49 results about "Cubic zirconia" patented technology

A turbine blade tip and shroud clearance control coating system comprising an abrasive blade tip coating and an abradable shroud coating are provided. The abrasive layer may comprise abrasive particles of cubic zirconia, cubic hafnia or mixtures thereof, and the abradable layer may be a nanolaminate thermal barrier coating that is softer than the abrasive layer. The invention further provides an alternate coating system comprising an abradable blade tip coating and an abrasive shroud coating.

The process of preparing zirconia and yttria with Y-doped cubic zirconia powder includes the following steps: alkali fusing and sintering Y-doped cubic zirconia powder, water washing to eliminate sodium, acidifying and concentrating to obtain Zr crystal, oxychlorination to re-crystallize and purify, and high temperature calcining to obtain high purity jewel level zirconia; concentrating Y-containing mother liquid to crystallize zirconia, purifying high Y mother liquid, precipitating Y in oxalic acid solution, and high temperature calcining to obtain high purity jewel level yttria. The present invention has relatively low cost.

A zirconia structural body includes a substrate having one surface on which a first electrode, a zirconia layer, and a second electrode are successively laminated. The zirconia layer is a bonded body of mixture consisting of monoclinic zirconia crystal grains and cubic zirconia crystal grains.

A turbine blade tip and shroud clearance control coating system comprising a dense abrasive blade tip layer and an abradable shroud layer are provided. The dense abrasive coating may comprise cubic zirconia, hafnia or mixtures thereof and the abradable layer may be a nanolaminate thermal barrier coating that is softer than the dense abrasive layer.

A lens element has a curved surface mounted adjacent an LED for improving the light transmission efficiency and the dispersal pattern of radiation emitted by the LED.

The invention relates to substitutes of real gems for the purpose of calibrating of commercial diamond testers and for verification of their correct operation. Suggested apparatus consists of a set of objects, which are made of cheap materials like brass, stainless steel, and electrically conductive rubber, and which exhibit combination of thermal and electric conductivities typical for diamonds and their popular imitations like moissanites, cubic zirconia, and others.

Disclosed is a reactive working material for use in a process of producing hydrogen by splitting water based on a two-step thermochemical water-splitting cycle through the utilization of solar heat, industrial waste heat or the like, which comprises a ferrite fine powder and a cubic zirconia supporting the ferrite fine powder. This reactive working material makes it possible to prevent scaling off of the ferrite fine powder from the zirconia fine powder due to volumetric changes of the ferrite fine powder during repeated use, and suppress growth of FeO grains due to repetition of melting and solidification when used as a reactive working material for a cyclic reaction under a high temperature of 1400° C. or more.

The invention relates to high-hardness high-strength high-transparency microcrystalline glass and a preparation method and application thereof. The preparation method comprises the following steps: casting a mixture into glass, and carrying out crystallization treatment to obtain the microcrystalline glass, wherein the mixture mainly comprises Li2O, A2lO3, SiO2, CaO, SrO, ZnO, BaO, K2O, Na2O, ZrO2, Sb2O3 and NaCl; and the prepared microcrystalline glass is mainly composed of a glass matrix, spodumene crystals dispersed in the glass matrix and distributed in a dendritic manner, spinel crystalsdistributed in a granular manner and cubic zirconium oxide crystals distributed in a granular manner, and can be applied to preparation of high-strength wear-resistant transparent microcrystalline glass glaze and to preparation of mobile phone panels. The preparation method of the high-hardness high-strength high-transparency microcrystalline glass is simple and easy to implement, and has extremely high popularization value; and the prepared microcrystalline glass has the advantages of a low melting point, excellent forming processability and good application prospects.

The invention discloses a production method of electrically melt yttrium oxide stabilized zirconia granulation powder which is profitable, green and environmentally friendly. The method comprises the following steps: adding zircon sand and Y-doped cubic zirconia powder (or Y-Zr powder) in reducing agent for mixing and electric smelting or directly adding baddeleyite for mixing and electric smelting, cooling, performing coarse crushing and fine crushing, screening, performing coarse grinding and fine grinding, performing wet grinding to generate pulp, performing surface modification, performing spray granulation, mixing evenly and packaging. The method of the invention uses Y-Zr powder as raw material, the technical process is simple and easy, the method does not discharge waste water, waste gas and waste residue; the equipment investment is less, the product quality meets user requirements, the production process does not adopt secondary electric smelting and high-temperature heat treatment and add stabilizing agent; and under the same conditions, compared with the stabilized Zr and granulation powder thereof which are produced by the current and popular technology, the granulation powder quality is higher, the performance is better and the cost is reduced by 30-40%.