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Method for preparing indium niobium co-doped titanium dioxide powder through co-precipitation method

A technology of titanium dioxide and co-precipitation method, which is applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problem of difficult uniformity of solid-phase doping, easy agglomeration of powder, and impossibility to achieve complete uniformity, etc. problems, to achieve precise control of chemical composition, narrow powder particle size distribution, and large-scale production

Active Publication Date: 2017-06-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] (1) The solid-state reaction generally needs to be carried out at a higher temperature, which wastes energy, and the fusion and growth of particles will also occur, which is not conducive to the formation of ultrafine powder;
[0010] (2) Since the solid phase reaction is carried out on the particle interface, the reaction is often incomplete and the composition is not uniform;
[0011] (3) Solid-phase doping is difficult to be uniform, especially when a small amount of doping (0.1% to 1%), it is impossible to achieve complete uniformity;
[0012] (4) The traditional solid-phase method is easy to introduce other impurities, resulting in very low purity of the obtained powder;
[0013] (5) The powder produced by solid state reaction is prone to agglomeration

Method used

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  • Method for preparing indium niobium co-doped titanium dioxide powder through co-precipitation method
  • Method for preparing indium niobium co-doped titanium dioxide powder through co-precipitation method

Examples

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Embodiment 1

[0036] A method for preparing indium-niobium co-doped titanium dioxide powder by co-precipitation, comprising the steps of:

[0037] (1) Configure the solution, and accurately weigh InCl according to the molar ratio of 1:1 3 4H 2 O and NbCl 5 , and respectively dissolved in absolute ethanol, the concentration of which is 0.06~0.08mol / L;

[0038] (2) Measure TiCl at a volume ratio of 1:6 4 , dissolved in absolute ethanol to obtain TiCl 4 Anhydrous ethanol solution;

[0039] (3) InCl prepared in step (1) 3 solution to NbCl 5 Slowly add dropwise to the solution at a rate of 1mL / min;

[0040] (4) TiCl prepared in step (2) 4 The dehydrated ethanol solution was dripped into the mixed solution A prepared in step (3) at a rate of 1 mL / min to prepare the mixed solution B, and stirred for 1 h after the dripping was completed;

[0041] (5) The solution prepared in step (4) was adjusted to pH=11 with ammonia water having a mass concentration of 25% to 28%, and the ammonia water d...

Embodiment 2

[0045] A method for preparing indium-niobium co-doped titanium dioxide powder by co-precipitation, comprising the steps of:

[0046] (1) Configure the solution and accurately weigh InCl according to the molar ratio of 1:3 3 4H 2 O, and NbCl 5 , and were respectively dissolved in absolute ethanol, the concentration of which was 0.07mol / L;

[0047] (2) Measure TiCl at a volume ratio of 1:7 4 , dissolved in absolute ethanol to obtain TiCl 4 Anhydrous ethanol solution;

[0048] (3) InCl prepared in step (1) 3 solution to NbCl 5 Add slowly to the solution at a rate of 1.5mL / min;

[0049] (4) TiCl prepared in step (2) 4The dehydrated ethanol solution is dripped into the mixed solution A prepared in step (3) at a rate of 1.5mL / min to prepare the mixed solution B, and it needs to be stirred for 0.5h after the dripping is completed;

[0050] (5) Adjust the pH of the solution prepared in step (4) to 11 using ammonia water with a mass concentration of 25% to 28%, and the drippin...

Embodiment 3

[0054] A method for preparing indium-niobium co-doped titanium dioxide nanopowder by co-precipitation method comprises the following steps:

[0055] (1) To configure the solution, accurately weigh InCl according to the molar ratio of 1:1 to 1:3 3 4H 2 O and NbCl 5 , and respectively dissolved in absolute ethanol, the concentration of which is 0.08mol / L;

[0056] (2) Measure TiCl at a volume ratio of 1:8 4 , dissolved in absolute ethanol to obtain TiCl 4 Anhydrous ethanol solution;

[0057] (3) InCl prepared in step (1) 3 solution to NbCl 5 Add slowly to the solution at a rate of 2mL / min;

[0058] (4) TiCl prepared in step (2) 4 The dehydrated ethanol solution was dripped into the mixed solution A prepared in step (3) at a rate of 2mL / min to prepare the mixed solution B, and stirred for 1h after the dripping was completed;

[0059] (5) The solution prepared in step (4) was adjusted to pH=11 with ammonia water having a mass concentration of 25% to 28%, and the ammonia w...

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Abstract

The invention relates to a method for preparing indium niobium co-doped titanium dioxide powder through a co-precipitation method. The method comprises the following steps: (1) preparing a solution, weighting InCl3.4H2O and NbCl and respectively dissolving in absolute ethyl alcohol, thereby obtaining an InCl3 solution and a NbCl5 solution; (2) weighting TiCl4 and dissolving in absolute ethyl alcohol, thereby obtaining a TiCl4 absolute ethyl alcohol solution; (3) dropwise adding the InCl3 solution into the NbCl5 solution, thereby obtaining a mixed solution A; (4) dropwise adding the TiCl4 absolute ethyl alcohol solution into the mixed solution A, thereby obtaining a mixed solution B; (5) using ammonium hydroxide for adjusting pH of the mixed solution B till pH is more than or equal to 11, thereby forming a suspension; (6) performing suction filtration on the suspension, drying the obtained precipitate, grinding and sieving, thereby obtaining precursor powder; (7) roasting the precursor powder prepared in the step (6) at 1100-1200 DEG C, thereby obtaining the indium niobium co-doped titanium dioxide powder.

Description

technical field [0001] The invention belongs to the technical field of powder preparation by wet chemical method, in particular to a method for preparing indium niobium co-doped titanium dioxide powder by co-precipitation method. Background technique [0002] In recent years, modern communication technology, Internet, local area network and microelectronic technology have been continuously developed, and electronic technology has been widely used in national defense, science, industry, medicine, communication (information processing, transmission and communication), radio, television, aviation, navigation, radio Various fields such as positioning, automatic control, remote control and telemetry, computer and cultural life play an important role in promoting the development of the national economy. This rapid development has put forward higher requirements for the size and performance of capacitive devices such as capacitors and memories. The dielectric material is becoming t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G33/00C01G23/053
CPCC01G23/0536C01G33/00C01P2002/72C01P2004/03C01P2004/51C01P2004/61C01P2004/82
Inventor 王卓李银博赵玥徐丹杨晓倩田一冲
Owner SHAANXI UNIV OF SCI & TECH
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