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Method for preparing leadless piezoelectric potassium sodium niobate film

A potassium sodium niobate, lead-free piezoelectric technology, applied in chemical instruments and methods, inorganic chemistry, niobium compounds, etc., can solve the problems of unstable potassium sodium niobate precursor solution and inability to obtain performance potassium sodium niobate films, etc. , to achieve the effect of good preferred orientation, not easy to hydrolyze, and high product purity

Inactive Publication Date: 2009-03-18
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(Nakashima, Y., et al., Lead-free piezoelectric (K, Na) NbO3 thin films derived from metal alkoxide precursors. Japanese Journal of Applied Physics Part 2-Letters & Express Letters, 2007.46(12-16): 311-313; Nakashima, Y., et al, Chemical Processing and Characterization of Ferroelectric (K, Na) NbO3 Thin Films. Japanese Journal of Applied Physics, 2007, 46, 10B, 6971-6975; Kiyotaka Tanaka, et al, Effect of (Na, K) -Excess Precursor Solutions on Alkoxy-Derived (Na, K)NbO3Powders and Thin Films.Japanese Journal of Applied Physics, 2007, 46, 10B, 6964-6970), because the precursor solutions are all metal alcohol salt combinations, so the prepared niobic acid Potassium sodium precursor solution is very unstable and easy to hydrolyze, so it is impossible to obtain potassium sodium niobate film with excellent performance

Method used

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  • Method for preparing leadless piezoelectric potassium sodium niobate film
  • Method for preparing leadless piezoelectric potassium sodium niobate film
  • Method for preparing leadless piezoelectric potassium sodium niobate film

Examples

Experimental program
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Embodiment 1

[0017] Molar ratio NbCl 5 : Ethanol = 1: 10 Weigh anhydrous niobium pentachloride and absolute ethanol respectively, use anhydrous benzene as the reaction solvent, and then feed ammonia gas for 3 hours, and the obtained white precipitate NH 4 Cl suction filtration, the obtained filtrate was washed with benzene, and the benzene and excess absolute ethanol were removed by normal pressure distillation to obtain a yellow transparent niobium ethanol solution.

[0018] According to Na 0.5 K 0.5 The molar ratio of potassium, sodium and niobium in NbO3 is Na:K:Nb=0.5:0.5:1, first weigh anhydrous sodium acetate and anhydrous potassium acetate, and dissolve them in acetic acid solution to obtain a potassium-sodium mixed solution ; Next, take niobium ethanol solution and dissolve it in ethylene glycol methyl ether solution to obtain niobium-containing solution. Mix the potassium-sodium-containing mixed solution obtained above with the niobium-containing solution, heat to 100° C., and ...

Embodiment 2

[0021] Molar ratio NbCl 6 : ethanol=1:14 Weigh anhydrous niobium pentachloride and absolute ethanol respectively, take anhydrous benzene as reaction solvent, pass into ammonia gas again for 3 hours, the white precipitate NH obtained 4 Cl suction filtration, the obtained filtrate was washed with benzene, and the benzene and excess absolute ethanol were removed by normal pressure distillation to obtain a yellow transparent niobium ethanol solution.

[0022] According to Na 0.5 K 0.5 The molar ratio of potassium, sodium and niobium in NbO3 is Na:K:Nb=0.5:0.5:1, first weigh anhydrous sodium acetate and anhydrous potassium acetate, dissolve them in acetic acid solution, and obtain a mixed solution containing potassium and sodium ; Next, take niobium ethanol solution and dissolve it in ethylene glycol methyl ether solution to obtain niobium-containing solution. Mix the potassium-sodium-containing mixed solution obtained above with the niobium-containing solution, heat to 100° C.,...

Embodiment 3

[0025] Molar ratio NbCl 5 : ethanol=1:16 Weigh anhydrous niobium pentachloride and absolute ethanol respectively, take anhydrous benzene as reaction solvent, pass into ammonia gas again for 4 hours, the white precipitate NH obtained 4 Cl suction filtration, the obtained filtrate was washed with benzene, and the benzene and excess absolute ethanol were removed by normal pressure distillation to obtain a yellow transparent niobium ethanol solution.

[0026] According to Na 0.5 K 0.5In NbO the molar ratio Na:K:Nb=0.5:0.5:1 ratio of sodium potassium and niobium in NbO, at first take by weighing anhydrous sodium acetate and anhydrous potassium acetate, be dissolved in the acetic acid solution, obtain the mixed solution containing potassium sodium; Next, take the niobium ethanol solution and dissolve it in the ethylene glycol methyl ether solution to obtain a niobium-containing solution. Mix the potassium-sodium-containing mixed solution obtained above with the niobium-containing...

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Abstract

The invention relates to the field of lead-free functional piezoelectric materials, in particular to a preparation method of a lead-free piezoelectric potassium-sodium niobate film. The method includes the following steps: absolute columbium pentachloride NbCl5 and absolute ethyl alcohol are weighed and anhydrous benzene is used as a reaction solvent. Ammonia gas is added, and then sucking filtration, washing and distillation are carried out to obtain a columbium ethoxide solution; anhydrous sodium acetate and anhydrous potassium acetate are weighted and dissolved in a hexanoic acid solution to obtain a mixed solution containing potassium and sodium; secondly, the columbium ethoxide solution is weighed and dissolved in an ethylene glycol monomethyl ether solution to obtain a solution containing columbium; the mixed solution containing potassium and sodium and the solution containing columbium, obtained previously, are mixed, heated and stirred to obtain the solution of potassium-sodium niobate collosol which is used as a precursor solution for preparing the film by the use of a rotary film making method.

Description

technical field [0001] The invention relates to the field of lead-free piezoelectric functional materials, in particular to a preparation method of a lead-free piezoelectric potassium sodium niobate film. Background technique [0002] At present, the production of piezoelectric materials still focuses on the traditional lead zirconate titanate Pb (Zr, Ti) O3 (PZT) based piezoelectric ceramics, but the content of lead oxide in PZT based ceramics exceeds 60% of the total mass of raw materials. Lead oxide is a volatile toxic substance, which brings serious harm to human beings and the ecological environment, which is contrary to the sustainable development of human society. [0003] The lead-free piezoelectric material potassium sodium niobate, due to its excellent piezoelectric properties, has attracted widespread attention and is considered as a possible substitute for PZT-based piezoelectric materials (Yasuyoshi Satio, Hisaaki Takao, et al, Lead-free piezoceramic , Nature, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G33/00
Inventor 任巍阎鑫吴小清王玲艳史鹏陈晓峰姚熹
Owner XI AN JIAOTONG UNIV
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