Hydrated L-tartaric acid neodymium sulfate ferroelectric functional material and preparation method thereof

A ferroelectric functional material and tartaric acid technology, applied in the field of ferroelectric functional materials, can solve problems such as the inability to meet the requirements of microelectronic devices, and achieve the effects of low cost, low equipment requirements, and easy industrialization

Inactive Publication Date: 2013-05-22
NINGBO UNIV
View PDF4 Cites 2 Cited by
  • Summary
  • 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 t

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hydrated L-tartaric acid neodymium sulfate ferroelectric functional material and preparation method thereof
  • Hydrated L-tartaric acid neodymium sulfate ferroelectric functional material and preparation method thereof
  • Hydrated L-tartaric acid neodymium sulfate ferroelectric functional material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 0.5mmol of neodymium trioxide and 2.0mmol of L-tartaric acid, dissolve them in a solvent prepared from 16mL of deionized water and 2mL of ethanol, stir for about 30min to completely dissolve the neodymium trioxide and L-tartaric acid; Sulfuric acid solution 0.5mL, then placed in a polytetrafluoroethylene-lined stainless steel reaction kettle, after stirring evenly, seal the stainless steel reaction kettle, and react at a constant temperature for 3 days at a reaction temperature of 150°C; after the reaction is completed, let the stainless steel reaction kettle 5°C / h cooling mode, cooled to room temperature, to obtain lavender L-tartrate neodymium sulfate flaky crystals, grind the hydrated L-tartrate neodymium sulfate flaky crystals, and sieve with a 100 mesh sieve to obtain the 100 mesh sieve Lavender hydrated L-tartrate neodymium sulfate monoclinic powder. The PXRD pattern of this ferroelectric functional material is as follows figure 2 As shown, it can be seen ...

Embodiment 2

[0017] It is basically the same as Example 1, except that the L-tartaric acid is 0.5mmol, dissolved in a solvent prepared from 17mL deionized water and 3mL ethanol, 0.6mL of sulfuric acid solution, in a stainless steel reactor, the reaction temperature is 120 ° C, constant temperature The response time is 10 days.

Embodiment 3

[0019] It is basically the same as Example 1, except that L-tartaric acid is 1.0 mmol, sulfuric acid solution is 0.4 mL, in a stainless steel reactor, the reaction temperature is 200° C., and the constant temperature reaction time is 1 day.

[0020] 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 neodymium sulfate L-tartrate hydrate shown.

[0021] Use Bruker D 8 Focus powder diffractometer with 2θ angle range of 5-50°, scan the hydrated L-tartrate neodymium sulfate ferroelectric powder obtained in the above example at a scanning speed of 8° / min, and collect samples at room temperature Powder diffraction pattern (PXRD), and compared with the single crystal simulation PXRD pattern, such as figure 2 shown.

[0022] A Seiko TG / DTA 6300 differential thermal analyzer was used to measure α–Al 2 o 3 As a reference substanc...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a hydrated L-tartaric acid neodymium sulfate ferroelectric functional material and a preparation method thereof. The ferroelectric functional material has a molecular formula of {Nd2(H2O)2(L-C4H4O6)2(SO4)}.4H2O. The ferroelectric functional material has the following ferroelectric characteristic parameters: the remanent polarization 2Pr is 0.390 mu C/cm<2>; the coercive electric field 2Ec is 74.7 kv/cm; and the saturation polarization Ps is 0.307 mu C/cm<2>. The saturation polarization of the ferroelectric functional material is 1.23 times that of seignette salt, so that the ferroelectric functional material disclosed by the invention is a novel ferroelectric body with excellent ferroelectric performance. The preparation method comprises the following steps: carrying out a solvothermal reaction between neodymium oxide and L-tartaric acid by using an ethanol solvent; and adding a sulfuric acid solution into the mixture and nucleating in a reaction kettle so as to grow into the hydrated L-tartaric acid neodymium sulfate. The preparation method has the advantages of short flow, simple process, low equipment requirement, no pollution and low cost and can be easily industrialized.

Description

technical field [0001] The invention relates to a ferroelectric functional material, in particular to a hydrated L-tartrate neodymium sulfate 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 p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C07F5/00
Inventor 戚金丽郑岳青虞晓科常海圣许伟朱红林林建利
Owner NINGBO UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap