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Anhydrous zinc tartrate ferroelectric function material and preparation method thereof

A ferroelectric functional material, zinc tartrate technology, applied in carboxylate preparation, organic chemistry, etc., can solve problems such as limiting the use temperature range of metal-organic functional complexes, and achieve improved use range, significant ferroelectric properties, ferroelectric Excellent performance

Inactive Publication Date: 2012-11-14
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the self-assembly process of metal-organic complexes, crystal water molecules or coordinated water molecules are easily formed in the complex structure, which greatly limits the use temperature range of metal-organic functional complexes.

Method used

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  • Anhydrous zinc tartrate ferroelectric function material and preparation method thereof
  • Anhydrous zinc tartrate ferroelectric function material and preparation method thereof
  • Anhydrous zinc tartrate ferroelectric function material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Weigh 0.02mol L-(+)-tartaric acid (C 4 h 6 o 6 ) was dissolved in 100mL deionized water, and prepared into a solution with a concentration of 0.2mol / L for later use; zinc nitrate (Zn(NO 3 )·6H 2 O), zinc nitrate is slowly added to the prepared L-(+)-tartaric acid solution while stirring, after stirring for 30min, zinc nitrate has also been added and fully dissolved, and the insoluble matter is removed by filtration, and the resulting filtrate is zinc tartrate solution, and then adjust the pH of the filtrate to 4.0 with 0.5mol / L ammonia solution, stir the filtrate at a constant temperature of 50°C for 3 hours, and filter with suction to obtain white powder crystals; dehydrate the crystals in an oven at 80°C for 8 hours to obtain white powder The body was ground in an agate mortar and passed through a 100-mesh sieve to obtain anhydrous zinc tartrate ferroelectric powder with ferroelectric properties.

Embodiment 2

[0028] Weigh 0.06mol tartaric acid (C 4 h 6 o 6 ) was dissolved in 100mL deionized water, and prepared into a solution with a concentration of 0.6mol / L for use. Weigh zinc nitrate (Zn(NO 3) 2 ·6H 2 (2), while stirring, zinc nitrate is slowly added to the pre-configured tartaric acid solution, stirred for 40min, zinc nitrate has also been added and fully dissolved, and the insolubles are removed by filtration, and the gained filtrate is zinc tartrate solution. Then use 1mol / L NaOH solution to adjust the pH of the filtrate to 6.0, stir the filtrate at a constant temperature of 50°C for 1h to form a white turbid liquid, cool it to room temperature and age it for 2h, then filter it with suction to obtain a white powder crystal, which is removed by filtration Insoluble matter, the resulting filtrate is zinc tartrate solution. It was dehydrated in an oven at 120°C for 6 hours to obtain a white powder, which was ground and passed through a 100-mesh sieve to obtain white [Zn(C ...

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Abstract

The invention discloses an anhydrous zinc tartrate ferroelectric function material, the molecular formula of which is Zn(C4H4O6), and the ferroelectric function material can pass through white powder with purity of no less than 99 percent of 100 meshes, the heat quantitative temperature of the white powder is 350 DEG C, parameters of the ferroelectric properties of the ferroelectric function material is respectively as follows: Ps=0.43 mu C.cm<-2>, 2Pr=0.73 mu C.cm<-2>, 2Ec=0.47 kV.cm<-1>; thereby, the anhydrous zinc tartrate ferroelectric function material has better ferroelectric properties and thermal stability; the invention also discloses a preparation method of the ferroelectric function material, which can realize the nucleus formation and growth processes of the prophase product of the anhydrous zinc tartrate through controlling the concentration and proportion of the materials, the adding speed of the reactants, the stirring time, the temperature of the reaction system, pH control of the solution and the like, in addition, dehydration treatment is then carried out, and anhydrous zinc tartrate ferroelectric power with higher purity and good performance can be obtained.

Description

technical field [0001] The invention relates to ferroelectric functional materials, in particular to anhydrous zinc tartrate ferroelectric functional materials and a preparation method thereof. Background technique [0002] Ferroelectric functional materials (ferroelectrics) refer to a class of functional materials whose crystal structure has spontaneous polarization when no external electric field is applied, and the direction of spontaneous polarization can be reversed or reoriented by an external electric field. Due to their excellent ferroelectric, dielectric, pyroelectric, and piezoelectric properties, ferroelectric materials are widely used in modern electronic technologies and micromechanical technologies such as ferroelectric memories, infrared detectors, surface acoustic waves, and integrated optoelectronic devices. In terms of solid-state devices, research on ferroelectric materials and their applications has become one of the most popular research topics in the fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C59/255C07C51/41
Inventor 郑岳青刘文林建利许伟
Owner NINGBO UNIV
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