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Sodium bismuth phthalate-barium zirconium phthalate leadless piezoelectric ceramic and its preparation method

A technology of barium zirconate titanate and sodium bismuth titanate, applied in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., to achieve the effects of reducing leakage current, easy polarization, and good piezoelectric performance

Inactive Publication Date: 2005-06-08
TSINGHUA UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation and performance of the BNT-BZT binary system lead-free piezoelectric ceramics have not been reported yet.

Method used

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  • Sodium bismuth phthalate-barium zirconium phthalate leadless piezoelectric ceramic and its preparation method
  • Sodium bismuth phthalate-barium zirconium phthalate leadless piezoelectric ceramic and its preparation method
  • Sodium bismuth phthalate-barium zirconium phthalate leadless piezoelectric ceramic and its preparation method

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Embodiment Construction

[0024] The following examples are given to illustrate the present invention in detail. Example: with Bi 2 o 3 、Na 2 CO 3 、TiO 2 As raw material, according to the chemical formula (Bi 0.5 Na 0.5 )TiO 3 Dosing; with BaCO 3 , ZrO 2 、TiO 2 As a raw material, according to the chemical formula Ba(Ti 0.942 Zr 0.058 )O 3 Proceed to the ingredients. Use absolute ethanol as the medium for wet grinding respectively, dry the dry powder after wet grinding for 2-3 hours. BNT raw material powder was pre-fired at 850°C for 3 hours in air, ground and sieved (200 mesh) to obtain BNT raw material powder with a composite perovskite phase; BZT raw material powder was pre-sintered at 1200°C for 3 hours in air, ground After sieving (200 meshes), the BZT raw material powder having a perovskite phase was obtained. With pre-burned BNT, BZT powder as raw material powder, according to the chemical formula (Bi 0.5 Na 0.5 )TiO 3-x Ba(Ti 0.942 Zr 0.058 )O 3 [BNT-BZT100x] (x=0.00, 0.03, ...

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Abstract

A non-Pb piezoelectric bismuth sodium titanate-barium zirconate titatate ceramics, (Bi0.5Na0.5)TiO3-xBa(Ti1-yZry)O3 (BNT-BZT), is prepared by two-step sinter method. Its advantages are high density, low leakage current in polarizing procedure, and high piezoelectric and ferroelectric performance.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional ceramics, and in particular relates to a sodium bismuth titanate-barium zirconate titanate lead-free piezoelectric ceramic and a preparation method thereof which are beneficial to environmental protection. Background technique [0002] Piezoelectric ceramics are an important class of information functional ceramic materials, but the piezoelectric ceramics used on a large scale are mainly lead-based piezoelectric ceramics. Lead-based piezoelectric materials will bring serious harm to human beings and the ecological environment in the process of production, use and disposal. It is inevitable to use lead-free piezoelectric ceramics instead of lead-based piezoelectric ceramics. [0003] Sodium bismuth titanate (Bi 0.5 Na 0.5 )TiO 3 (BNT) was discovered by Smolensky et al. in 1960 (A', A")BO 3 Type composite perovskite ferroelectrics, which belong to the triangular crystal system...

Claims

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Application Information

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IPC IPC(8): C04B35/462C04B35/48C04B35/622H01L41/187
Inventor 李敬锋彭春娥龚文
Owner TSINGHUA UNIV
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