Method for synthesizing sodium titanate whisker

A sodium hexatitanate whisker and synthesis method technology, applied in chemical instruments and methods, single crystal growth, crystal growth, etc., can solve the problems of difficult industrialization, difficulty of sodium hexatitanate whisker, high cost, etc., and achieve heat conduction The effect of small coefficient, low cost, and high infrared reflectivity

Inactive Publication Date: 2008-02-06
上海秀普复合材料有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to synthesize sodium hexatitanate whiskers by sintering
There are also sodium titanate nanotubes and doped (mainly actinide and lanthanide) sodium titanate synthesis methods, which are difficult to achieve industrialization, and the cost is also very high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Mix anatase titanium dioxide and anhydrous sodium carbonate according to TiO 2 :Na 2 O=2.9 Molar ratio ratio weighing, pour the weighed raw materials together and mix evenly;

[0021] (2) Put the above-mentioned homogeneously mixed raw materials into a high-temperature furnace at 1100° C., and stay there for 90 minutes to make the raw material mixture into a melt;

[0022] (3) The above-mentioned melt is taken out, and quenched on a special quenching machine operating at high speed, so that it is dispersed into a fine powder with uniform particles; at this time, sodium trititanate whiskers are formed;

[0023] (4) Enter the above-mentioned fine powder into a reactor containing 5% sulfuric acid at 90° C. according to the solid-to-liquid ratio of 1:10, and react for 360 minutes;

[0024] (5) The solution in the above-mentioned reactor is entered into the filter, and the solid-liquid separation is carried out, and the liquid part is accumulated separately, which is a...

Embodiment 2

[0029] (1) Mix anatase powder and anhydrous sodium bicarbonate according to TiO 2 :Na 2 O=2.5 mol ratio ratio weighing, the flux sodium sulfate is weighed by 2% of the total amount, the weighed raw materials are poured together and mixed evenly;

[0030] (2) Put the above-mentioned uniformly mixed raw materials into a high-temperature furnace at 1050° C., and stay for 100 minutes to make the raw material mixture into a melt;

[0031] (3) The above-mentioned melt is taken out, and quenched on a special quenching machine operating at high speed, so that it is dispersed into a fine powder with uniform particles; at this time, sodium trititanate whiskers are formed;

[0032] (4) Enter the above-mentioned fine powder into a reactor containing 14% sulfuric acid at 95° C. according to the solid-to-liquid ratio of 1:8, and react for 260 minutes;

[0033] (5) The solution in the above-mentioned reactor is entered into the filter, and the solid-liquid separation is carried out, and th...

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Abstract

The present invention discloses a manufacturing method for sodium hexa-titanate whiskers. Adopting the melting-quenching method of synthesis, the method comprises: mixing titanium-containing raw material, sodium-containing raw material and fluxing agents first; sintering in a high-temperature container until the mixture becomes molten; taking out the molten mixture and quenching on a special quenching device; dissolving part sodium ions in an acid solution; sintering after filtering, washing and drying, then finished product can be obtained; the technological flow is simple and feasible; and the whole process has no pollution. The sodium hexa-titanate whiskers synthesized with the method of the present invention has low cost, low thermal conductivity and high infrared-ray reflectivity. The sodium hexa-titanate whiskers are 10-50 micrometers in average length and 1-5 micrometers in average diameter and can be used as enhancing material, friction material, heat insulation material, etc.

Description

technical field [0001] The invention belongs to a method for manufacturing inorganic salt whiskers, in particular to a method for manufacturing sodium hexatitanate whiskers. Background technique [0002] Sodium hexatitanate whiskers have very stable properties and high mechanical strength. As reinforcing materials and friction materials, they are widely used, especially for their low thermal conductivity and high infrared reflectivity. They are very excellent. Insulation materials. [0003] In the synthesis of sodium hexatitanate whiskers, there are mainly hydrothermal methods, that is, hydrothermal synthesis under high temperature and high pressure. It is difficult to synthesize sodium hexatitanate whiskers by sintering. There are also sodium titanate nanotubes and doped (mainly actinide and lanthanide) sodium titanate synthesis methods, which are difficult to achieve industrialization, and the cost is also very high. [0004] There are many ways to synthesize sodium hex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/32C30B29/62
Inventor 黄继芬岳双霞赵力力赵力杰
Owner 上海秀普复合材料有限公司
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