Preparation method of large-particle-size high-purity aluminum sol
By combining seed crystal preparation and secondary growth with hydrothermal reaction and chelating agent treatment, the problems of uneven particle size and high impurity content in aluminum sol in the existing technology have been solved, and a high-purity large-particle-size aluminum sol suitable for high-end electronic ceramic materials has been prepared.
CN117732382BActive Publication Date: 2026-05-29AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
- Filing Date
- 2023-10-18
- Publication Date
- 2026-05-29
AI Technical Summary
Technical Problem
Existing technologies struggle to prepare high-purity, uniformly sized large-particle aluminum sols, especially when controlling the content of metal impurities to be extremely low.
Method used
By preparing and growing seed crystals, combined with alkoxide hydrolysis technology, and using the hydrothermal reaction of organic aluminum alkoxide, alcohol solvent and catalyst, and then controlling the addition of droplets A and B and using chelating agents, large-particle-size, high-purity aluminum sol can be prepared.
Benefits of technology
It achieves larger and more uniform aluminum sol particle size distribution with low metal impurity content, making it suitable for chemical mechanical polishing in the field of high-end electronic ceramic materials.
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Figure CN117732382B_ABST
Abstract
The application provides a preparation method of high-purity aluminum sol with large particle size, and belongs to the field of inorganic nanometer materials. The aluminum sol seed is prepared from organic aluminum alcohol, high-purity water, an alcohol solvent and a catalyst, and is subjected to heating reflux; dropwise adding liquid prepared from organic aluminum alcohol and the alcohol solvent, and dropwise adding liquid prepared from high-purity water and the catalyst are added, so that the crude aluminum sol is obtained; the crude aluminum sol is heated, and dropwise adding liquid prepared from a chelating agent and the alcohol solvent is added, and then evaporation and solvent replacement are carried out, so that the high-purity aluminum sol with large particle size is obtained. The application realizes controllable preparation of the aluminum sol with large particle size, uniform particle size and low metal impurity content through preparation of the seed and secondary growth of the seed, and improves the average particle size and size uniformity of the sol particles.
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