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Lead magnesium niobate-lead titanate and lead zirconate titanate alloplasmic structure film and preparing method of film

A lead zirconate titanate and lead magnesium niobate technology, applied in liquid chemical plating, metal material coating process, coating and other directions, can solve problems such as restricting performance, eliminate the cumulative effect of roughness and reduce leakage current , the effect of easy quantitative doping

Active Publication Date: 2017-06-13
WUHAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the high Curie temperature of most ferroelectric films, the dielectric constant at room temperature is much smaller than the dielectric constant of the Curie point, which greatly limits its performance.

Method used

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  • Lead magnesium niobate-lead titanate and lead zirconate titanate alloplasmic structure film and preparing method of film
  • Lead magnesium niobate-lead titanate and lead zirconate titanate alloplasmic structure film and preparing method of film
  • Lead magnesium niobate-lead titanate and lead zirconate titanate alloplasmic structure film and preparing method of film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The preparation process of lead zirconate titanate sol includes the following steps:

[0049] (1) Using lead acetate trihydrate, zirconium n-propoxide and titanium isopropoxide as raw materials, according to the chemical formula (1-x)PbZrO 3 -xPbTiO 3 Weigh each raw material accurately, x is 0.48, and 15% excess lead acetate trihydrate compensates for lead volatilization;

[0050] (2) Add lead acetate trihydrate to ethylene glycol methyl ether, heat at 60°C to completely dissolve, and distill under reduced pressure at 120°C for 30 minutes to remove excess crystal water to obtain a lead solution;

[0051] (3) Add zirconium n-propoxide and titanium isopropoxide to ethylene glycol methyl ether one by one, stir for 2 hours, and mix them uniformly to obtain a zirconium-titanium mixed solution;

[0052] (4) Mix the two solutions obtained in step (2) and step (3), reflux for 2 hours at 120°C, allow them to fully react and then cool to room temperature to obtain a lead zirconate titanat...

Embodiment 2

[0074] The preparation process of lead zirconate titanate sol includes the following steps:

[0075] (1) Using lead acetate trihydrate, zirconium n-propoxide and titanium isopropoxide as raw materials, according to the chemical formula (1-x)PbZrO 3 -xPbTiO 3 Weigh each raw material accurately, x is 0.45, and an excess of 10% lead acetate trihydrate compensates for lead volatilization;

[0076] (2) Add lead acetate trihydrate to ethylene glycol methyl ether, heat at 50°C to completely dissolve, and distill under reduced pressure at 100°C for 20 minutes to remove excess crystal water to obtain a lead solution;

[0077] (3) Add zirconium n-propoxide and titanium isopropoxide to ethylene glycol methyl ether in sequence, stir for 1 hour, and mix them uniformly to obtain a zirconium-titanium mixed solution;

[0078] (4) Mix the two solutions obtained in step (2) and step (3), reflux for 2 hours at 100°C, allow them to fully react and then cool to room temperature to obtain a lead zirconate t...

Embodiment 3

[0097] The preparation process of lead zirconate titanate sol includes the following steps:

[0098] (1) Using lead acetate trihydrate, zirconium n-propoxide and titanium isopropoxide as raw materials, according to the chemical formula (1-x)PbZrO 3 -xPbTiO 3 Accurately weigh each raw material, x is 0.47, 12% excess lead acetate trihydrate compensates for lead volatilization;

[0099] (2) Add lead acetate trihydrate to ethylene glycol methyl ether, heat at 55°C to completely dissolve, and distill under reduced pressure at 110°C for 40 minutes to remove excess crystal water to obtain a lead solution;

[0100] (3) Add zirconium n-propoxide and titanium isopropoxide to ethylene glycol methyl ether successively, stir for 2 hours, and mix them uniformly to obtain a zirconium-titanium mixed solution;

[0101] (4) Mix the two solutions obtained in step (2) and step (3), reflux for 3 hours at 110°C, allow them to fully react and then cool to room temperature to obtain a lead zirconate titanate ...

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Abstract

The invention relates to a lead magnesium niobate-lead titanate and lead zirconate titanate alloplasmic structure film and a preparing method thereof. Lead magnesium niobate-lead titanate and lead zirconate titanate alloplasmic thin films form the multilayer alloplasmic structure film in different sequences. The temperature coefficient of capacitance is reduced, the dielectric peak widening is improved, and the application field of the film is widened; the dielectric property of the film is effectively improved, and the electric conductance of the film is reduced; meanwhile, the interface effect in the alloplasmic structure can effectively obstruct electronic and hole transmission, the leaked current is reduced, and the ferroelectric properties are improved.

Description

Technical field [0001] The invention belongs to the field of functional film materials, and specifically relates to a heterostructure film of lead magnesium niobate-lead titanate and lead zirconate titanate and a preparation method thereof. Background technique [0002] Ferroelectric thin film is an important type of functional thin film material, with good piezoelectricity, ferroelectricity, pyroelectricity, electro-optical and nonlinear optical properties, etc., and its application and promotion penetrate into various related technical fields. At present, it has been widely used in new functional materials and integrated devices such as non-volatile memory, dynamic random access memory, spintronic devices, and new sensors. [0003] Lead zirconate titanate (PbZr 1-x Ti x O 3 , PZT for short) The ferroelectric material is PbTiO 3 And PbZrO 3 In the solid solution of, there is a quasi-homotype phase boundary (MPB) near x=0.48. In the vicinity of the phase boundary, the crystal stru...

Claims

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Application Information

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IPC IPC(8): C23C18/12
CPCC23C18/1216C23C18/1225C23C18/1254
Inventor 孙华君郭庆虎隋慧婷史文轩
Owner WUHAN UNIV OF TECH
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