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Method using ion exchange solvothermal method for preparation of titanate nano powder

A technology of nano-powder and solvothermal method, which is applied in the production of chemical instruments and methods, titanium compounds, and bulk chemicals. Simple operation effect

Active Publication Date: 2014-05-28
临沂创实新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the traditional hydrothermal method is difficult to achieve ion exchange, for the use of K 2 Ti 6 o 13 Precursors for ion preparation of BaTiO 3 The method of nanopowder has been rarely reported so far

Method used

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  • Method using ion exchange solvothermal method for preparation of titanate nano powder
  • Method using ion exchange solvothermal method for preparation of titanate nano powder

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Experimental program
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Effect test

Embodiment 1

[0025] This embodiment provides a kind of nano functional material, the precursor of synthesis is K 2 Ti 6 o 13 Nano whiskers, the resulting final product has the molecular formula BaTiO 3 , the preparation method comprises the following steps:

[0026] Step 1: According to TiO 2 / K 2 Weigh K in proportion to O=3 2 CO 3 and TiO 2 , carry out ball milling or add alcohol magnetic stirring for a period of time, and then dry; place the dried mixture in a muffle furnace, rapidly raise the temperature to 1150°C at a heating rate of 10°C / min, keep it warm for 1h for calcination, and quickly from Take it out of the muffle furnace for rapid cooling;

[0027] Step 2: Extract the product obtained in Step 1 in boiling water for 2 hours to remove residual K 2 O and other residues, the obtained powder was dried at 60°C for 24 hours to obtain K 2 Ti 6 o 13 nano whiskers;

[0028] Step 3: Configure 0.2M Ba(OH) 2 solution, and the K obtained in step two 2 Ti 6 o 13 Precursors ...

Embodiment 2

[0031] Step 1: According to TiO 2 / K 2 Weigh K in proportion to O=3 2 CO 3 and TiO 2 , carry out ball milling or add alcohol magnetic stirring for a period of time, and then dry; place the dried mixture in a muffle furnace, rapidly raise the temperature to 860°C at a heating rate of 10°C / min, keep it warm for 1h for calcination, and reach the holding time Later, quickly removed from the muffle furnace and rapidly cooled;

[0032] Step 2: Extract the product obtained in Step 1 in boiling water for 2 hours to remove residual K 2 O and other residues. Dry the obtained powder at 60°C for 24 hours to obtain K 2 Ti 4 o 9 nano whiskers;

[0033] Step 3: Configure 0.8M Ba(OH) 2 solution, and the K obtained in step two 2 Ti 4 o 9 Precursors and configured Ba(OH) 2 Solution, stir evenly, and add a certain amount of organic solvents such as isopropanol, continue stirring for a period of time, and transfer to the polytetrafluoroethylene lining. The reaction temperature is 2...

Embodiment 3

[0036] Step 1: According to TiO 2 / K 2 Weigh K in proportion to O=3 2 CO 3 and TiO 2 , carry out ball milling or add alcohol magnetic stirring for a period of time, and then dry; place the dried mixture in a muffle furnace, rapidly raise the temperature to 860°C at a heating rate of 15°C / min, keep it warm for 1h and carry out calcination to reach the holding time Later, quickly removed from the muffle furnace and rapidly cooled;

[0037] Step 2: Extract the product obtained in Step 1 in boiling water for 2 hours to remove residual K 2 O and other residues. Dry the obtained powder at 60°C for 24 hours to obtain K 2 Ti 4 o 9 nano whiskers;

[0038] Step 3: Configure 0.8M Sr(OH) 2 solution, and the K obtained in step two 2 Ti 4 o 9 Precursors and configured Sr(OH) 2 Solution, stir evenly, and add a certain amount of organic solvents such as isopropanol, continue stirring for a period of time, and transfer to the polytetrafluoroethylene lining. The reaction temperat...

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Abstract

The invention discloses a method using an ion exchange solvothermalmethod for preparation of titanate nano powde, the method comprises raw material weighing, mixing and drying, heating, boiling water extraction, precursor preparation and solvothermal reaction steps. The method of the invention is the ion exchange solvothermal method, the synthesized nano powder is in fact the nano titanate powder, when temperature and pressure are over supercritical points of an organic solvent liquid, the liquid is in a supercritical state, the solubility of compounds in the liquid as a solvent is increased, the viscosity is decreased, and the ion activity is enhanced. By the method, nano strontium titanate, calcium titanate, barium titanate and the like can be synthesized in more temperate conditions, the method has the advantages of being simple in operation step, easy to implement, mild in reaction condition, and convenient in industrial production.

Description

technical field [0001] The invention relates to a method for preparing titanate nano-powder, in particular to a method for preparing perovskite-type nano-powder by an ion-exchange solvothermal method, and at the same time relates to a novel synthetic method for synthesizing inorganic materials by an ion-exchange solvothermal method. [0002] Background technique [0003] Barium titanate (BaTiO 3 ) materials are an important class of perovskite structure materials, which have a wide range of applications in ferroelectric, piezoelectric, high dielectric materials and photorefractive materials, used for such as non-volatile memory memory, sensors, gate dielectric Electrical layer, nonlinear optics and other devices. BaTiO 3 Nanomaterials have properties dependent on their unique size and shape due to their low-dimensional dimensions. Therefore, in order to realize the application of new nanotechnology, people try to use various methods to prepare nanostructured materials wi...

Claims

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Application Information

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IPC IPC(8): C01G23/00
CPCY02P20/54
Inventor 朱孔军曹洋
Owner 临沂创实新型材料有限公司
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