontal plane (H) and peripheral side walls (1b) each comprising an inner surface comprising a planar portion substantially vertical, defining a substantially vertical plane (V), and normal to the first, horizontal plane (H), said side walls (1b) joining the floor (1a) at the perimeter of the latter by forming a radius of curvature, R1, of at least 1 mm, characterized in that, the intersecting line (hv) forming the intersection between the first, horizontal plane (H) and the substantially vertical planes (V) defined by the substantially vertical planar portions of each side wall (1b) is entirely located on the side walls (1b), on the floor (1a), or in the inner volume of the crucible.
Abstract:
The present invention concerns a crucible (1) for the production of crystalline semiconducting material ingots, such as silicon, said crucible comprising peripheral side walls (1b) and a floor (1a) at least a portion of said floor being coated with a top layer (2), characterized in that, said top layer (2) has a thickness, δ, of at least 500 μm and in that, at a deformation temperature below 1400 °C said top layer is plastically or viscously deformable.