Low-cost safe preservation method for high-purity barium nitrate

A barium nitrate, low-cost technology, applied in the direction of calcium/strontium/barium nitrate, etc., can solve problems such as unstable performance, difficulty in weighing barium nitrate, and inapplicability to high-end product use conditions, etc., to achieve good elasticity and strength, Improve the compactness and matrix physical stability and chemical stability, the effect of compactness enhancement

Inactive Publication Date: 2019-11-26
王晓璐
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Similarly, in high-end applications, barium nitrate with high water content is difficult to weigh and unstable in performance, and cannot be used in high-end products. However, the inherent micro-water absorption of barium nitrate is a major problem that needs to be overcome.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A low-cost safe preservation method for high-purity barium nitrate, comprising the following steps:

[0023] 1) Preparation before production

[0024] ① Raw material preparation: Prepare 7g of emulsion A containing 38% unsaturated polyester diol by weight, 3g of emulsion B containing 22% unsaturated polyether polyol by weight, blocked isocyanate crosslinking 0.03g of antifoaming agent, 0.08g of defoaming agent, 1.2g of tapioca starch, 0.4g of acrylic acid monomer, 1kg of spectrum pure barium nitrate powder to be packaged;

[0025] ②Auxiliary material preparation: prepare enough deionized water and NaOH aqueous solution;

[0026] 2) Pre-preparation of hygroscopic ingredients

[0027] ①Immerse the cassava starch prepared in stage 1) step ① into deionized water 4 times its mass, stir evenly to obtain a paste liquid, and then put the acrylic acid monomer prepared in stage 1) step ① into the paste liquid to obtain an acidified paste liquid;

[0028] ② Use the NaOH aqueou...

Embodiment 2

[0037] A low-cost safe preservation method for high-purity barium nitrate, comprising the following steps:

[0038] 1) Preparation before production

[0039] ① Preparation of raw materials: 6 g of emulsion A containing 35% unsaturated polyester diol by mass fraction, 3.5 g of emulsion B containing 25% unsaturated polyether polyol by mass fraction, blocked isocyanate cross 0.02g of joint agent, 0.06g of defoamer, 1g of tapioca starch, 0.3g of acrylic acid monomer, 100g of spectrum pure barium nitrate powder to be packaged;

[0040] ②Auxiliary material preparation: prepare enough deionized water and NaOH aqueous solution;

[0041] 2) Pre-preparation of hygroscopic ingredients

[0042] ①Immerse the cassava starch prepared in stage 1) step ① into deionized water 4.5 times its mass, stir evenly to obtain a paste liquid, and then put the acrylic acid monomer prepared in stage 1) step ① into the paste liquid to obtain an acidified paste liquid;

[0043] ② Use the NaOH aqueous sol...

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PUM

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Abstract

The invention discloses a low-cost safe preservation method for high-purity barium nitrate. Low-cost safe preservation is finally achieved through taking a dense polyurethane film envelope, which is dominated by polyester polyurethane and assisted by polyether polyurethane, as a matrix of an encapsulating material, taking blocked isocyanate as a cross-linker, taking starch grafted sodium acrylateas a blocking agent of unsaturated groups of the dense polyurethane film envelope and meanwhile as a water absorption functional ingredient of the entire encapsulating material, finally obtaining theencapsulating material, and then, subjecting high-purity barium nitrate to vacuum encapsulation by employing the material. The method has the advantages of high density, low cost, high water absorptivity and high reliability.

Description

technical field [0001] The invention relates to the technical field of preparation of fine inorganic chemical fillers, in particular to a low-cost safe storage method for high-purity barium nitrate. Background technique [0002] High-purity barium nitrate is owing to have strong oxidizing property, and the container of general dress can't be preserved stably for a long time, thereby the preservation of high-purity barium nitrate in the prior art all has light requirement, humidity requirement again, also has ventilation requirement, plant construction cost, Container replacement costs and transportation costs are high, which limits the application of high-purity barium nitrate, especially spectrally pure barium nitrate. [0003] In the field of high-precision technology, high-purity barium nitrate is mainly used in the production of barium titanate and the final preparation of low-temperature ceramic MLCC components. Compared with high-purity barium chloride, the use of high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/44
CPCC01F11/44
Inventor 王晓璐
Owner 王晓璐
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