Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Aluminium titanate nanofiber and preparation method thereof

A technology of nanofibers and aluminum titanate, which is applied in the field of aluminum titanate nanofibers and its preparation, can solve the problems of high equipment requirements, high doping costs, and high production costs, and achieve good thermal shock resistance, low thermal expansion coefficient, The effect of mild reaction conditions

Inactive Publication Date: 2010-08-18
周绍春
View PDF19 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Doping is used to modify aluminum titanate. The thermal shock resistance of the modified phase itself and the matching problem with the thermal expansion coefficient of aluminum titanate have yet to be resolved (patent 200810177945.5); the doping preparation process is complicated and usually requires the help of High-temperature solid-state reaction produces aluminum titanate, and the dopant phase cannot be uniformly distributed in aluminum titanate, resulting in local residual stress concentration of the sintered body, uneven modification makes the modification effect poor, and the use of a large amount of dispersant also leads to modification High cost and complex material composition (patent 200610005317.X); or use of more expensive organic titanium sources or highly corrosive inorganic titanium salts (patents 200810106860.8, 200610005315.0), resulting in high doping costs and not suitable for large-scale production
[0004] In addition, alcohol is used as solvent, corrosive titanium tetrachloride and aluminum nitrate are used as raw materials, and sol is obtained after heat reflux and vacuum degassing. Raw materials for acid aluminum fibers or films (patents 200710166722.4, 200710166723.9), but the sol preparation process involved in the invention involves acid corrosion and vacuum treatment, which requires high equipment and requires the use of more organic solvents, organic stabilizers and organic additives. make the preparation cost higher

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
  • Aluminium titanate nanofiber and preparation method thereof
  • Aluminium titanate nanofiber and preparation method thereof
  • Aluminium titanate nanofiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 5 grams of titanium dioxide and 16.7 grams of aluminum chloride, add 100 milliliters of 5mol L successively under mechanical stirring -1 The sodium hydroxide solution was transferred to a threaded sealed tank lined with polytetrafluoroethylene, and reacted at 100°C for 30 hours under airtight stirring. After the reaction tank was naturally cooled, a milky white precursor was obtained; The prepared milky white precursor is repeatedly centrifuged and washed until it does not contain sodium ions and chloride ions, and then the deionized precursor is dried at 120°C; finally, the precursor is kept at 300°C for 300 minutes in a crucible electric furnace, and 1300°C After heat preservation for 60 minutes and programmed firing, the aluminum titanate nanofibers with a diameter of about 45-65 nm and a length of about 3-8 μm were obtained by manual grinding in a porcelain crucible.

Embodiment 2

[0025] Weigh 3 grams of titanium dioxide and 16.3 grams of aluminum nitrate, add 50 milliliters of 6mol L successively under ultrasonic dispersion -1 Potassium hydroxide solution, transferred to a threaded sealed tank lined with polytetrafluoroethylene, and reacted at 210 ° C for 6 hours under airtight stirring. After the reaction tank was naturally cooled, a milky white precursor was obtained; followed by deionized water. The prepared milky white precursor was repeatedly centrifuged and washed to contain no potassium ions and nitrate ions, and then the deionized precursor was dried at 120°C; finally, the precursor was kept at 500°C for 120 minutes and 900°C in a crucible electric furnace. After 180 minutes of heat preservation at ℃ and programmed roasting, it is manually ground in a porcelain crucible to obtain aluminum titanate nanofibers with a diameter of about 35-50 nm and a length of about 5-12 μm.

Embodiment 3

[0027] Weigh 6 grams of titanium dioxide and 25.7 grams of aluminum sulfate, and add 75 milliliters of 8mol L successively under ultrasonic dispersion -1 The sodium hydroxide solution was transferred to a threaded sealed tank lined with polytetrafluoroethylene, and reacted at 110°C for 20 hours under airtight stirring. After the reaction tank was naturally cooled, a milky white precursor was obtained; The prepared milky white precursor was repeatedly centrifuged and washed until it was free of sodium ions and sulfate ions, and then the deionized precursor was dried at 120°C; finally, the precursor was kept in a crucible electric furnace at 350°C for 270 minutes, 1200°C After heat preservation at ℃ for 90 minutes and programmed calcination, low-speed ball milling can obtain aluminum titanate nanofibers with a diameter of about 20-30 nm and a length of about 10-30 μm.

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

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to an aluminium titanate nanofiber and a preparation method thereof, wherein the preparation method comprises the following steps: firstly adding water-soluble aluminium salt or aluminum hydroxide or non-finite alumina and titanium pigment into a strongly alkaline solution, carrying out a hydro-thermal reaction under closed agitation, repeatedly centrifugally washing with deionized water to obtain a white precursor, subsequently roasting the precursor by adopting a program temperature rising mode to obtain the aluminium titanate nanofiber with the diameter of 20 to 90nm and the length of 3mum, and controlling the aluminium titanate nanofiber to have a hollow or solid structure through adjusting the temperature of the hydro-thermal reaction. The invention has simple process, lower equipment requirement, mild reaction condition, low preparation cost, low energy consumption and no generation of harmful discharge and is particularly suitable for large-scale production, the prepared aluminium titanate has a nanofiber structure, the length-diameter ratio thereof reaches above 100, and the aluminium titanate nanofiber not only has the advantage of low aluminium titanate thermal expansion coefficient, but also can be widely applied.

Description

technical field [0001] The invention relates to a low thermal expansion coefficient, high temperature resistant inorganic nanofiber and its preparation method, in particular to an aluminum titanate nanofiber and its preparation method, especially to the two-step preparation method of hydrothermal reaction and programmed temperature-controlled roasting A method for aluminum titanate nanofibers. Background technique [0002] my country is rich in titanium resources, the reserves of which rank first in the world, creating favorable conditions for the development of my country's titanate industry. However, compared with developed countries, my country's research and development of titanate products is still far behind. The country with large titanium resources is extremely disproportionate, so the development and research of titanate products is extremely urgent. Among many titanate substances, aluminum titanate is an inorganic special functional material with a very low coeffic...

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): C04B35/626C04B35/478
Inventor 周绍春张萍吴振军
Owner 周绍春
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com