Purification method of B4Si and B6Si

A purification method and powder technology, applied in the field of materials, can solve problems such as limited purity improvement, complicated process, and environmental pollution

Active Publication Date: 2021-07-20
HARBIN INST OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above impurity removal methods still have obvious defects such as limited purity improvement, low recovery rate, environmental pollution, and complicated process.

Method used

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  • Purification method of B4Si and B6Si
  • Purification method of B4Si and B6Si
  • Purification method of B4Si and B6Si

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] B 4 Si purified process:

[0058] 1. The drugs and reagents used in this example are shown in the table below:

[0059] Table 1 Experimental drugs and reagents

[0060]

[0061] 2. The instrument used is as shown in Table 2:

[0062] Table 2 Experimental instrument table

[0063]

[0064] In addition, other supplies materials used in the experiment are from chemical agents such as disposable plastic droppers, plastic cylinders (500 mL, and 250 mL), nitrile gloves, magnetic stirrer, brine funnel, water-based / organic microporous filtration Membrane, medium speed / slow quantitative analysis of filter paper, sand core funnel, etc .; formulated solutions and reactions are deionized water; polytetrafluoroethylene beaker (250 ml and 500 mL), stir bar, from customization.

[0065] 3, B 4 Si Process Exploration Experiment

[0066] 3.1 filtration separation

[0067] In order to treat B 4 Si is effectively separated from the impurity solution, first using filtration methods. Sp...

Embodiment 2

[0139] B 6 Si purified process:

[0140] The instrument apparatus used in this example is in Example 1, and the purified process explores the same embodiment 1.

[0141] 1, this example B 6 Si experimental process:

[0142] Since this example is found to B 6 After the addition of the hydrogen peroxide, it is more stable after adding KOH, but after the addition of KOH, there is a large amount of bubbles inside the system, mainly due to less ingredients Si and B in the powder, excessive hydrogen peroxide, and the KOH reaction forms oxygen . Based on this, this embodiment is optimized (such as Figure 10 Optimize the experimental process and sample maps), performing factors to find the best process.

[0143] 1.1, hydrogen peroxide dosage optimization (3 ml, 5mL, 10mL, 15ml, 20ml, 25ml)

[0144] Considering that the hydrogen peroxide is severe, the reaction is unstable and the sample spillation is caused, so it is first considered to optimize the amount of hydrogen peroxide, and the sp...

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PUM

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Abstract

The invention discloses a purification method of B4Si and B6Si, relates to the field of materials, and aims to solve the problems of complex purification process and low purification purity of the B4Si and B6Si. From the perspective of economy and easiness in implementation, the invention provides the following purification treatment process thought: firstly, carrying out oxidation treatment on powder, converting part of elementary substances such as B and Si into corresponding oxides, then conducting treating with concentrated KOH under a heating condition, converting corresponding impurities into water-soluble substances, and achieving a purification effect through a series of treatments. The method is applied to the field of powder material purification.

Description

Technical field [0001] The present invention relates to the field of materials, and specific to one B 4 Si and B 6 Principle of Si. Background technique [0002] B 4 Si and B 6 Si is a special material with high thermal and chemical stability, which is important in the fields of electronics, aerospace and other areas. B 4 Si usually prepares high-temperature solid phase sintered under vacuum or argon protected by high purity B and Si, and can be achieved by controlling the ratio of reactants B and Si. 4 The yield and purity of Si are high, less impurity content, and small amounts of impurity components are primarily single Si and B and very small SIOs. 2 Bind 2 O 3 Oxide, etc. In addition, the purity of material is serious about its performance, so if B is guaranteed 4 Excellent performance of Si, must be made 4 Si is further purified to remove the impurity phase. [0003] In order to make high-purity boride, silicides, and carbides, scientists have reported a variety of effectiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B35/02
CPCC01B35/02C01P2002/72C01P2004/01
Inventor 李明伟孙宇雷董国华张庆猛钟业盛杨剑民陈均优史丽萍赫晓东张文治何飞
Owner HARBIN INST OF TECH
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