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Nano functional ceramic material and preparation method thereof

A ceramic material and nano-functional technology, applied in the field of preparing the nano-functional ceramic material, can solve problems such as inapplicability, and achieve the effects of easy realization, mild synthesis conditions and uniform grain size distribution

Inactive Publication Date: 2011-09-14
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the hydrothermal method also has serious limitations. The most obvious disadvantage is that this method is often only suitable for the preparation of oxides or a small number of sulfides that are not sensitive to water, but not applicable to other water-sensitive compounds.

Method used

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  • Nano functional ceramic material and preparation method thereof
  • Nano functional ceramic material and preparation method thereof

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Embodiment 1

[0020] This embodiment provides a nano-functional ceramic material whose molecular formula is A(Nb x Ta 1-x )O 3 , where A is an alkali metal, x=0~1, and the alkali metal is lithium, sodium, potassium, rubidium or cesium.

Embodiment 2

[0022] The present embodiment provides a method for preparing a nano piezoelectric ceramic material, comprising the following steps:

[0023] Step 1: prepare an isopropanol solution of alkali metal hydroxide, the concentration of the solution is 0.5M; the alkali metal is one of lithium, sodium, potassium, rubidium or cesium.

[0024] Step 2: According to the filling degree of the hydrothermal reaction kettle, measure the isopropanol solution of the alkali metal hydroxide obtained in step 1, add it to the polytetrafluoroethylene lining of the reaction kettle and stir, and the hydrothermal reaction The filling degree of the kettle is 20%;

[0025] Step 3: According to the components in the molecular formula of the nano-functional ceramic material, weigh the niobium pentoxide and tantalum pentoxide powders, and add the alkali metal hydroxides to the PTFE lining in the stirring described in step 3. Propanol solution, and stir for 30 minutes; if the nano-functional ceramic materia...

Embodiment 3

[0029] The present embodiment provides a preparation method of a nanometer functional ceramic material, comprising the following steps:

[0030]Step 1: prepare an isopropanol solution of alkali metal hydroxide, the concentration of the solution is 5M; the alkali metal is one of lithium, sodium, potassium, rubidium or cesium.

[0031] Step 2: According to the filling degree of the hydrothermal reaction kettle, measure the isopropanol solution of the alkali metal hydroxide obtained in step 1, add it to the polytetrafluoroethylene lining of the reaction kettle and stir, and the hydrothermal reaction The filling degree of the kettle is 80%;

[0032] Step 3: According to the components in the molecular formula of the nano-functional ceramic material, weigh the niobium pentoxide and tantalum pentoxide powders, and add the alkali metal hydroxides to the PTFE lining in the stirring described in step 3. Propanol solution, and stirred for 60 minutes;

[0033] Step 4: put the polytetra...

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Abstract

The invention provides a nano functional ceramic material, and in particular relates to a nano functional ceramic material with an ABO3 perovskite structure and a method for preparing the material. The method comprises the following steps: preparing an organic solvent solution of alkali metal hydroxide; adding the weighed organic solvent solution in a polytetrafluoroethylene lining of a reaction kettle, and stirring; adding weighed niobium pentaoxide powder and tantalum pentoxide powder in the polytetrafluoroethylene lining according to the chemical dose proportion of a ceramic material molecular formula and the concentration and volume of an organic solvent, and then continuing to stir; putting the polytetrafluoroethylene lining in a stainless steel hydro-thermal reaction kettle for a solvent heat reaction so as to obtain a precipitate; and processing the obtained precipitate so as to obtain A(NbxTa1-x)O3 nano powder. In the method, the characteristics of the organic solvent are fully utilized, the ceramic powder is synthesized under the milder conditions; the powder has the advantages of good dispersibility and uniformly distributed crystallite dimension; the steps are simple and easy to operate and achieve; and the synthesis conditions are mild, thus being convenient for industrial production.

Description

a technical field [0001] The invention relates to a nanometer functional ceramic material, in particular to a 3 The invention relates to a nano-functional ceramic material of perovskite structure, and also relates to a method for preparing the nano-functional ceramic material. Two background technology [0002] Due to their superior ferroelectric, piezoelectric, electromechanical and nonlinear optical properties, alkali metal niobates have attracted great interest in today's scientific community. Among them, potassium tantalate (KTaO 3 ), potassium niobate (KNbO 3 ) and potassium niobate tantalate (KTa 1-x Nb x O 3 ) (KT-KN-KTN) family of materials has excellent ferroelectric and piezoelectric properties. In addition, it is found that it has electro-optic effect, photorefractive effect and pyroelectric effect, which makes this material in electro-optic modulation, Infrared detection, optical communication and optical storage show a wide range of application prospects. ...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/626
Inventor 朱孔军裘进浩顾洪汇季宏丽
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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