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A kind of uranyl cadmium malonate monohydrate ferroelectric functional material and preparation method thereof

A technology of uranyl cadmium iron malonate monohydrate and uranyl cadmium iron malonate hydrate, which is applied in the field of uranyl cadmium malonate monohydrate ferroelectric functional materials and its preparation, can solve the problems of limited research results, Achieve the effects of low equipment requirements, simple and easy process, and high yield

Active Publication Date: 2019-10-22
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Judging from the current research status, the research, development and application of ferroelectric materials with high performance are still in the development stage, and they are concentrated on inorganic compound ferroelectric materials. Therefore, to explore and develop new ferroelectric materials and continuously develop their preparation processes, It is still one of the directions that material workers are constantly working on, while the research on metal-organic complex ferroelectric materials is in its infancy, and the research results are relatively limited.

Method used

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  • A kind of uranyl cadmium malonate monohydrate ferroelectric functional material and preparation method thereof
  • A kind of uranyl cadmium malonate monohydrate ferroelectric functional material and preparation method thereof
  • A kind of uranyl cadmium malonate monohydrate ferroelectric functional material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take 0.105g (1mmol) of malonic acid and 0.126g (0.8mmol) of 4,4'-bipyridine and dissolve them in a solvent of 10mL of water and 5mL of ethanol respectively to prepare a solution of malonic acid and 4,4'-bipyridine . Under stirring, slowly add the 4,4'-bipyridine ethanol solution dropwise into the malonic acid solution, weigh 0.250g (0.5mmol) uranyl nitrate, add the yellow solid uranyl nitrate to the stirring In the above solution, until it is completely dissolved, the solution turns yellow. Another 0.104g (0.5mmol) of cadmium sulfate was weighed and added to the above solution under stirring until it was completely dissolved. The measured pH of the solution was 2.85. After the clear yellow solution was left standing at room temperature for several days, yellow blocky crystals precipitated out of the solution. After the crystal is ground and passed through a 100-mesh sieve, and analyzed by powder X-ray diffraction crystal phase, a yellow uranyl cadmium malonate monohy...

Embodiment 2

[0022] Take 0.153g (1.5mmol) of malonic acid and 0.157g (1mmol) of 4,4'-bipyridine and dissolve them in a solvent of 10mL of water and 10mL of ethanol respectively to prepare a solution of malonic acid and 4,4'-bipyridine . Slowly add 4,4'-bipyridine ethanol solution dropwise into the malonic acid solution under stirring, and weigh 0.250g (0.5mmol) uranyl nitrate and 0.104g (0.5mmol) cadmium sulfate respectively In the above solution, until it is completely dissolved, a yellow clear solution is formed, and the measured pH value of the solution is 2.44. The yellow clear solution was left to stand in an oven at about 40 degrees for 2-3 days to obtain yellow blocky crystals.

Embodiment 3

[0024] It is basically the same as in Example 1, except that 0.250 g (0.5 mmol) of uranyl nitrate is replaced by 0.121 g (0.5 mmol) of uranyl acetate.

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Abstract

The invention discloses a uranyl cadmium malonate monohydrate ferroelectric functional material, and different preparation methods of powders and crystals of the ferroelectric functional material. Theferroelectric functional material has the formula of [(UO2)Cd(bipy)L2].H2O, wherein bipy is a 4,4'-bipyridyl molecule, and L is a malonate anion. The ferroelectric functional material is a yellow powder capable of passing through a 100-mesh sieve and has a purity not Less than 99%, belongs to a monoclinic system, has a Cc space group structure, and the crystal cell parameters of a crystal of theferroelectric functional material are: a=15.671(3) angstroms, b=17.411(4) angstroms, c=7.554(2) angstroms, alpha=90 DEG, beta=111.44(3) DEG, gamma=90 DEG, and the ferroelectric characteristic parameters are: 2Pr=0.820 [mu]C*cm<-2>, 2Ec=9.570 kV*cm<-1>, and Ps=0.435 [mu]C*cm<-2>. The preparation method of the ferroelectric functional material of the invention has the advantages of simple and feasible process, low requirements on equipment, high yield and the like.

Description

technical field [0001] The invention relates to a ferroelectric functional material, in particular to a uranyl cadmium malonate monohydrate ferroelectric functional material and a preparation method thereof. Background technique [0002] Ferroelectric materials are an important class of functional materials, which have important properties such as dielectricity, piezoelectricity, pyroelectricity, ferroelectricity, electro-optic effect, acousto-optic effect, photorefractive effect and nonlinear optical effect. It can be used to make important new components such as ferroelectric memories, pyroelectric infrared detectors, spatial light modulators, optical waveguides, dielectric phase shifters, and voltage-controlled filters. These components have broad application prospects in aerospace, communications, home appliances, national defense and other fields, so ferroelectric materials have become one of the frontiers and hotspots of high-tech research in recent years. [0003] It...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F5/00
Inventor 任亚男许伟郑岳青朱红林
Owner NINGBO UNIV