Glaverbel

Carmeuse Research and Technology

Bernard Somerhausen

Albert Servais

Jean-Pierre Meynckens

Christian Dauby

Alexandre Zivkovic

Nicolas Vekony

Elise Aubry

The present invention relates to calcium hydroxide particles having a total pore volume greater than 0.18 cm/g, said total pore volume being calculated with the BJH method for a range of pores having a diameter of between 20 and 1000 &#x212b;, said particles being characterized in that the BJH partial pore volume for the range of pores having a diameter of between 20 and 100 &#x212b; corresponds to more than 20% of said BJH total pore volume.

Small-pore calcium hydroxide particles and method for manufacturing same

Cutting refractory material

Production of a siliceous refractory mass

A method of repairing an oxide-based refractory body by projecting a powder mixture against a hot surface of the body and in the presence of oxygen to provide a refractory repair mass includes providing a powder mixture composed of particles of at least one refractory oxide; fuel particles which react in an exothermic manner with the oxygen to form a refractory oxide and which are particles composed of at least one element selected from the group consisting of magnesium, aluminum, silicon, and mixtures thereof; and particles of silicon carbide present in an amount which is effective to provide a reduced porosity of the refractory repair mass and which does not exceed 10% by weight based on the weight of the powder mixture; and projecting the powder mixture against a hot surface of the oxide-based refractory body and in the presence of oxygen. Preferably, the powder mixture contains at least 1%, most preferably from 1 to 5%, by weight of the particles of silicon carbide. Preferably, the particles of silicon carbide have a particle size of less than 200 .mu.m.

Method and powder mixture for repairing oxide based refractory bodies

A reflective article such as a mirror or an energy-screening transparent panel comprises a reflective metal coating deposited on a glass substrate. The metal coating comprises a reflective layer of silver and has been treated with a solution containing ions of at least one of the group consisting of: Cr (II); V (II or III); Ti (III or II); Fe (II); In (I or II); Cu (I); and Al (III). Such a treatment affords protection of the reflective coating against corrosion.

Reflective articles and methods of manufacturing same

A reflective article such as a mirror or an energy-screening transparent panel comprises a reflective metal coating deposited on a glass substrate. The metal coating comprises a reflective layer of silver and has been treated with a solution containing ions of at least one of the group consisting of: Cr(II); V(II or III); Ti(III or II); Fe(II); In(I or II); Cu(I); and Al(III). Such a treatment affords protection of the reflective coating against corrosion.

Reflective articles having improved corrosion resistance

A reflective article includes a glass substrate and a reflective metal coating deposited on the glass substrate including a reflective layer of silver and having a surface stratum which has a population of tin atoms which is augmented as compared with the population of tin atoms (if any) in an underlying subsurface stratum by at least one tin atom per hundred metal atoms thereby conferring on the reflective metal coating an enhanced resistance to corrosion. The reflective layer of silver is treated with an acidified aqueous solution of a stannous salt, which solution is free from opalescence, thereby to augment tin atom population in a surface stratum of the reflective metal coating.

Corrosion resistant reflective articles

A mirror comprises a transparent glass sheet having a reflective metal coating deposited on the glass and a protective coating applied to the reflective coating. The protective coating comprises a paint having a residual internal stress S.sub.R equal to or less than 1 MPa, measured by the Cantilever method (as defined) at a temperature above its glass transition temperature. One suitable paint used in coating the mirror has the following composition:

Mirror and method of manufacturing same

A decorative mirror, including a transparent sheet; and at least one reflective silver layer comprised of silver deposited on one face of the transparent sheet, wherein a first silver layer of said at least one reflective silver layer has randomly distributed therein areas containing reaction products including non-metallic silver formed by reacting at least a part of the silver of said first silver layer with a substance which reacts with silver to provide reaction products including non-metallic silver so that the visible light reflectance of the decorative mirror is modified or interrupted.

Decorative mirror

A decorative mirror having a reflective silver layer deposited on a transparent sheet. A substance which reacts with silver is applied to the silver layer to create randomly distributed areas containing reaction products including non-metallic silver where the visible light reflectance of the mirror is modified or interrupted. In order to manufacture the mirror, a transparent sheet is wetted with a silvering solution to form a reflective silver layer, and while the sheet is still wet with the silvering solution the sheet is contacted with randomly distributed droplets of a solution of a substance which reacts with silver, the two solutions being made up using different solvents. The substance which reacts with silver may be a tin compound in an alcoholic solution, the silvering being effected with an aqueous solution. The silver layer whose reflective properties have been modified may be overcoated with a second silver layer, and the whole protected with further layers, for example of copper and paint.

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Nivelles, Belgium

Bernard Somerhausen