Saint-Gobain Vitrage

Saint-Gobain Ceramics & Plastics, Inc.

Saint-Gobain Abrasives, Inc.

Saint-Gobain Abrasifs

Patrick Garnier

Daniel Abriou

Jean-Jacques Gaudiot

Katarzyna Chuda

Gilles Querel

Michel Coquillon

Jérôme Latournerie

Shailendra S Parihar

George K Parker

Benoit Beghin

An abrasive product comprises an abrasive component and a bond component. In one embodiment, the bond component includes a binder and a filler component that includes a cryolite and at least one member selected from the group consisting of sodium oxalate (NaCO), sodium borate (NaBO.10HO), sodium polyphosphate, opal glass, a hexafluoroferrate, and a hexafluorozirconate. In another embodiment, the bond component includes a binder and a filler component that includes at least one member selected from the group consisting of a hexafluoroferrate, and a hexafluorozirconate. Alternatively, an abrasive product comprises an abrasive component and a filler component that includes at least one member selected from the group a hexafluoroferrate and a hexafluorozirconate. The abrasive component includes at least one of abrasive particles and agglomerates of abrasive particles.

Abrasive products including active fillers

A fuel cell includes a ceramic component and a sealing component. The sealing component includes a first glass-ceramic layer over the ceramic component and a second glass-ceramic layer over the first glass-ceramic layer, each of the first and the second glass-ceramic layers independently including between about 0.5% and about 50% glass phase content by volume. The first glass-ceramic layer includes a higher glass phase content than the second glass-ceramic layer, and between about 0.5% and about 10% glass stabilizer component by weight.

Multilayer glass-ceramic seals for fuel cells

Processes and apparatus for the production of hollow microspheres by thermal expansion of glass particles including the thermal treatment of extremely small glass particles whose dimensions are less than 50 micrometers and, preferably, less than 35 micrometers or even 20 micrometers, which include a fluidizing agent. This technique makes possible the production of extremely small glass microspheres under satisfactory yield conditions. Also, the hollow microsphere products produced by these processes and apparatus.

Apparatus for production of hollow glass microspheres

Production of microspheres having a very high silica content produced from a starting glass whose silica content is less than 80% by weight, with the remainder being essentially made up of boron oxide and one or more alkaline oxide(s). This starting glass is reduced into fine particles by grinding, optionally mixed with a fluidizing agent, and then passed through the flame of a burner at a temperature at least equal to 1500.degree. C. to form molten hollow microspheres which are suddenly cooled to form solid hollow microspheres. The microspheres produced thereby are recovered and contacted with a dealkalization agent to increase the silica content thereof to at least 92%.

Production of high silica glass microspheres

Production of glass microspheres

The invention relates to a process and apparatus for producing hollow glass microspheres. According to embodiments of the invention, particles of a soda-lime-silica glass containing slight amounts of sulfur compounds are suspended in a gaseous current and expanded in a burner, at a treatment temperature at least 100.degree. C. above the working temperature at which the specific type of glass constituting the treated particles is made from its raw materials, such as sand, lime, sodium carbonate, sodium sulfate, and others, depending on the particular type of glass. The process makes it possible to increase the yield of the transformation of the particles.

Process for producing glass microspheres

Growing community of inventors

Paris, France

Patrick Garnier