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Lead-free piezoelectric knitting ceramic of titanic acid bismuth sodium-titanic acid bismuth potassium and its production

A potassium bismuth titanate, lead-free piezoelectric technology, applied in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., can solve problems such as environmental pollution

Inactive Publication Date: 2007-09-05
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing piezoelectric ceramics will pollute the environment during use and discarded treatment due to lead, the present invention proposes bismuth sodium titanate-bismuth potassium titanate lead-free piezoelectric textured ceramics and its preparation method to replace traditional lead-based piezoelectric ceramics

Method used

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  • Lead-free piezoelectric knitting ceramic of titanic acid bismuth sodium-titanic acid bismuth potassium and its production
  • Lead-free piezoelectric knitting ceramic of titanic acid bismuth sodium-titanic acid bismuth potassium and its production
  • Lead-free piezoelectric knitting ceramic of titanic acid bismuth sodium-titanic acid bismuth potassium and its production

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Embodiment 1

[0024] In this embodiment, the microcrystalline template bismuth titanate is mixed with the original powder, organic solvent and binder, wherein:

[0025] The microcrystalline template of textured ceramics is made of 3 parts of titanium dioxide, 2 parts of bismuth oxide, 15% by weight of sodium chloride and potassium chloride, wherein the molar ratio of sodium chloride and potassium chloride is 1:1. The raw powder includes 10% by weight of sodium carbonate, 2.5% by weight of potassium carbonate, 22% by weight of titanium dioxide and 24.5% by weight of bismuth oxide. The binder is 30% of the total weight of the powder, and the organic solvent is 50% of the total weight of the powder.

[0026] In this embodiment, a lead-free piezoelectric textured ceramic is prepared by using a chemical method. Concrete preparation steps are:

[0027] The first step: preparation of microcrystalline template bismuth titanate

[0028] (1) After mixing analytically pure bismuth oxide and titaniu...

Embodiment 2

[0038] In this embodiment, the microcrystalline template bismuth titanate is mixed with the original powder, organic solvent and binder, wherein:

[0039] The microcrystalline template of textured ceramics is made of 3 parts of titanium dioxide, 2 parts of bismuth oxide, 15% by weight of sodium chloride and potassium chloride, wherein the molar ratio of sodium chloride and potassium chloride is 1:1. The raw powder includes 10% by weight of sodium carbonate, 2.5% by weight of potassium carbonate, 28.5% by weight of titanium dioxide and 24% by weight of bismuth oxide. The binder is 40% of the total weight of the powder. The organic solvent is 55% of the total weight of the powder.

[0040] In this embodiment, a lead-free piezoelectric textured ceramic is prepared by using a chemical method. Concrete preparation steps are:

[0041] The first step: preparation of microcrystalline template bismuth titanate

[0042] (1) After mixing analytically pure bismuth oxide and titanium d...

Embodiment 3

[0052] In this embodiment, the microcrystalline template bismuth titanate is mixed with the original powder, organic solvent and binder, wherein:

[0053] The microcrystalline template of textured ceramics is made of 3 parts of titanium dioxide, 2 parts of bismuth oxide, 15% by weight of sodium chloride and potassium chloride, wherein the molar ratio of sodium chloride and potassium chloride is 1:1. The raw powder includes 10% by weight of sodium carbonate, 2.5% by weight of potassium carbonate, 28.5% by weight of titanium dioxide and 29% by weight of bismuth oxide. The binder is 45% of the total weight of the powder. The organic solvent is 60% of the total weight of the powder.

[0054] In this embodiment, a lead-free piezoelectric textured ceramic is prepared by using a chemical method. The specific steps are:

[0055] The first step: preparation of microcrystalline template bismuth titanate

[0056] (1) After mixing analytically pure bismuth oxide and titanium dioxide, ...

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Abstract

A lead-free piezoelectric sodium bismuth titanate-potassium bismuth titanate texture ceramics is prepared from the microcrystalline template (bismuth titanate) prepared from TiO2, bismuth oxide, sodium chloride and potassium chloride, the raw powder of sodium carbonate, potassium carbonate, TiO2 and bismuth oxide, organic solvent, and adhesive through mixing, ball grinding, doctor blading, laminating, isostatic pressing in hot water, cutting pre-calcining, and coating Ag.

Description

(1) Technical field [0001] The invention relates to the field of lead-free piezoelectric ceramics in the subject of materials, and relates to lead-free piezoelectric textured ceramics of sodium bismuth titanate-potassium bismuth titanate and a preparation method thereof. (2) Background technology [0002] Piezoelectric materials are an important class of high-tech new materials with fierce international competition, and are widely used in high-tech fields such as information, laser, navigation and biology. [0003] At present, the most widely used piezoelectric material is perovskite-type lead zirconate titanate (PbZr x Ti 1-x o 3 , abbreviated as PZT) piezoelectric ceramics, its application has been involved in all aspects of human social life, but these materials are also lead-containing materials, so no matter how high their performance is, their development will be restricted by environmental protection issues. In lead-containing piezoelectric materials, the content o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/475C04B35/622H01L41/187H10N30/853
Inventor 张昌松高峰郭晨洁田长生
Owner NORTHWESTERN POLYTECHNICAL UNIV
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