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A kind of preparation method of flux crucible cover

A crucible cover and flux technology, applied in crucibles, chemical instruments and methods, inorganic chemistry, etc., can solve the problems that the covering operation cannot be completed in batches, the thickness of the covering layer is difficult to control, and the amount of flux is difficult to control, so as to achieve good protection effect and thickness Consistent, splash-resistant results

Active Publication Date: 2019-07-09
宁波飞创制药设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above technical defects are: 1. It takes a long time to evenly spread the flux; 2. It is difficult to control the thickness of the covering layer; 3. It is difficult to control the amount of flux; 4. The covering operation cannot be completed in batches, and the efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing a flux crucible cover. The preparation method described in this embodiment is:

[0022] Step 1. Mix boric acid and lithium carbonate at a molar ratio of 4:1 to obtain a mixture, then add 30 to 40 wt% pure water to the mixture, mix for 0.5 to 1.4 hours, and seal at 10 to 40°C Stand still for 1-80 hours to prepare lithium tetraborate slurry.

[0023] Step 2: transfer the lithium tetraborate slurry into a cylindrical mold, cover with a layer of polyethylene film, press molding, and then dry at 10-60°C to obtain a flux crucible cover.

[0024] The substrate of the cylindrical mold is also a layer of polyethylene film; the thickness of the layer of polyethylene film is 0.005-0.008mm.

[0025] The material of the cylinder mold is plastic.

Embodiment 2

[0027] A method for preparing a flux crucible cover. The preparation method described in this embodiment is:

[0028] Step 1. Mix boric acid and lithium carbonate at a molar ratio of 4:1 to obtain a mixture, then add 35 to 45 wt% of pure water to the mixture, mix for 0.8 to 1.7 hours, and seal at 10 to 40°C Stand still for 20-100 hours to prepare lithium tetraborate slurry.

[0029] Step 2: transfer the lithium tetraborate slurry into a cylindrical mold, cover with a layer of polyethylene film, press molding, and then dry at 30-80°C to obtain a flux crucible cover.

[0030] The substrate of the cylindrical mold is also a layer of polyethylene film; the thickness of the layer of polyethylene film is 0.006-0.009mm.

[0031] The material of the cylinder mold is wood.

Embodiment 3

[0033] A method for preparing a flux crucible cover. The preparation method described in this embodiment is:

[0034] Step 1. Mix boric acid and lithium carbonate at a molar ratio of 4:1 to obtain a mixture, then add 40-50wt% pure water to the mixture, mix for 1.1-2 hours, and seal at 10-40°C Stand still for 40-120 hours to prepare lithium tetraborate slurry.

[0035] Step 2: Transfer the lithium tetraborate slurry into a cylindrical mold, cover with a layer of polyethylene film, form it under pressure, and then dry it at 50-100°C to obtain a flux crucible cover.

[0036] The substrate of the cylindrical mold is also a layer of polyethylene film; the thickness of the layer of polyethylene film is 0.007-0.01mm.

[0037] The material of the cylinder mold is steel.

[0038] This specific embodiment makes full use of the characteristic that lithium tetraborate is slightly soluble in water, uses lithium tetraborate and water as the binding agent to make lithium tetraborate stick...

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Abstract

The invention specifically relates to a preparing method of a flux bushing lid. According to the technical scheme, the method comprises the steps of mixing boric acid and lithium carbonate on the basis that the mole ratio is 4:1 to obtain a mixture, then adding purified water which is 30-50 wt% of the mixture, conducting mixing for 0.5-2 h, and performing sealing and standing at 10-40 DEG C for 1-120 h to prepare lithium tetraborate slurry; transferring the lithium tetraborate slurry into a cylinder mold, covering the lithium tetraborate slurry with a layer of polyethylene film, performing extrusion forming, and then conducting drying at 10-100 DEG C to prepare the flux bushing lid. A substrate of the cylinder mold is a layer of polyethylene film as well. The thickness of the layer of polyethylene film is 0.005-0.01 mm. The H3BO3 content of boric acid powder is bigger than or equal to 99.9 wt%, and the particle size of the boric acid powder is smaller than 0.5 mm. The Li2CO3 content of lithium carbonate powder is bigger than or equal to 99.9 wt%, and the particle size of the lithium carbonate powder is smaller than 0.5 mm. The preparing method of the flux bushing lid has the advantages of being simple in operation, good in splashing-prevention effect and high in efficiency and saving time.

Description

technical field [0001] The invention belongs to the field of flux crucible technology. Specifically relates to a preparation method of a flux crucible cover. Background technique [0002] At present, when preparing a glass sheet sample by XRF fusion, it is necessary to melt the sample in a platinum crucible with a flux (lithium tetraborate or lithium metaborate). The method is to mix the flux with the sample and place it in a platinum crucible. Then evenly cover a layer of flux to prevent splashing during the melting process. When covering with powder flux, since the melting speed of the same powder flux is higher than that of bulk flux, it will melt together with the flux in a short time after the melting reaction starts, so the covering efficiency is low. Since there is no binding force between the powder particles, a small volume change in the local melting reaction will cause the coating to fail. [0003] The above-mentioned technical defects are: 1. It takes a long ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01L3/04C01D15/00
CPCB01L3/04B01L2200/12B01L2300/042C01D15/00
Inventor 徐建平周双清
Owner 宁波飞创制药设备有限公司