Böhmitstruktur und verfahren zur herstellung davon

AT1898842TInactive Publication Date: 2026-04-15PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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Patent Information

Application Number
AT2022883506T
Authority / Receiving Office
AT · AT
Patent Type
Patents
Current Assignee / Owner
Priority Date
2021-10-19
Filing Date
2022-10-14
Publication Date
2026-04-15
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing methods for producing boehmite structures result in molded bodies with impurities and insufficient mechanical strength, particularly when using sodium or calcium hydroxide as reaction promoters, limiting their application in high-strength applications.

Method used

A boehmite structure is developed with boehmite particles bonded to each other, featuring crystallite sizes of 10 nm or less and porosity of 15% or less, produced through a method involving mechanochemical treatment of hydraulic alumina and pressure heating, eliminating the need for impurity-promoting substances and enhancing mechanical strength.

Benefits of technology

The resulting boehmite structure achieves high flexural strength of 50 MPa or more, improved durability, and maintains chemical stability and heat resistance, suitable for demanding applications without the presence of impurities.

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Abstract

Provided is a boehmite structure 1 including a plurality of boehmite particles 2 where adjacent boehmite particles 2 are bonded to each other. In the boehmite structure 1, a boehmite crystallite size is 10 nm or less, and a porosity is 15% or less. Also provided is a method for producing the boehmite structure 1, including a mixing step of obtaining a mixture by mixing mechanochemically treated hydraulic alumina with a solvent including water, and a pressure heating step of pressurizing and heating the mixture under a condition of a pressure of 10 to 600 MPa and a temperature of 50 to 300 °C.
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