UA112017U - RAW MATERIAL FOR EMERGENCY EMERGENCY - Google Patents

Abstract

The raw mix to produce artificial emeralds involves the battle of crystal glass and soda. Additionally, the mixture contains chromium oxide, copper oxide and borax.

Description

A useful model belongs to the production of artificial stones for the manufacture of jewelry by the casting method.

The raw material mixture for obtaining an artificial emerald has a decisive influence on the consumer properties of a jewelry product - transparency, color tone, brightness (see Precious stones, quality standards, OBO "SANSY", M. 2010. - p. 2). Indicators of color tone and brightness of emeralds are divided into five groups, and according to purity - into three groups (Table 1).

Natural and Colombian emeralds are considered the best and in demand on the market. They have a thick grassy tone and are valued ten times more expensive than light green stones.

The specified tone and color of Colombian natural emeralds can be characterized as "medium-dark green" (Table 1).

A well-known raw material mixture for obtaining artificial emerald, which includes, wt. h.: green container glass 56-62; lead glet 2-3; soda 11-13; storm 7-8; saltpeter 1-3; carbon dioxide chromium 1/3-2/3 (see patent KU Mo2366623, СОЗ3С6/02, publ. 2009. 09.10).

The disadvantage of this mixture is the use of container green glass in its composition, which does not have stable color tone and light characteristics. This is due to the use of ferrochromic slag in the charge for the production of container glass, in which the amount of chromium oxide (Cg2Oz) varies in the range of 2-12 95. In the charge for the production of green bottle glass, scrap brown glass is used in the amount of up to 5 95. This does not allow achieve and stabilize in the material of the finished jewelry product, from the above-mentioned mixture, a color tone corresponding to the indicator "medium-dark green" (Table 1).

The closest to the proposed composition of the raw material mixture for obtaining artificial emerald is the raw material mixture (see patent KO Mo2412122), which includes, wt. h.: battle of crystal glass 89.1-91.2; soda 8-10; carbon dioxide cobalt 0.05-0.1; carbon dioxide chromium 0.75-0.8.

The technical result of the use of the mixture is to achieve economic security in the melting and casting of artificial emerald.

This raw material mixture is selected as a prototype.

The prototype and the claimed utility model have the following common features: - crystal glass battle; - soda

The disadvantage of the raw material mixture according to the prototype is the impossibility of obtaining an artificial emerald, the color tone indicator of which corresponds to the indicator of group 2 (Table 1), the tone is medium-dark green.

Another disadvantage of the mixture is the high fusion temperature of the mixture - 950-1000 "C. The first disadvantage is that it reduces the surface quality of the finished jewelry after mechanical processing, and the second disadvantage is the low quality of the casting before its mechanical processing (underfills, joints).

The basis of the useful model is the task: to develop an improved composition of the raw material mixture for the production of artificial emerald, in which, by changing the components of the mixture and their ratios in the composition, to ensure an increase in the quality of the surface of the product and casting.

The claimed result is achieved by the joint use of chromium oxide (CgOz) and copper oxide (CO) to obtain a medium-dark green tone and borax to reduce the alloy temperature of the raw material mixture.

The task is solved by the composition of the raw material mixture for obtaining artificial emerald, which includes battle crystal glass, and soda, in that it additionally contains chromium oxide, copper oxide and borax with the following ratio of components, mass. ch.: battle crystal glass 84-88, soda 6-8; borax 5-6, chromium oxide 0.2-1.2; copper oxide 0.4-0.8.

The use of chromium oxide (Si2O") and copper oxide (Cy) as part of the raw material mixture for the production of artificial emerald allows you to obtain a medium-dark green color tone in the finished jewelry material (Table 1).

When used simultaneously as part of the raw material mixture, wt. h.; sodas 6-8; borax 5-6, copper oxide 0.4-0.8 lowers the melting temperature of crystal glass.

Thus, the use in the proposed composition of the raw material mixture, wt. parts of chromium oxide 0.6-1.2 and copper oxide 0.4-0.8 allows you to obtain a color tone indicator - medium-dark green in the finished jewelry material, due to the fact that chromium impurities in natural emeralds amount to 1-2 95.

Use in the proposed composition of the raw material mixture, wt. part of soda 6-8, borax 5-6 and copper oxide 0.4-0.6 reduces the temperature of the fusion of crystal glass in the crucible, because these components are liquid in multicomponent glass.

Thus, the essential features of the proposed composition of the raw material mixture are in a cause-and-effect relationship with the technical result, namely the improvement of the quality of the surface of the product and casting in comparison with the analogue and prototype.

The proposed composition of the raw material mixture can be used for the manufacture of jewelry: rings, necklaces, earrings, etc., decorated with artificial emeralds that imitate (after cutting) natural Colombian emeralds.

Example 1.

To obtain artificial emerald, the composition of the raw material mixture, which is given in table 2, was used. Warehouse 4 - prototype.

For the preparation of the charge, a battle of crystal glass was used, which is characterized by the following chemical composition, wt. because: 5iOg" - 61.5-63.0; B2gOz - 1.0; AIgOz - 0.5; Sas - 0.5-1.0; 7p0 - 1.0; KO - 14.5-16.5; MagO - 2; RBO - 1.0; 5 oz - 0.5.

The crystal glass is washed from contamination and crushed, followed by sieving through mesh 014. The components are dosed in the required quantities and mixed.

The resulting mixture is melted in a crucible at a temperature of 940-24-10 "C. The melt is poured into metal molds. The resulting castings are annealed, after which samples are made for the quality of the material obtained from the composition of the mixture given in Table 2. The quality of the material is assessed by the color indicator tone and image. The evaluation results are shown in Table 3.

Examples 2, C were carried out similarly to example 1, but with different ratios of the components of the raw mixture.

The data are given in tables 2, 3.

The low content of cobalt carbon dioxide in the raw material mixture for glass gives a light blue (light blue) color tone. This tone in combination with green contributes to the formation of a medium-light green tone (Table 3).

The material from the proposed raw material mixture is fused in a crucible at a temperature of 9405210 "C, which is 30-50 "C lower than in the prototype. There were no underfills or joints on the surface of the castings.

Table 1

The quality standards of the emerald material in terms of color tone, clarity and transparency. Dark, Medium- Medium- Medium- Light-

The indicators of the color are dark and light. tones and pictures green green green green green

Group 1 Group C Group 5

Group 2 Group 4

G1, G2, GZ

Transparent, with Transparent with With sections

Indicators of purity with barely a little cloudiness, visible cracks and |lost inclusions)| inclusions | gloss

Table 2

The composition of the raw material mixture for the production of artificial emerald

Battle crystal warehouse | 88 2 sh/| 86 | 84 | 892 boda 77777771 Y111716111171771117165 1.78

Burai//////777711111111Ї1117151117111157 1161

Chromium oxide

Okismidi 77777771 Y1117104117711107 17111108 | -

Carbon dioxide cobalt

Table C

Color tone evaluation results

The number of the glass of the roll 1 2 of 4 of the raw material mixture

Indicator - - - . and Medium-dark Medium-dark | Medium-dark | Medium-light color tone and y y y her. green green green green pictures

Claims (1)

USEFUL MODEL FORMULA A raw material mixture for obtaining an artificial emerald, which includes a mixture of crystal glass and soda, which is distinguished by the fact that it additionally contains chromium oxide, copper oxide and borax, with the following ratio of components, by weight. h.: battle crystal glass 84-88 soda 6-8 borax 5-6 chromium oxide 0.6-1.2 copper oxide 0.4-0.8.