D-tartaric acid 2,2-dipyridylamine cobalt ferroelectric function material and preparation method

A technology of pyridylamine cobalt iron and bipyridylamine, which is applied in the field of D-tartrate 2,2-dipyridylamine cobalt ferroelectric functional materials and its preparation, can solve the problems of not being able to meet the requirements of microelectronic devices, and achieve low cost and good performance. Ferroelectric properties, the effect of easy industrialization

Inactive Publication Date: 2013-04-03
NINGBO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the mid-1980s, breakthroughs in thin film preparation technology cleared the way for the preparation of high-quality ferroelectric thin films. In recent years, with the continuous improvement of the requirements for device miniaturization, functional integration, and reliability, the traditional ferroelectric Bulk has been unable to meet the requirements of microelectronic devices due to size constraints
Judging from the current research status, the research, development and application of ferroelectric materials with high performance are still in the development stage.

Method used

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  • D-tartaric acid 2,2-dipyridylamine cobalt ferroelectric function material and preparation method
  • D-tartaric acid 2,2-dipyridylamine cobalt ferroelectric function material and preparation method
  • D-tartaric acid 2,2-dipyridylamine cobalt ferroelectric function material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1M Na 2 CO 3 Dissolve in water to form Na with a concentration of 1mol / L 2 CO 3 solution, weigh 1.0mmol of Co(NO 3 ) 2 Added to 1.0mL of Na 2 CO 3 In the solution, after stirring and dissolving, let it stand for precipitation until no precipitation is complete, centrifuge to obtain cobalt carbonate precipitated in purple, wash it with water for 3 to 5 times, and rinse it clean; add 1.0mmol of D-tartaric acid, 1.0mmol of 2,2 - Dipyridylamine was dissolved in methanol solution prepared by 10ml methanol and 10ml water, and stirred at 60°C until the solids were completely dissolved to obtain a mixed solution of D-tartrate 2,2-dipyridylamine; the washed cobalt carbonate was added to D- In the mixed solution of 2,2-dipyridylamine tartrate, continue to stir while adding, and stir for 10-30 minutes after the addition is complete, filter to remove insoluble matter, and obtain D-cobalt solution of 2,2-dipyridylamine tartrate, and let it stand at room temperature After 2 to...

Embodiment 2

[0020] It is basically the same as Example 1, except that Na 2 CO 3 by K 2 CO 3 Alternate, K 2 CO 3 The concentration of the solution is 0.1mol / L, Co(NO 3 ) 2 Replaced by cobalt chloride dissolved in 15 mL of K 2 CO 3 in solution.

Embodiment 3

[0022] It is basically the same as Example 1, except that Na 2 CO 3 The concentration is 0.5mol / L, Co(NO 3 ) 2 Replaced by cobalt perchlorate dissolved in 0.2 mL of Na 2 CO 3 in solution.

[0023] Adopt Rigaku R-Axis Rapid single crystal diffractometer to carry out single crystal X-ray diffraction to the crystal that above-mentioned embodiment obtains, obtain as follows figure 1 Structural diagram of 2,2-dipyridylamine D-tartrate shown.

[0024]The PXRD pattern uses a Bruker D8Focus powder diffractometer to collect the powder diffraction pattern of the ferroelectric functional material sample at room temperature at a scanning speed of 6° / min within a 2θ angle range of 5-50°.

[0025] The TG-DTA curve adopts Seiko TG / DTA6300 differential thermal analyzer, with α-Al 2 o 3 As a reference, at 200ml / min N 2 Air flow protection, the TG-DTA curve figure of this ferroelectric functional material is measured under the condition of 10 ℃ / min of heating rate.

[0026] The hyster...

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Abstract

The invention discloses a D-tartaric acid 2,2-dipyridylamine cobalt ferroelectric function material and a preparation method. The molecular formula is [Co(dpa)(D-C4H4O6)]2.8H2O, wherein dpa is 2,2-dipyridylamine; the ferroelectric function material is monoclinic system powder of which the purity is not lower than 99%; the structure of space group is C2; the ferroelectric characteristic parameters are as follows: the remanent polarization strength 2Pr=0.05(mu)C.cm<-2>, coercive electric field 2Ec=15.2kv.cm<-1>, and saturization polarization strength Ps=0.249(mu)c.cm<-2>; and the ferroelectric function material has relatively good ferroelectric characteristics. The preparation method of the ferroelectric function material comprises the following steps of: enabling the newly prepared cobalt carbonate to react with the mixed solution of D-tartaric acid 2,2-dipyridylamine to obtain a D-tartaric acid 2,2-dipyridylamine cobalt solution; devitrifying; and grinding to obtain ferroelectric function material powder passing through a 100-mesh sieve. The method has the advantages of few processes, simple technology, low requirements on equipment, cheap materials of cobalt salt and tartaric acid, no pollution, low cost and easiness in realizing industrialization.

Description

technical field [0001] The invention relates to a ferroelectric functional material, in particular to a D-tartrate 2,2-dipyridylamine cobalt ferroelectric functional material and a preparation method. Background technique [0002] Ferroelectric functional materials have important characteristics such as dielectricity, piezoelectricity, pyroelectricity, ferroelectricity, electro-optic effect, acousto-optic effect, photorefractive effect and nonlinear optical effect, and can be used to make ferroelectric memory, thermal Discharge infrared detectors, spatial light modulators, optical waveguide dielectric phase shifters, voltage-controlled filters and other important new components. These components have broad application prospects in aerospace, communication, home appliances, national defense and other fields. From a crystallographic point of view, only 1(C 1 ), m(C s ), 2(C 2 ), 2m (C 2v ), 3(C 3 ), 3m (C 3v ), 4(C 4 ), 4m (C 4v ), 6(C 6 ), 6m (C 6v ) of 10 polar po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/06C30B29/56C30B7/14
Inventor 郑岳青戚金丽虞晓科常海圣许伟朱红林林建利
Owner NINGBO UNIV
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