SU865881A1 - Composition for grinding and polishing fragile single crystal materials - Google Patents

Description

MONOCRYSTAL MATERIALS

Ti3o6peTeHHe relates to the machining of fragile monocrystalline materials and can be used for the treatment of carbide, haply-gadolinium garnet, sapphire, quartz. Formulations for grinding and polishing materials are known that contain abrasive powder and various fl-surfactants. The closest in technical essence and the achieved result is a composition for grinding and polishing brittle monocrystals containing diamond powder and, as a surfactant, an aqueous solution of a copolymer of acrylic acid with hexaallyl or tetraashtilpentaerythrite long time (about 4 hours); constant mixing; in addition, the composition is prepared immediately before processing, since it is polymerized during storage, due to a high viscosity The concentration of diamond powder is rather high (another 6 wt.%) diamond. The purpose of the invention is to increase the productivity of the equipment, improve the working conditions of the equipment, and reduce the surface roughness and depth of the broken layer of the product. materials, including abrasive powder, copolymer and water, as a copolymer contains a copolymer of lignosulfonate with methyl methacrylate and dopo -. It contains sodium nitrate, potassium chromate and a biological additive in the following ratio of components, wt.%: Lignosulfonic copolymer. Nata with methyl methacrylate0, 5-3.0 Sodium nitrate 0.2-0.7 3 Potassium chromic acid 0, -0.5 Biological additive 0.01-0.1 Abrasive powder 0.4-0.7 WaterOstal As a biological additive The composition contains hexachlorophene or phenol. The composition is prepared by dissolving the starting components in water followed by the addition of an abrasive powder. Variants of the composition are given in table. . In tab. 2 presents the comparative characteristics of the proposed and and

0.5 0.2

0.1 0.01

ok / 0 0,4

2

0.06 / 13v 0.063 / 13v 0.04 / 146 0.05 / 14a

The depth of the broken layer, µm 1.0-1.2 0.9-1.1 0.8-1.0 0.8-1.0

Time of preparation of the composition, h 4 0,2

Storage time

composition, months 0.03 2.5

Table 1

2 3 0.5 0.7

0.2 0.5

0.05 0.1

one

0.5 0.7

Ostal'Ostal- Else

Table 2

eight

0.2

0.2 5 known compositions tested on gallium-gadolinium garnet. The data table. 2, O.TOM testifies that, in comparison with the known composition, the proposed composition allows to increase the productivity of the treatment while achieving the same roughness class. The technology of preparation of the composition is simplified, which preserves its working properties for a substantial time. The consumption of diamond powders is reduced, and high quality machining is achieved.

Claims (2)

1. A composition for grinding and polishing brittle monocrystalline materials, including abrasive powder, copolymer and water, characterized in that, in order to increase the productivity of the process, improve equipment operating conditions, reduce the surface roughness and depth of the broken layer of the product, it contains as a copolymer A copolymer of lignosulfonate with methyl methacrylate and additionally contains sodium nitrate, potassium chromic acid and a biological additive with the following ratio of components, wt.% A copolymer of lignosulfonate with methyl methacrylate lat0.5-3 865881 Sodium nitrate 0,2-0,7 Potassium Chromic acid 0.1 ×), 5 Biological additive 0.01–0.1 Abrasive powder 0.4–0.7 Water Else 2. The composition according to claim 1, characterized by the fact that it contains hexachlorophen or phenol as a biological additive. V Sources of information taken into account in the examination 1.Babochkin OI, Brook V.A., Nikiforova-Denisova S.V. Mechanical processing of semiconductor materials. M., Higher School, 1973, p. 40 2. USSR author's certificate No. 5E80G4, class C 09 G 1/02, 1976 (protype).