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Method for synthesizing potassium hexatitanate crystal whisker

A technology of potassium hexatitanate whiskers and synthesis methods, which is applied in chemical instruments and methods, single crystal growth, crystal growth, etc., and can solve the problems of increased breaking amount of potassium hexatitanate whiskers, insufficient potassium ion dissolution, and influence on Product uniformity and other issues, to achieve the effect of superior high-temperature sound-absorbing performance, low cost, and less non-acicular particles

Active Publication Date: 2011-11-23
上海秀普复合材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the pH value of the solution is not strictly controlled, when the pH value is greater than or equal to 12, insufficient potassium ions are dissolved out, and potassium tetratitanate is formed in the product, which affects the quality of the product and the purity is not high.
[0008] 5 In the washing process, as a special washing step, it undoubtedly increases the process and significantly increases the cost
The secondary dispersion washing operation and filtration operation of potassium hexatitanate whiskers further increased the breaking amount of potassium hexatitanate whiskers, which also affected the uniformity of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Mix anatase titanium dioxide and anhydrous potassium carbonate according to TiO 2 :K 2 The ratio of O=1.9 molar ratio is weighed and mixed evenly with the flux boric acid, and the flux boric acid is weighed according to 3% of the total amount of anatase titanium dioxide, anhydrous potassium carbonate and flux boric acid, and the weighed raw materials are poured mix together evenly;

[0029] (2) Put the above-mentioned homogeneously mixed raw materials into a high-temperature furnace at 1100° C., and stay there for 60 minutes to make the raw material mixture into a melt;

[0030] (3) The above-mentioned molten body is taken out, and quenched on a special quenching machine operating at high speed, so that it is dispersed into a fine powder with a uniform particle diameter of 0.5 mm; at this time, potassium dititanate whiskers are formed;

[0031] (4) Put the above-mentioned fine powder into a hot water reactor at 90°C according to the solid-to-liquid ratio of 1:10, ...

Embodiment 2

[0037] (1) Dilute anatase and anhydrous potassium bicarbonate according to TiO 2 :K 2 The proportional weighing of O=2.0 mol ratio mixes evenly with flux potassium sulfate, and flux potassium sulfate is weighed by 2% of the total amount of anatase and anhydrous potassium bicarbonate and flux potassium sulfate;

[0038] (2) Put the above-mentioned uniformly mixed raw materials into a high-temperature furnace at 1050° C., and stay for 40 minutes to make the raw material mixture into a melt;

[0039] (3) The above-mentioned molten body is taken out, and quenched on a special quenching machine operating at high speed, so that it is dispersed into a fine powder with a uniform particle diameter of 0.8 mm; at this time, potassium dititanate whiskers are formed;

[0040] (4) Put the above-mentioned fine powder into a hot water reactor at 95°C according to the solid-to-liquid ratio of 1:8, use 4% sulfuric acid solution to control the pH value of the solution to 10-12, and react for 16...

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Abstract

The present invention discloses a manufacturing method of K2Ti6O13 whiskers. The method adopts a process of melting quench method for synthesis, and the technological process is simple and practicable. First, a raw material with titanium, a raw material with potassium and fluxing agent are mixed up, to put in a container with high-temperature to sinter, take out after fusing, quench on the singlepurpose quenching equipment, to generate uniform fine powder with the grain size smaller than 1 mm, then the uniform fine powder is put in a hot water reactor, to control the amount of dissolved potassium ion by using the method of liquor acid degree controlling, after the reaction is finished, a final product can be obtained through filtrating, repeatedly cleaning by using the 1 to 4 DEG C basicion removing water, drying, and sintering. The whole process is pollution free. The K2Ti6O13 whiskers which are gained by the process synthetic method of the present invention have an average length of 10 to 50 micron, and an average diameter of 1 to 5 micron. The present invention has the advantages that the non-acicular particles is little, the coefficient of heat conductivity is low, the reflectivity of the infrared ray is high, the high temperature acoustic absorptivity is greater than 20 percent, and the cost is low. The K2Ti6O13 whiskers which are compounded by the method can be processed into grains of about 2 micron by a machine, to suit the requirements in different occasions. The yield of the K2Ti6O13 whiskers is larger than 96 percent.

Description

technical field [0001] The invention belongs to a method for manufacturing inorganic salt whiskers, in particular to a method for manufacturing potassium hexatitanate whiskers. Background technique [0002] In the prior art, Chinese patent application No. 01134183.1 discloses a method for producing potassium hexatitanate whiskers. The process is to mix the titanium source and the potassium source in proportion, and sinter to form a melt; The above-mentioned molten body is cooled rapidly, and the molten body is extruded into thin sheets by two rollers at the same time of quenching; dispersed to make a suspension; separated from the suspension to make it into a powder; dried; high-temperature recrystallization and sintering to make It becomes dispersed needle-like crystals; secondary dispersion treatment, heating, dehydration with a centrifuge, and washing with pure water until there is no anion; secondary drying. [0003] The disadvantages of this potassium hexatitanate whis...

Claims

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Application Information

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