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Controllable preparation method of one-dimensional high-performance BaTiO3/SrTiO3 nano composite mesocrystals

A composite mesoscopic and complex technology, applied in the direction of crystal growth, nanotechnology, chemical instruments and methods, etc., can solve the problems of lead-free piezoelectric materials that need further breakthroughs, and achieve the effect of low price and strong adsorption force

Active Publication Date: 2019-05-31
BAOJI UNIV OF ARTS & SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance of titanate series lead-free piezoelectric materials still needs further breakthroughs.

Method used

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  • Controllable preparation method of one-dimensional high-performance BaTiO3/SrTiO3 nano composite mesocrystals
  • Controllable preparation method of one-dimensional high-performance BaTiO3/SrTiO3 nano composite mesocrystals
  • Controllable preparation method of one-dimensional high-performance BaTiO3/SrTiO3 nano composite mesocrystals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: One-dimensional BaTiO 3 / SrTiO 3 Study on Reaction Conditions of Complex Mesoscopic Crystals

[0031] Weigh 0.25g titanic acid single crystal (H 2 Ti 4 o 9 ), weigh and weigh barium hydroxide (Ba(OH) 2 ·8H 2 (O) 0.5316g, add in 50mL polytetrafluoroethylene reactor, add 30mL water, after mixing evenly, react in homogeneous reactor at 100, 120, 150, 200°C for 12h respectively. H before reaction 2 Ti 4 o 9 The phase composition of figure 2 a, when the reaction was carried out at 100 °C, the XRD pattern of the product showed an amorphous form ( figure 2 b), when the reaction is carried out at 120, 150, and 200°C, the phase composition of the product contains both H 2 Ti 4 o 9 phase, also containing BaTiO 3 Mutually( figure 2 c-e). Therefore select the product that obtains under the condition of 120,150,200 to carry out next step reaction as intermediate product, be recorded as 0.6BT-120 respectively, 0.6BT-150, 0.6BT-200. In order to obtain a ...

Embodiment 2

[0036] Example 2: BaTiO 3 / SrTiO 3 Preparation of Nanocomposite Mesoscopic Crystal 0.8BT-0.1ST-200-200

[0037] Weigh 0.0500g titanic acid single crystal (H 2 Ti 4 o 9 ), weigh barium hydroxide (Ba(OH) 2 ·8H 2(0) 0.1236g, add in 50mL polytetrafluoroethylene reactor, add 30mL water, after mixing uniformly, react in homogeneous reactor at 200 ℃ for 12h. After the reaction, the product was filtered with suction, soaked in 0.5 mol / L acetic acid (HAc) solution for 24 hours, filtered with suction, washed with a large amount of water, and dried in a blast drying oven at 50°C. Weigh 0.05g of the above dry product, put it into a 50mL polytetrafluoroethylene reactor, add 30mL of 0.1mol / L strontium hydroxide aqueous solution and mix well, and react in a homogeneous reactor at 200°C for 12h. After the reaction, the product was suction filtered, soaked in 0.5 mol / L acetic acid (HAc) solution for 24 hours, suction filtered and washed with a large amount of water, and dried in a force...

Embodiment 3

[0039] Example 3: BaTiO 3 / SrTiO 3 Preparation of Nanocomposite Mesoscopic Crystal 0.6BT-0.1ST-200-150

[0040] Weigh 0.0500g titanic acid single crystal (H 2 Ti 4 o 9 ), weigh barium hydroxide (Ba(OH) 2 ·8H 2 (0) 0.1063g, add in 50mL polytetrafluoroethylene reactor, add 30mL water, after mixing evenly, react in homogeneous reactor at 200 ℃ for 12h. After the reaction, the product was filtered with suction, soaked in 0.5 mol / L acetic acid (HAc) solution for 24 hours, filtered with suction, washed with a large amount of water, and dried in a blast drying oven at 50°C. Weigh 0.05g of the above dry product, add it into a 50mL polytetrafluoroethylene reactor, add 30mL 0.1mol / L strontium hydroxide aqueous solution and mix well, and react in a homogeneous reactor at 150°C for 12h. After the reaction, the product was suction filtered, soaked in 0.5 mol / L acetic acid (HAc) solution for 24 hours, suction filtered and washed with a large amount of water, and dried in a forced air...

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Abstract

The invention relates to a controllable preparation method of high-performance one-dimensional BaTiO3 / SrTiO3 nano composite mesocrystals. According to the method, tetratitanic acid is used as a template, alkaline earth metal oxide and hydroxide are used as raw materials, and the BaTiO3 / SrTiO3 nano composite mesocrystals with different ratios can be prepared under control by adopting a two-step hydrothermal method. A preparation process has high controllability, and nanocomposites with different ratios can be prepared according to application requirements. BaTiO3 / SrTiO3 prepared by the method is a one-dimensional nanocomposite mesocrystal, has a regular rod shape, and has the maximum piezoelectric property 253 times higher than that of one-dimensional BaTiO3 monomers. In addition, the template and the reactants used in the preparation process and the waste liquid generated by a prepared product do not harm the environment and the human bodies, and can be applied to the aspects of layercapacitors, thermistors, photoelectric equipment, electromechanical equipment, sensors, dynamic random access memories, field effect transistors, other miniature devices and the like.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite materials, in particular, relates to a controllable preparation of high-performance one-dimensional BaTiO 3 / SrTiO 3 A method for nanocomposite mesoscopic crystals. Background technique [0002] As an important part of the microelectronics field, piezoelectric materials play an important role in modern industry. In order to meet the needs of modern industry, piezoelectric materials are developing in the direction of miniaturization, integration and lead-free. Therefore, lead-free piezoelectric materials have become materials that can meet environmental protection requirements and piezoelectric performance. Perovskite structure, black bronze structure, and bismuth layered structure have become the main structures for combining lead-free piezoelectric materials. However, as BaTiO 3 (BT), Sr 1-x Ba x Nb 2 o 6 and Bi 4 Ti 3 o 12 The single-component piezoelectric material powders com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B7/10C30B29/32C30B29/60B82Y40/00
Inventor 胡登卫苗磊张珍李立杰姚明刚刘杰荆飞张瑞晨赵立芳凡明锦
Owner BAOJI UNIV OF ARTS & SCI
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