Abstract:
Materials that seamlessly transition from opaque to transparent or translucent, such as advance ceramics to glass structures, which can be directly and seamlessly bonded without the use of an intermediate adhesive or use of a frame are disclosed. That is, a ceramic to glass structure can be bonded directly and seamlessly and without any mechanical joints, connective tissue or adhesives such as caulking or epoxy. Such ceramic to glass materials can be prepared by sintering a ceramic with a glass to form the ceramic-glass structure in which the interface is visually abruptly or in which the material is a graded composition with the desired rate of growth from one material to the other.
Abstract:
Synthetic ceramic proppants are described. Proppants having a monodispersity of 3-sigma distribution or lower are also described, including methods to make these proppants and methods of using these proppants.
Abstract:
Metal ion conducting ceramic materials are disclosed having characteristics of high ion conductivity for certain alkali and monovalent metal ions at low temperatures, high selectivity for the metal ions, good current efficiency and stability in water and corrosive media under static and electrochemical conditions. The metal ion conducting ceramic materials are fabricated to be deficient in the metal ion. One general formulation of the metal ion conducting ceramic materials is Me 1+x+y-z M III y M IV 2-y Si x P 3-x O 12-z/2 , wherein Me is Na + , Li + , K + , Rb + , Cs + , Ag + , or mixtures thereof, 2.0 ≤ x ≤ 2.4, 0.0 ≤ y ≤ 1.0, and 0.05 ≤ z ≤ 0.9, where M III is Al 3+ , Ga 3+ , Cr 3+ , Sc 3+ , Fe 3+ , In 3+ , Yb 3+ , Y 3+ , or mixtures thereof and M IV is Ti 4+ , Zr 4+ , Hf 4+ , or mixtures thereof.
Abstract:
An additive to foundry sand molding and core aggregates is used to produce sand cores and molds. The additive produces a sand-based foundry molding and core aggregate which resists the formation of some of the defects commonly associated with the production of castings produced by silica sand-based molding and core aggregates. In particular, the additive improves the quality of castings poured at temperatures higher than those of the pouring temperatures of molten iron, such as in steel castings and in iron castings with hot spots.
Abstract:
The method of converting nepheline syenite particulate feedstock with a grain size profile to an ultra-fine grain finish product for subsequent commercial use, the ultra-fine grain final product has a maximum grain size of less than about 6 microns. The method comprising: providing a dry feedstock with a controlled maximum particle size greater than about 20 microns; grinding the feedstock in a dry state by passing the feedstock vertically downward through a continuous, high-speed stirred ball mill whereby the feedstock is ground into an intermediate powder having a drastically reduced grain size profile than the grain size profile of the feedstock; and passing the intermediate powder from the mill through an air classifier using a rapidly moving high speed air stream moving along a given path to convey the ultra-fine grain product along the path and from the classifier and to allow coarse particulate material including particles larger than the ultra-fine product to be separated and then expelled from the classifier.
Abstract:
The present invention relates to the production of biocompatible magnetic materials for cancer therapy by means of hyperthermia. These materials are constituted by a biocompatible vitreous matrix in which there is dispersed a magnetic crystalline phase. The magnetic materials of the invention may be obtained with three different methodologies: coprecipitation, melting, and sintering.
Abstract:
A honeycomb structural body (1), a method of manufacturing the structural body, and an exhaust emission control system having the honeycomb structural body, the honeycomb structural body (1) comprising an outer peripheral wall (7), partition walls (2) disposed on the inside of the outer peripheral wall, and a plurality of flow holes (3) partitioned by the partition walls (2), passed through in axial direction, and having a generally rectangular cross section to the axial direction, characterized in that reinforcement parts (72) are installed at parts of the outer peripheral wall (7) of the honeycomb structural body (1), the area of the reinforcement parts (72) in the cross section of the honeycomb structural body (1) involves at least an area of the reinforcement parts in the cross section between a point on the outer peripheral wall in the direction of 40°from the cross sectional center (9) of the structural body (1) relative to the longitudinal direction of the partition wall (2a) or (2b) and a point on the outer peripheral wall in the direction of 50° and comes within an area between a point on the outer peripheral wall in the direction of 30°to a point on the peripheral wall in the direction of 60°, and the averaged thickness of the reinforcement parts (72) in the direction of the cross sectional center (9) is 1 to 10 mm, whereby the honey comb structural body having an excellent mechanical strength and less pressure loss, the method of manufacturing the structural body, and the exhaust emission control system having the honeycomb structural body can be provided.
Abstract:
A ceramic material has a thermal expansion coefficient of 50 x 10 -7 / °C or less, an absolute value of the difference between the relative refractive indexes of silica glass and the ceramic material of 0.2 or less at a wavelength of 1550 nm, and a light attenuation coefficient of 0.3 dB/cm or more.
Abstract:
A ceramic honeycomb wall-flow filter is prepared by plugging channels in a ceramic honeycomb comprised of clay by a method comprising the following. First, a mixture comprised of a dispersing liquid and ceramic powder is formed. Second, the mixture is inserted into at least one channel of a green ceramic honeycomb that is comprised of a clay to form a plugged green ceramic honeycomb wherein the dispersing liquid essentially fails to swell the clay. Alternatively, the mixture is inserted into a calcined ceramic honeycomb to form a plugged calcined ceramic honeycomb. Finally, the plugged green or calcined ceramic honeycomb is heated to a temperature sufficient to sinter the plugged green ceramic honeycomb to form a porous sintered plugged ceramic honeycomb. The method is particularly useful for simultaneously making the plugs and discriminating layers in the channels. In particular the method is useful to make wall-flow filter having plugs on at least one end with same composition as the discriminating layer or plugs on each end having different compositions.