Barium titanate low-dimensional nano powder material and its preparation method

A low-dimensional nanometer and nanopowder technology, applied in chemical instruments and methods, titanium compounds, calcium/strontium/barium compounds, etc., can solve the problem of large specific surface area and specific surface energy, high oxidation rate of fine-grained minerals, fine Mineral flotation problems and other problems, to achieve the effect of simple equipment, easy large-scale industrial production, and large-scale industrial production

Inactive Publication Date: 2005-11-23
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the fine particle size of minerals is small, its specific surface area and specific surface energy are large, which makes the oxidation rate of fine minerals high, the solubility increases, the non-selective adsorption of reagents, and the flotation rate are low, all of which make the flotation of fine minerals a problem

Method used

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  • Barium titanate low-dimensional nano powder material and its preparation method
  • Barium titanate low-dimensional nano powder material and its preparation method
  • Barium titanate low-dimensional nano powder material and its preparation method

Examples

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Effect test

Embodiment 1

[0036] Weigh 50 grams of barium titanyl oxalate powder, put it into a polyurethane tank, use agate balls as the ball milling medium, add 50 ml of deionized water, drop in 1 ml of oleic acid, stir slightly, add ammonia water to the slurry until the pH value is 9. Put the lid on the planetary mill at 250 rpm, and continuously ball mill for 12 hours to obtain a white slurry; pour it into a pear-shaped funnel, add 50 grams of deionized water, mix well, add 15ml of petroleum ether dropwise, and shake vigorously After 10 minutes, it was placed on the iron stand for more than 6 hours. It was observed that the two phases of oil and water were separated, and the barium titanyl oxalate powder was extracted into the floating oil phase. In the tray, dry in an oven at 80°C; after drying, the powder is sieved, moved into a muffle furnace for calcination at 800°C, and kept for half an hour to obtain monodisperse spherical barium titanate powder, the grain size and shape are as follows: imag...

Embodiment 2

[0038]Weigh 50 grams of barium titanyl oxalate powder, put it into a polyurethane tank, use agate balls as the ball milling medium, add 50ml of deionized water, drop in 1.5ml of oleic acid, stir slightly, add ammonia water to the slurry until the pH value 10, cover the tank on a planetary mill at 250 rpm, and continuously ball mill for 12 hours to obtain a white slurry; pour it into a pear-shaped funnel, add 50 grams of deionized water, mix well, add 15ml of petroleum ether and 20ml of Terpineol, vibrate vigorously for 15 minutes, and then put it on the iron stand for more than 12 hours. It is observed that the oil and water phases are separated, and the barium titanyl oxalate powder is extracted into the floating oil phase. The titanium barium oil aggregates are moved into a tray and dried in an oven at 100°C; after drying, the powder is sieved, moved into a muffle furnace for calcination at 800°C, and kept for half an hour to obtain one-dimensional barium titanate nanorod pow...

Embodiment 3

[0040] Weigh 50 grams of barium titanyl oxalate powder, put it into a polyurethane tank, use agate balls as the ball milling medium, add 50ml of deionized water, drop in 2ml of oleic acid, stir slightly, add ammonia water to the slurry until the pH value is 11. Put the lid on a planetary mill at 250 rpm and continuously ball mill for 10 hours to obtain a white slurry; pour it into a pear-shaped funnel, add 50 grams of deionized water, mix well, add 15ml of petroleum ether and 15ml of pine Oleyl alcohol, shake vigorously for 22 minutes, and put it on the iron stand for more than 24 hours. It is observed that the oil and water phases are separated, the barium titanyl oxalate powder is extracted into the sinking oil phase, and the lower barium titanyl oxalate oil aggregate is directly moved In the tray, dry at 90°C in an oven; after drying, sieve the powder, move it into a muffle furnace for calcination at 900°C, and keep it warm for 1 hour to obtain rod-shaped barium titanate pow...

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Abstract

The invention discloses a barium titanate low-dimensional nano powder material and its preparation method, which comprises using commercially available super fine barium titanyl oxalate powder for barium titanate production as principal raw material, employing a hydrophobic agglomeration sorting floatation process, changing the relative proportion of the surface active agent and the organic solvent powder, and carrying out the procedures of surface active agent wet method ball grinding adsorption, organic solvent pulping, emulsified stratification, extraction separation, drying and heat treatment.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a barium titanate low-dimensional nanopowder and a preparation method thereof. Background technique [0002] The preparation of low-dimensional materials has been a hot spot of scientific attention and research on nanomaterials in recent years. Particles with different microscopic shapes have different properties and applications. For structural ceramics, it is recognized that under the same process conditions, devices with more dense sintering, better mechanical properties, and higher product consistency can be obtained by using monodisperse near-spherical primary particles; and in 1991, it was discovered that carbon nano Since carbon nanotubes, due to its special chemical, physical and mechanical properties, it has attracted widespread attention from scientists from all over the world. By analogy, following carbon nanotubes, nanomaterials with one-d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00
Inventor 张中太罗绍华唐子龙闫俊萍
Owner TSINGHUA UNIV
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