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High-efficiency and energy-saving potassium titanate whisker preparation method

A potassium titanate whisker, high-efficiency and energy-saving technology, applied in the field of material chemistry, can solve problems such as waste of energy, low production efficiency, harsh preparation conditions, etc., to achieve improved energy utilization, excellent thermal insulation performance, and complete crystal structure Effect

Active Publication Date: 2011-02-02
马玉馨
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these methods, the product is mostly potassium hexatitanate, and potassium titanate whisker products with different compositions such as di, tetra, hexa and octa can not be accurately obtained through process control.
Some of the existing methods have harsh preparation conditions, high energy consumption, low yield, serious environmental pollution or low product purity (the product is not a pure white crystal, but a product with a yellow phase), and does not have the possibility of industrial production at all. ; Some methods need to add a co-solvent, not only the co-solvent is expensive, but also the separation cost is expensive
And for some technologies that are being produced, the waste heat generated by calcining kilns and shaping kilns has not been fully utilized, wasting energy
In addition, some production processes adopt the method of natural unweaving, and the production efficiency is too low

Method used

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  • High-efficiency and energy-saving potassium titanate whisker preparation method
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  • High-efficiency and energy-saving potassium titanate whisker preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh titanium source titanium dioxide and potassium source potassium oxide in a molar ratio of 1:1, mechanically grind the system until the system is uniform, and obtain the precursor required for the preparation of whiskers; place the above precursor in a crucible at 35°C, preheat The time is 5 hours; the preheated precursor is put into a continuous rotary calcination kiln for calcination, the temperature is 800°C, and the calcination time is 5 hours; The potassium dititanate is obtained by moisture absorption and deweaving in the kiln for 24 hours; the potassium dititanate is neutralized by a quantitative pickling device to complete the quantitative conversion of potassium ions and filtered to obtain titanium with different compositions. Potassium titanate whiskers; the obtained potassium titanate whiskers are subjected to high-temperature shaping treatment in a shaping kiln, the temperature of the shaping kiln is 500° C., and the shaping time is 5 hours. The pure wh...

Embodiment 2

[0030] Titanium source metatitanic acid and potassium source potassium hydroxide are weighed according to the ratio of the molar ratio of titanium to potassium atoms of 1:6, mechanically ground until the system is uniform, and the precursor required for preparing whiskers is obtained; the above precursor is placed in In the crucible at 500°C, the preheating time is 0.1 hour; put the preheated precursor into a continuous rotary calciner for calcination at a temperature of 1300°C, and the calcination time is 0.5 hour; The time for hygroscopic deweaving is 2 hours, the humidity is 70%, and the temperature is 400°C. After the calcined product is crushed by machine, it is placed in a constant temperature and constant humidity moisture absorption hydrolysis kiln for hygroscopic hydrolysis treatment to obtain potassium dititanate; the potassium dititanate is neutralized by a quantitative pickling device to complete the quantitative determination of potassium ions Transform, filter an...

Embodiment 3

[0032] Weigh titanium source titanium dioxide and potassium source potassium carbonate in a molar ratio of 1:4, mechanically grind until the system is uniform, and obtain the precursor required for the preparation of whiskers; place the above precursor in a crucible at 300°C, preheat The time is 3 hours; the preheated precursor is put into a continuous rotary calcination kiln for calcination, the temperature is 800°C, and the calcination time is 5 hours; after high-temperature sintering, after high-temperature calcination, machine crushing, moisture absorption and dewoven The time is 4 hours, the humidity is 90%, and the temperature is 300°C. After the calcined product is crushed by machine, it is placed in a constant temperature and constant humidity moisture absorption hydrolysis kiln for hygroscopic hydrolysis treatment to obtain potassium dititanate; the potassium dititanate is neutralized by a quantitative pickling device to complete the quantitative determination of potas...

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Abstract

The invention discloses a high-efficiency and energy-saving potassium titanate whisker preparation method, which comprises: firstly, mixing and grinding a titanium raw material and a potassium raw material, and preheating; and secondly, calcining, crushing, absorbing and desorbing moisture, converting potassium ions, forming and obtaining pure white potassium titanate whiskers. In the invention, potassium dititanate is crushed by a machine, the moisture absorption and desorption speed is improved, and the production efficiency is improved considerably; through heat recycling, the energy consumption is reduced greatly; heat generated in a high-temperature area is used in a preheating kiln and a constant-temperature moisture absorption and desorption kiln, the structural integrity of the crystals and the utilization rate of raw materials are improved, and the high-efficiency and energy-saving preparation of potassium titanate whisker is realized; and a quantitative injection mode is used to realize the quantitative digestion conversion of the potassium ions, so the effective control of different whiskers is realized and the obtained whisker products have complete crystal structure and contain white crystals with flaky, lamellar or needle-like shapes. The product can be widely used in fields of thermal insulation, reinforcement, corrosion prevention, toughening and the like.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a method for preparing high-efficiency and energy-saving potassium titanate whiskers. Background technique [0002] Potassium titanate series whiskers are a new class of functional materials with excellent mechanical and physical properties: high strength, high modulus, wear resistance, high temperature resistance, heat insulation, high electrical insulation and excellent infrared reflection performance. In particular, the microscopic filling and reinforcing properties of the whiskers are particularly good, which can be used to develop various new high-level lightweight, high specific strength, wear-resistant reinforced plastic composite materials, which have excellent physical, mechanical and chemical properties. It is one of the functional materials with great development value in the 21st century. [0003] Potassium titanate whiskers have excellent mechanical an...

Claims

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Application Information

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IPC IPC(8): C30B29/32C30B7/14
Inventor 马玉馨刘金库殷俊林王辉徐晓栋
Owner 马玉馨
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