摘要:
A fine feldspathic earthenware including a body and a glaze layer covering surfaces of the body. The body has water absorption percentage of not lower than 3% and lower than 15% and includes an annular bottom formed on a bottom portion of the body. The glaze layer is absent on a surface of the annular bottom, and the surface of the annular bottom is covered with an annular vitrified layer which has substantially no water absorbing property. The vitrified layer is formed by coating the surface of the annular bottom with a composition having lower refractoriness than the body, and biscuit-firing the composition together with the body.
摘要:
This invention relates to a dense ceramics having ESD dissipative characteristics, tunable volume and surface resistivities in semi-insulative range (103-1011 Ohm-cm), substantially pore free, high flexural strength, light colors, for desired ESD dissipation characteristics, structural reliability, high vision recognition, low wear and particulate contamination to be used as ESD dissipating tools, fixtures, load bearing elements, work surfaces, containers in manufacturing and assembling electrostatically sensitive microelectronic, electromagnetic, electro-optic components, devices and systems.
摘要:
An orthodontic appliance that includes a polycrystalline translucent aluminum oxide ceramic material having an average grain size of no greater than 1.0 micron and a Contrast Ratio value of less than about 0.7.
摘要:
Residual bones, and ashes from the cremation process of deceased humans and animals are turned into solid objects containing glass, ceramics, clay based materials, or composites such as organic polymer matrix, metal matrix, or inorganic cementaceous matrix, or combination of thereof. In another embodiment, ash is mixed with at least a liquid phase such as paint or coating, which upon dying or heating the mixture becomes solid. The final solid product can be made into any shapes or forms that the matrix can be made into without the addition of the ash. The final form of the product thereof can range from abstractive non-functional to geometrical shapes or functional forms such as containers, vases, or in the form of jewelry stones. Or painting, drawing, coating, and glazing. The objects can be made to contain almost all ash, such as in the case of ceramics or partially loaded with ash as is the case for glass and composites. In one other embodiment, the cremation residue either in a solid form or powdery form can be encapsulated in glass, ceramics, and various composites to form a heterogeneous product. The finished products can be marked with identification formats such as bar codes which make them possible to be traced electronically in a data base environment.
摘要:
An orthodontic appliance that includes a polycrystalline translucent aluminum oxide ceramic material having an average grain size of no greater than 1.0 micron and a Contrast Ratio value of less than about 0.7.
摘要:
Plates of ceramic material are prepared starting from stone material, particularly feldspar, quartz, porphyry, granites, silica, syenites, nephelines, ceramic materials, clays, kaolins, bentonites, in granular and/or powder form, mixed with a small amount of ceramic binder to form a mixture. This mixture is distributed onto a plane delimited from a containing frame and then subjected to the simultaneous action of a vacuum and of a vibratory motion combined with a pressing action. After the moulding step, a drying step and then a firing step are carried out, the latter taking place at the standard temperatures for the manufacturing of ceramic products.The resulting plate has high mechanical properties, is highly resistant to atmospherical and chemical agents, and has a very valuable aesthetic appearance.
摘要:
Aluminum electrolysis cell having a refractory lining, said lining being produced by calcining red mud obtained as a byproduct of the Bayer process of producing alumina, grinding the calcined product to form particles of -4 Tyler mesh, mixing the ground product with a binder (e.g. colloidal silica, colloidal alumina, sodium silicate or sodium aluminate) and sufficient water to produce a formable mixture. The mixture is formed into a shaped product, fired and used, for example, as a monolithic lining, to form the internal surface of the aluminum electrolysis production cell.
摘要:
A process for producing a refractory material and to the material so-produced. The process comprises calcining red mud obtained as a by-product of the Bayer process of producing alumina, grinding the calcined product to form particles of -4 Tyler mesh, mixing the ground product with a binder (e.g. colloidal silica, colloidal alumina, sodium silicate or sodium aluminate) and sufficient water to produce a formable mixture. The mixture is then formed into a desired shape and fired, preferably after curing and drying. The resulting fired products have good resistance to high temperatures and to corrosive chemicals such as cryolite. Consequently, the products can be used as refractory linings for aluminium production cells, and in similar applications.