Preparation method of polishing powder for polishing of emeralds

A technology for polishing powder and emerald, which is applied in the field of emerald polishing, can solve the problem that the wear resistance cannot meet the requirements of emerald polishing, and achieve the effects of good polishing effect, low production cost and narrow particle size distribution range.

Inactive Publication Date: 2016-07-13
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compounding of several oxides can overcome the above-mentioned deficiencies. Chinese patent application CN101362925B discloses a compound polishing powder for polishing optical elements and its preparation method and polishing process. There are 0.5 to 3 parts of dichromium trioxide and 1.0 Part of aluminum oxide, but the wear resistance of this composite polishing powder can not reach the polishing requirements of jade; Chinese patent CN103923569B discloses a kind of preparation method of jadeite polishing powder, which is characterized in that the mass percent Add 12%~26% cerium chloride, 20%~32% zirconium oxychloride dissolved in water, then add 15%~30% aluminum oxide, 8%~15% silicon nitride, 2%~ 6% chromium trioxide, 0.5%~3% dispersant,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of liquid A: In the reactor, separately add, deionized water: 52mL, sodium pyrophosphate: 2.0g, after stirring to dissolve, add nano boron nitride: 12g, chromium trioxide: 34g, stirring for 1h , Prepare A liquid;

[0025] (2) Preparation of B solution: In the reactor, separately add, deionized water: 60mL, water-soluble cerium salt: 36g, ferric chloride: 4g, stir and dissolve to prepare B solution;

[0026] (3) Preparation of the compound: In the reactor, add separately, A solution: 42mL, B solution: 42mL, stirring, ammonia water: 8mL, then add 30% hydrogen peroxide: 8mL, react for 7h, separate solid and liquid, wash until medium The solid is dried at 110°C, baked at 950°C for 4h, cooled, and pulverized by airflow to obtain a composite. The particle size of the composite is 1.0~5.0μm;

[0027] (4) Preparation of gemstone polishing powder: In the grinder, add separately, beryllium oxide: 5g, compound: 88g, talc: 7g, turn on the grinder, and grind at 500 rpm for...

Embodiment 2

[0029] (1) Preparation of liquid A: In the reactor, separately add, deionized water: 56mL, tannic acid: 1.0g, after stirring to dissolve, add nano boron nitride: 10g, chromium trioxide: 33g, stirring for 1h , Prepare A liquid;

[0030] (2) Preparation of B solution: In the reactor, separately add, deionized water: 56mL, water-soluble cerium salt: 38g, ferric chloride: 6g, stir and dissolve to prepare B solution;

[0031] (3) Preparation of the compound: In the reactor, add separately, A liquid: 38mL, B liquid: 40mL, stirring, ammonia water: 10mL, then add 30% hydrogen peroxide: 12mL, react for 6h, separate solid and liquid, and wash until medium The solid is dried at 110°C, baked at 950°C for 4h, cooled, and pulverized by airflow to obtain a composite. The particle size of the composite is 1.0~5.0μm;

[0032] (4) Preparation of gemstone polishing powder: separately add beryllium oxide: 2g, compound: 92g, and talc: 6g in the grinder, turn on the grinder, and grind at 500 rpm for 60 m...

Embodiment 3

[0034] (1) Preparation of liquid A: In the reactor, separately add, deionized water: 48mL, oleic acid: 1.0g, after stirring to dissolve, add nano boron nitride: 15g, chromium trioxide: 38g, stirring for 1h, Prepare A liquid;

[0035] (2) Preparation of B solution: In the reactor, separately add, deionized water: 58mL, water-soluble cerium salt: 37g, ferric chloride: 5g, stir and dissolve to prepare B solution;

[0036] (3) Preparation of the compound: In the reactor, add separately, A liquid: 46mL, B liquid: 38mL, stirring, ammonia water: 6mL, then add 30% hydrogen peroxide: 10mL, reaction for 8h, solid-liquid separation, water wash until medium The solid is dried at 110°C, calcined at 950°C for 4h, cooled, and pulverized by airflow to obtain a composite. The particle size of the composite is 1.0~5.0μm;

[0037] (4) Preparation of gem polishing powder: separately add beryllium oxide: 8g, compound: 87g, talc: 5g in the grinder, turn on the grinder, and grind for 100min at 500 rpm to ...

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Abstract

The invention discloses a preparation method of polishing powder for polishing of emeralds. The preparation method is characterized by comprising the following process steps: adding the following components in a reactor in mass percentage concentration: 2-8% of beryllium oxide, 86-92% of a compound and 5-10% of talcum powder, wherein the sum of the components is 100%; starting a grinder to grind the components at a revolving speed of 500 revolutions per minute for 60-100 minutes so as to obtain agate polishing powder, wherein the particle size of the polishing powder is 1.0-5.0 microns, and the compound contains boron nitride, chromium sesquioxide, cerium oxide and iron oxide. The preparation method is simple in process, easy for control of conditions, low in production cost and easy for industrial production. The polishing process is good in powder polishing effect and glossiness, free of scratches, high in flatness and low in powder dosage.

Description

Technical field [0001] The present invention relates to the technical field of preparation of polishing powder, in particular to a preparation process of polishing powder for emerald polishing and its use in emerald polishing. Background technique [0002] Greengem is a beryllium-aluminosilicate mineral. The chemical composition of emeralds is Be 3 Al 2 [Si 6 O 18 ], which contains 14.1% beryllium oxide (BeO), alumina (Al 2 O 3 ) 19%, silicon oxide (SiO 2 ) 66.9%. The crystal is a cyclic silicate mineral of hexagonal crystal system. The crystals are often hexagonal columns with vertical stripes on the cylinders. The aggregates are sometimes clusters or needles, sometimes forming pegmatites, mostly light green. When the composition is rich in cesium, it will be pink, called rose emerald ; When it contains chromium, it is bright emerald green and is called grandmother; when it contains ferrous iron, it is light blue and called aquamarine; when it contains trivalent iron, it is ye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09G1/02
CPCC09G1/02
Inventor 李慧芝陈亚明李志英
Owner UNIV OF JINAN
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