Bismuth sodium titanate series film material and preparing process thereof

A technology of sodium bismuth titanate and thin film materials, which is applied in chemical instruments and methods, ceramic layered products, layered products, etc., can solve the problems such as no reports of bismuth sodium titanate series thin films, and achieve breakdown strength High, high resistivity, small temperature change effect

Inactive Publication Date: 2003-03-12
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] So far, there has not been any relevant report on bismuth sodium titanate series thin films in the world

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Configure one liter of sodium bismuth titanate (Bi 1 / 2 Na 1 / 2 )TiO 3 Solution, X=0 is selected in the molecular formula, and the specific preparation steps are as follows:

[0035] (1) Accurately weigh analytically pure raw materials according to the stoichiometric ratio of molecular formula: 49.00 grams of bismuth nitrate, 8.58 grams of sodium nitrate

[0036] grams, put them into a grinder or grinder, and grind them into fine powder; dissolve the sodium nitrate ground into fine powder in 300ml

[0037] Ethylene glycol methyl ether, and continuously heating and stirring, the heating temperature is 100 ° C; make 1# solution; dissolve bismuth nitrate

[0038] In 600ml of glacial acetic acid, and continuously heating and stirring, the temperature is 100 ℃, to make 2# solution;

[0039] (2) Pour the 1# solution into the 2# solution, and continue to heat and stir, and control the heating temperature at 100°C until the solution is dissolved.

[0040] The solution is mix...

Embodiment 2

[0054] Configure one liter of 0.5mol concentration of bismuth sodium titanate barium Ba 0.1 (Bi 1 / 2 Na 1 / 2 ) 0.9 TiO 3 Solution, choose X=0.1 in molecular formula; M=Ba, concrete preparation steps are as follows:

[0055] (1) Accurately weigh analytically pure raw materials according to the stoichiometric ratio of molecular formula: 35.10 grams of bismuth acetate, 7.46 grams of sodium acetate

[0056] gram, 5.52 grams of barium acetate, put into grinder or grinding machine respectively, grind into fine powder; Grind into fine powder

[0057] Dissolve sodium acetate and barium acetate in 300ml ethylene glycol methyl ether, and keep heating and stirring, the heating temperature is

[0058] 100°C; make 1# solution; dissolve bismuth nitrate in 600ml glacial acetic acid, and keep heating and stirring,

[0059] The temperature is 100°C, make 2# solution;

[0060] (2)~(7) process steps are identical with embodiment 1 (2)~(7) process steps.

Embodiment 3

[0062] Prepare one liter of sodium bismuth titanate lead Pb with a concentration of 0.5mol 0.2 (Bi 1 / 2 Na 1 / 2 ) 0.8 TiO 3 Solution, choose X=0.1 in molecular formula; M=Pb, concrete preparation steps are as follows:

[0063] (1) Accurately weigh analytically pure raw materials according to the stoichiometric ratio of molecular formula: 39.20 grams of bismuth nitrate, 6.87 grams of sodium nitrate

[0064] gram, 15.33 grams of lead acetate, put into grinder or grinder respectively, and grind into fine powder;

[0065] Dissolve sodium acetate and lead acetate in 600ml of ethylene glycol methyl ether, and keep heating and stirring, and the heating temperature is 100°C;

[0066] Become 1# solution; Dissolve bismuth nitrate in 300ml glacial acetic acid, and keep heating and stirring, the temperature is 100 ℃,

[0067] Make 2# solution;

[0068] (2)~(7) process steps are identical with embodiment 1 (2)~(7) process steps.

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PUM

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Abstract

A bismuth sodium titanate thin film series has a formula of (1-X)(Bi0.5Na0.5)TiO3+XMTiO3, where x=0-0.6 and M is chosen from Ba, Pb, Sr and Ca, and is prepared by metal-organic solution depositing method. Its advantages are proper electric conductivity in ferroelectric region, wide sinter temp range, and high storage and thermoelectric properties.

Description

(1) Technical field [0001] The invention relates to a bismuth sodium titanate series film material and a preparation method thereof, belonging to the technical field of film materials. (2) Background technology [0002] The molecular formula of sodium bismuth titanate material is (Bi 1 / 2 Na 1 / 2 )TiO 3 . It is a perovskite ferroelectric invented by Smolensky et al. in 1960. It has the following advantages: strong ferroelectricity (remanent polarization Pr=38μC / cm 2 ); large piezoelectric coefficient (k t 、k 33 , about 50%); the dielectric constant εr is 240 to 340; the pyroelectric performance is equivalent to that of lead titanate and lead zirconate titanate PZT; the acoustic performance is good (the frequency constant Nρ=3200Hz m), which is conducive to the production of acoustic Surface wave device; it also has the characteristics of relaxor ferroelectricity, and the firing temperature is medium temperature sintering. As a ceramic material, sodium bismuth titanate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B18/00C04B35/462C04B35/475C04B35/622
Inventor 王卓杨长红房昌水王民韩建儒陈焕矗胡季帆
Owner SHANDONG UNIV
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