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 d

Method used

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

Examples

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Example Embodiment

[0027] Example 1

[0028] After weighing the titanium dioxide source and potassium source potassium oxide at a molar ratio of 1:1, mechanically grind until the system is uniform to obtain the precursor required for preparing the whiskers; place the precursor in the crucible at 35°C, and preheat The time is 5 hours; the preheated precursor is calcined in a continuous rotary calcining kiln at a temperature of 800℃, and the calcination time is 5 hours; after high-temperature calcination, it is crushed by a machine and placed at a humidity of 100% and a temperature of 100℃ In the moisture absorption deweaving kiln for 24 hours, potassium dititanate is obtained; 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 ...

Example Embodiment

[0029] Example 2

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

Example Embodiment

[0031] Example 3

[0032] After weighing the titanium dioxide source and potassium source potassium carbonate at a molar ratio of 1:4, mechanically grind until the system is uniform to obtain the precursor required for preparing whiskers; place the precursor in a crucible at 300°C and preheat The time is 3 hours; the preheated precursor is calcined in a continuous rotary calcining kiln at a temperature of 800℃, and the calcining time is 5 hours; after high-temperature sintering and high-temperature calcination, the machine crushes, absorbs moisture, deweaves, and absorbs moisture. The time is 4 hours, the humidity is 90%, and the temperature is 300°C. After the calcined product is crushed by a machine, it is put into a constant temperature and humidity hygroscopic hydrolysis kiln for hygroscopic hydrolysis to obtain potassium dititanate; the potassium dititanate is neutralized by a quantitative pickling device to complete the quantification of potassium ions After conversion, fi...

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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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