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Hydrate D-cerous tartrate ferroelectric functional material and preparation method thereof

A technology of tartaric acid and electric function, which is applied in the field of hydrated D-cerium tartrate ferroelectric functional material and its preparation, to achieve the effect of easy industrialization, good ferroelectric characteristics, and less process

Inactive Publication Date: 2015-02-04
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In recent years, although the various properties of ferroelectric materials have made great progress, and some of them have been applied to real life, the research, development and application of ferroelectric materials with high performance are still in the development stage.

Method used

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  • Hydrate D-cerous tartrate ferroelectric functional material and preparation method thereof
  • Hydrate D-cerous tartrate ferroelectric functional material and preparation method thereof
  • Hydrate D-cerous tartrate ferroelectric functional material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1, take by weighing 1.0mmol cerium nitrate and dissolve in deionized water, stir and dissolve, be made into the cerium nitrate solution that concentration is 0.05~0.1mol / L stand-by, take by weighing 1.5mmol D-tartaric acid, be dissolved in deionized water, Stir to dissolve, add 3.0mmol sodium hydroxide to dissolve, and make a sodium tartrate solution with a concentration of 0.05-0.1mol / L. Under stirring, add the cerium nitrate solution into the sodium tartrate solution, and a white precipitate is formed. After continuing to stir for a period of time, the precipitation is complete, filtered, and the precipitate is washed with distilled water for 3 to 5 times, and then vacuum-dried to obtain white hydrated tartaric acid. Ce powder.

Embodiment 2

[0021] Embodiment 2 is substantially the same as Embodiment 1, except that the D-tartaric acid is 1.0mmol or 2.0mmol.

Embodiment 3

[0022] Example 3. Weigh 1.0 g of cerium oxide and 1.5 g of D-tartaric acid and dissolve them in 40 to 50 mL of ethanol solution with a volume concentration of 85 to 90%, then place them in a polytetrafluoroethylene-lined stainless steel reaction kettle, stir well After dissolving, add oxalic acid to adjust the pH of the solution to 0.3-0.5, seal the stainless steel reactor, and react for 2-5 days at a temperature of 120-200°C. After the reaction is completed, reduce the temperature by 2-5°C per hour. cooling to room temperature to obtain colorless flaky cerium tartrate hydrate crystals; grinding the cerium tartrate hydrate crystals into a powder passing through a 100-mesh sieve to obtain white cerium tartrate hydrate powder.

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Abstract

The invention discloses a hydrate D-cerous tartrate ferroelectric functional material and a preparation method thereof. The ferroelectric functional material has a molecular formula of [Ce2(H2O)]3(D-C4HO6)3].3H2O, is triclinic white powder with the purity of not lower than 99% and is a C1 polar point group structure; the ferroelectric characteristic parameters are as follows: the remanent polarization 2Pr=0.019 micro C.cm<-2>, the coercive electric field 2Ec=1.139kv.cm<-2>, and the saturated polarization intensity Ps=0.233 micro C.cm<-2>; the powder lattice parameters are shown in the specification; the polarizability value of the ferroelectric functional material is similar to that of a common ferroelectric rochelle salt; and the ferroelectric functional material has excellent ferroelectric characteristics. The preparation method has the advantages of less flow, simplicity in process, low requirement on equipment, no pollution, low cost and easiness for industrialization.

Description

technical field [0001] The invention relates to a ferroelectric functional material, in particular to a hydrated D-cerium tartrate ferroelectric functional material and a preparation method thereof. Background technique [0002] Ferroelectric materials refer to a class of materials with ferroelectric effect. It is a branch of pyroelectric materials, which means that they have spontaneous polarization when no external electric field is applied, and the direction of spontaneous polarization can be reversed by an external electric field. A class of functional materials that turn or redirect. Ferroelectric materials have multiple coupling properties such as ferroelectricity, ferroelasticity, pyroelectricity, piezoelectricity and inverse piezoelectricity, as well as other unique physical properties, such as force-electricity-thermal coupling properties, electroacoustic-optical Coupling properties, nonlinear optical effects, switching characteristics, etc. These properties make f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C59/255C07C51/41
Inventor 戚金丽郑岳青虞晓科许伟林建利朱红林
Owner NINGBO UNIV
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