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Preparation method of Bi12TiO20 powder

A powder and precursor liquid technology, applied in chemical instruments and methods, inorganic chemistry, bismuth compounds, etc., can solve the problems of easy powder agglomeration and difficult shape control, and achieve good dispersion, regular shape, and process methods simple effect

Inactive Publication Date: 2015-05-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these two methods require high-temperature calcination, and the obtained powder is easy to agglomerate, and the shape is difficult to control

Method used

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  • Preparation method of Bi12TiO20 powder
  • Preparation method of Bi12TiO20 powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A Bi 12 TiO 20 The preparation method of powder, comprises the steps:

[0018] Step 1: Add NaOH to deionized water, stir until dissolved, and the concentration of NaOH is 1.0mol / L;

[0019] Step 2: Weigh Bi(NO 3 ) 3 ·5H 2 O and TiO 2 , and added to the NaOH solution, stirred for 0.5h to obtain a uniformly mixed precursor solution, in the precursor solution, the total concentration of Bi and Ti ions was 0.01mol / L;

[0020] Step 3: Transfer the precursor liquid into the microwave reactor, and the volume of the precursor liquid is controlled at 50% of the volume of the microwave reactor;

[0021] Step 4: Put the microwave reactor into the microwave hydrothermal reaction equipment, let the precursor solution react at 150°C for 120min;

[0022] Step 5: After the reaction is finished and cooled, take out the reaction kettle, wash the obtained product with distilled water to neutrality and then wash it once with absolute ethanol, and finally dry it in an oven to obtain ...

Embodiment 2

[0024] A Bi 12 TiO 20 The preparation method of powder, comprises the steps:

[0025] Step 1: Add NaOH to deionized water, stir until dissolved, and the concentration of NaOH is 3.0mol / L;

[0026] Step 2: Weigh Bi(NO 3 ) 3 ·5H 2 O and TiO 2 , and added to the NaOH solution, stirred for 1 hour to obtain a uniformly mixed precursor solution, in the precursor solution, the total concentration of Bi and Ti ions was 0.10mol / L;

[0027] Step 3: Transfer the precursor liquid into the microwave reactor, and the volume of the precursor liquid is controlled at 70% of the volume of the microwave reactor;

[0028] Step 4: Put the microwave reactor into the microwave hydrothermal reaction equipment, let the precursor solution react at 220°C for 30 minutes;

[0029] Step 5: After the reaction is finished and cooled, take out the reaction kettle, wash the obtained product with distilled water to neutrality and then wash it once with absolute ethanol, and finally dry it in an oven to o...

Embodiment 3

[0031] A Bi 12 TiO 20 The preparation method of powder, comprises the steps:

[0032] Step 1: Add NaOH to deionized water, stir until dissolved, and the concentration of NaOH is 2.0mol / L;

[0033] Step 2: Weigh Bi(NO 3 ) 3 ·5H 2 O and TiO 2 , and added to the NaOH solution, stirred for 0.8h to obtain a uniformly mixed precursor solution, in the precursor solution, the total concentration of Bi and Ti ions was 0.06mol / L;

[0034] Step 3: Transfer the precursor liquid into the microwave reactor, and the volume of the precursor liquid is controlled at 60% of the volume of the microwave reactor;

[0035] Step 4: Put the microwave reactor into the microwave hydrothermal reaction equipment, and let the precursor solution react at 180°C for 80 minutes;

[0036] Step 5: After the reaction is finished and cooled, take out the reaction kettle, wash the obtained product with distilled water to neutrality and then wash it once with absolute ethanol, and finally dry it in an oven to...

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Abstract

The invention relates to a preparation method of Bi12TiO20 powder. The preparation method comprises the following steps of: adding NaOH into deionized water and stirring till dissolution; respectively weighing Bi(NO3)3.5H2O and TiO2 according to the Bi / Ti ion molar ratio of 12: 1, adding into a NaOH solution and stirring to obtain a precursor solution which is uniformly mixed; transferring the precursor solution into a microwave reaction kettle; placing the microwave reaction kettle into a microwave hydrothermal reaction device for reacting; and cooling after the end of reaction, taking out of the reaction kettle, firstly washing an obtained product with distilled water to be neutral, then washing with anhydrous ethanol, and finally drying in an oven to obtain the Bi12TiO20 powder. According to the preparation method disclosed by the invention, a microwave hydrothermal method is adopted for preparing the Bi12TiO20 powder, the adopted process is simple, the efficiency is high, and the obtained powder has the advantages of complete development of crystal phase, high purity, regular grain morphology and uniform size.

Description

technical field [0001] The invention belongs to the field of functional materials, in particular to a Bi 12 TiO 20 Powder preparation method. Background technique [0002] Bi 12 TiO 20 It is one of many oxides in the bismuth titanate series. Its crystal structure is the 123 point group of the cubic system, and the unit cell is composed of [TiO 4 ] tetrahedra and [BiO 5 ] Polyhedron composed of two structural units. Bi 12 TiO 20 It has the advantages of small optical rotation, large linear electro-optic coefficient, and high sensitivity in the red light region. It belongs to broadband semiconductors. It also has photoelectric, electro-optic, fluorescent, magneto-optical, acousto-optic, optical rotation and piezoelectric properties. In particular, its excellent photoelectric and electro-optical properties make it have a very broad application prospect in the fields of optoelectronics, optics, and optical information processing materials. The unique crystal structure a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G29/00
Inventor 夏傲谈国强
Owner SHAANXI UNIV OF SCI & TECH