RU2798526C1 - Charge for producing glass-metal beads - Google Patents

Abstract

FIELD: electronics; biotechnology; jewelry.

SUBSTANCE: development of compositions for the production of glass-metal beads used in electronics, biotechnology, and jewelry. The charge for obtaining glass-metal beads includes copper powder and fine glass waste powder. Copper powder and fine glass waste powder are used at the following mass ratios, wt.%: copper powder - 25%, glass waste powder - 75%. Powders are moistened up to 5-7% and granulated up to 1-3 mm.

EFFECT: improving the quality of the finished product.

1 cl, 1 tbl, 1 ex

Description

The invention relates to the development of compositions for the production of glass-metal microspheres and can be used in engineering, electronics, biotechnology, and also in jewelry.

Known composition of glass microballoons, described in the article [Krokhin V.P., Bessmertny V.S., Beam O.V., Nikiforov V.M. Synthesis of yttrium aluminum glasses and minerals // Glass and ceramics. 1997. No. 9. S. 6-7.].

The disadvantage of the composition is the low quality of the finished product.

The closest technical solution adopted for the prototype is the composition of the charge for obtaining glass-metal microballoons, described in the patent [Patent RU 2542066 The composition of the charge for obtaining composite glass-metal microballoons. Published 20.02.2015. Bull. No. 5], the composition of the mixture includes a metal wire, ground glass and binder.

The disadvantage of this composition is the low quality of the finished product.

The invention is directed to the development of the composition of the charge, providing the production of glass-metal microspheres of high quality, with a low percentage of rejects, without the use of binders in the charge.

The technical result of the proposed invention is to improve the quality of the finished product.

This is achieved by the fact that the charge for obtaining glass-metal microspheres includes copper powder and fine cullet powder, differs in that copper powder and fine cullet powder are used at the following mass ratios, wt.%:

copper powder -25%

cullet powder - 75%., powders are moistened up to 5-7% and granulated up to 1-3 mm.

Component Feature:

1. Broken sheet glass of the following chemical composition (wt.%): SiO ₂ - 72.0; Na ₂ O - 14.5; CaO - 6.8; Al ₂ O ₃ - 3.2; MgO - 3.4; Fe ₂ O ₃ - 0.05; SO ₃ - 0.5.

2. Copper powder according to GOST - 4960-2017.

3. Water GOST 17.1.1.04-80.

Copper powder 25% and glass powder finely ground in a ball mill 75% were moistened to 5-7% and averaged in a mixer at 15 minutes. The mixture was granulated in a laboratory granulator to obtain 1-3 mm granules. The granules were placed in the powder feeder of the UPU-8m electric arc plasma torch. The arc was ignited and the plasma-forming argon gas and charge were supplied to the plasma torch at a flow rate of 3.0 g/sec.

In a plasma torch with an average mass temperature of a plasma torch of 6000ºС, instantaneous melting of the charge occurred with the formation of spherical molten particles. Under the action of the outgoing plasma-forming argon gas, the particles were transformed into the accumulator zone, where they were cooled and accumulated in the receiving collector.

Then the obtained samples were analyzed.

The research results are presented in Table No. 1.

Table 1

Qualitative characteristics of the obtained samples glass-metal microballoons

The ratio of copper powder and cullet,% Diffuse reflection coefficient (DR, %) Percentage of marriage, % copper cullet 35 65 68 2.2 25* 75* 72* 1.5* 20 80 69 2.5 * - the best option

The number of perfectly spherical particles of glass-metal microspheres with a size of 400-3000 microns was 98.5%.

The diffuse reflection coefficient, carried out on the POS-1 device according to the standard method, was 72%.

Example

Copper powder 0.25 kg and glass powder finely ground in a ball mill 0.75 kg were moistened to 5%, averaged in a laboratory mixer for 15 minutes. The mixture was granulated in a laboratory granulator until 1–3 mm granules were obtained. The granules were placed in the powder feeder of the UPU-8m electric arc plasma torch. The arc was ignited and the plasma-forming argon gas and charge were supplied to the plasma torch at a flow rate of 3.0 g/sec.

In a plasma torch with an average mass temperature of a plasma torch of 6000ºС, instantaneous melting of the charge occurred with the formation of spherical molten particles. Under the action of the outgoing plasma-forming argon gas, the particles were transformed into the accumulator zone, where they were cooled and accumulated in the collector.

The number of perfectly spherical particles of glass-metal microspheres with a size of 400-3000 microns was 98.5%, the amount of rejects was 1.5%.

The diffuse reflection coefficient, carried out on the POS-1 device according to the standard method, was 72%.

Thus, with the developed charge composition for the production of glass-metal microspheres, high-quality glass-metal microspheres were obtained, with a low amount of rejects, without the use of any additional binder components.

Claims (3)

The charge for obtaining glass-metal microspheres, including copper powder and fine cullet powder, characterized in that copper powder and fine cullet powder are used at the following mass ratios, wt.%: copper powder 25% cullet powder 75% powders are moistened up to 5-7% and granulated up to 1-3 mm.