A process for the production of an alkaline earth metal, aluminum-containing spinel/clay composition comprises: (a) combining (1) an acidic, aluminum-containing composition in which the aluminum is present in a positively charged species, and (2) a basic, alkaline earth metal-containing composition to form a gel mixture; (b) mixing the gel with kaolin clay to form a co-gel; and (c) calcining the co-gel mixture to form the alkaline earth metal, aluminum-containing spinel composition in a clay mat...

A cathode is disclosed utilizing an emission material of barium oxide, calcium oxide and samarium oxide.

Dielectric layers containing an atomic layer deposited hafnium oxide and an electron beam evaporated lanthanide oxide and a method of fabricating such a dielectric layer produce a reliable dielectric layer having an equivalent oxide thickness thinner than attainable using SiO.sub.2. Forming a layer of hafnium oxide by atomic layer deposition and forming a layer of a lanthanide oxide by electron beam evaporation, where the layer of hafnium oxide is adjacent and in contact with the layer of lantha...

Cerium oxide powder having carbonate groups and made of crystalline primary particles containing cerium oxide and having carbonate groups on the surface and in a region close to the surface, and having a BET surface area of from 25 to 150 m.sup.2/g, a mean diameter of from 5 to 50 nm, a carbonate concentration in the region close to the surface decreasing inwardly from the surface, a carbon content due to carbonate groups on the surface of from 5 to 50% by area, a carbon content due to carbonate...

The bond between a hard wear resistant coating of Al.sub.2 O.sub.3 and a cemented carbide substrate is greatly improved by means of a more effective interlayer of TiO. The TiO layer is provided by means of a reduction process from other titanium oxides such as TiO.sub.2.

A method for forming porous silicon oxide film, comprising the following steps. A CVD chamber having inner walls and a wafer chuck/heater is provided. At least a portion of the CVD chamber inner walls is pre-coated with a layer of first PECVD silicon oxide film having a first thermal CVD oxide deposition rate thereupon. A semiconductor wafer is placed on the wafer chuck/heater within pre-coated CVD chamber. The semiconductor wafer including an upper second PECVD silicon oxide film having a secon...

To produce N.sub.2 O, ammonium nitrate is decomposed in an aqueous, chloride-containing solution in nitric acid while an ammonia atmosphere is maintained above the reaction mixture. The preferred temperature range of the solution is 110.degree.-125.degree. C. The atmosphere of ammonia is maintained by introducing at least part of the required ammonia into the gas volume of the reaction vessel. The decomposition of the ammonium nitrate and the formation of N.sub.2 O is enhanced by the presence of...

A process for effecting the economical removal of various impurities from roasted molybdenite concentrates by extracting the molybdenum trioxide content in an aqueous ammonium hydroxide solution and effecting further conversion and extraction of the molybdenum value in the insoluble solid residue, thereby producing a molybdenum trioxide product of greater than 99 percent purity and effecting a recovery of substantially all of the molybdenum values in the original crude material.

The production of pigmentary TiO.sub.2 of improved properties by treatment of TiO.sub.2 with combined oxides of silicon and aluminum, the oxides being used in a weight ratio of 5-6 and in a concentration such that the pigment will have at least 0.5 percent by weight of oxide coating.

Manganese-zinc ferrites are provided consisting essentially of manganese oxide, zinc oxide and iron oxide and small but effective amount of stannic oxide and lithium oxide ranging up to about 3.2 percent by weight of stannic acid and up to about 0.125 percent by weight of lithium oxide.