Check patentability & draft patents in minutes with Patsnap Eureka AI!

Process for preparing magnesium borate whiskers with high aspect ratio by utilizing carnallite

A magnesium borate whisker, high aspect ratio technology, applied in the direction of single crystal growth, crystal growth, single crystal growth, etc., can solve the problems of increasing process complexity, difficulty, and high cost, reducing mixing time and improving utilization. rate, good quality

Inactive Publication Date: 2010-12-29
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process does not use a spray drying procedure, which reduces energy consumption; however, it is difficult to filter the precipitation of magnesium borate compounds in this process, and it is necessary to add organic solvents for mixing, which is costly and increases the complexity of the process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for preparing magnesium borate whiskers with high aspect ratio by utilizing carnallite
  • Process for preparing magnesium borate whiskers with high aspect ratio by utilizing carnallite
  • Process for preparing magnesium borate whiskers with high aspect ratio by utilizing carnallite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 A process for preparing magnesium borate whiskers with high aspect ratio using carnallite includes the following steps:

[0034] (1) Pretreatment: Dissolve carnallite in water at a solid-liquid mass ratio of 1:0.9. In order to accelerate its dissolution, it can be heated at a temperature of 70~90℃; after dissolution, use a circulating water vacuum pump to remove it. Insoluble matter, get carnallite solution.

[0035] (2) Mixing reaction: adding boric acid and alkali-potassium hydroxide to the carnallite solution obtained in step (1), using a timing electric stirrer to stir at a rate of 200-300r / min to make it uniformly mixed; reaction Then, it is directly dried at a temperature of 50° C., crushed by a ball mill, and passed through a 120-mesh sieve to obtain a uniformly mixed sintered material.

[0036] The mass ratio of carnallite to boric acid and alkali is 4.9:1:1.6.

[0037] (3) Sintering: Place the sintered material obtained in step (2) in a corundum crucible, pu...

Embodiment 2

[0040] Example 2 A process for preparing magnesium borate whiskers with high aspect ratio using carnallite includes the following steps:

[0041] (1) Pretreatment: Dissolve carnallite in water at a solid-to-liquid mass ratio of 1:1.5. In order to accelerate its dissolution, it can be heated at a temperature of 70-90℃; after dissolution, use a circulating water vacuum pump to remove Insoluble matter, get carnallite solution.

[0042] (2) Mixing reaction: add boric acid, alkali-sodium hydroxide and flux potassium chloride to the carnallite solution obtained in step (1), and stir at a rate of 200-300r / min with a timing electric stirrer Make it uniformly mixed; after the reaction, it is directly dried at a temperature of 100° C., crushed by a ball mill, and passed through a 120-mesh sieve to obtain a uniformly mixed sintered material.

[0043] The mass ratio of carnallite to boric acid, alkali and flux is 4.0:1:0.9:5.0.

[0044] (3) Sintering: Place the sintered material obtained in step...

Embodiment 3

[0047] Example 3 A process for preparing magnesium borate whiskers with high aspect ratio by using carnallite includes the following steps:

[0048] (1) Pre-treatment: Dissolve carnallite in water at a solid-liquid mass ratio of 1:2.0. In order to accelerate its dissolution, it can be heated at a temperature of 70-90℃; after dissolution, use a circulating water vacuum pump to remove it. Insoluble matter, get carnallite solution.

[0049] (2) Mixing reaction: add boric acid, sodium hydroxide and flux potassium chloride to the carnallite solution obtained in step (1), and stir it evenly with a timing electric stirrer at a rate of 200-300r / min Mixing; After the reaction, it is directly dried at a temperature of 200°C, crushed by a ball mill, and then passed through a 120-mesh sieve to obtain a uniformly mixed sintered material.

[0050] The mass ratio of carnallite to boric acid, alkali and flux is 3.2:1:1.3:5.5.

[0051] (3) Sintering: Put the sintered material obtained in step (2) int...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a process for preparing magnesium borate whiskers with high aspect ratio by utilizing carnallite, comprising the following steps: (1) pretreatment: proportionally dissolving carnallite in water, removing the undissolved substances by filtration and obtaining the carnallite solution; (2) mixing reaction: mixing boric acid, alkali, fluxing agents and the carnallite solution obtained in the step (1) to react and then sieving the reactants after drying the reactants at 50-200 DEG C and grinding the dried reactants to obtain the sintering materials; (3) sintering: heating the sintering materials obtained in the step (2) under the constant temperature of 750-950 DEG C for 2-10h and obtaining sinter cakes after natural cooling; and (4) aftertreatment: obtaining filter residues and filtrate after infiltrating the sinter cakes in water at 50-95 DEG C and centrifugally washing the sinter cakes, obtaining the magnesium borate whiskers after the filter residues are dried and simultaneously obtaining the byproduct potassium chloride after the filtrate is evaporated and filtered. The synthesis process is simple, not only reduces the quantity of the additional fluxing agents and the mixing time, but also improves the utilization ratio of the resources and the economic benefits of production.

Description

Technical field [0001] The invention relates to a process for preparing magnesium borate whiskers, in particular to a process for preparing magnesium borate whiskers with high aspect ratio by using carnallite. Background technique [0002] With the rapid development of modern science and technology, new composite materials with light weight, high toughness, high strength, high modulus, and high temperature resistance have attracted great attention. Because of their excellent physical and mechanical properties, whiskers have increased their strength in materials. The tough aspect shows excellent application prospects. There are more than hundreds of whisker products developed today, but only a few are applied to production practice. Some have poor performance, and some have good performance, such as metal, carbide, nitride and other whisker products. Because the production cost is too high, it can only be applied in high-tech industries such as defense and aerospace, and it is di...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22C30B29/62
Inventor 李武朱东海乃学瑛孙秋菊董亚萍边绍菊卢会刚孟庆芬
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com