Niobate leadless piezoelectric ceramic with orderedly arranged paracrystal and preparation thereof

An orderly arrangement, lead-free piezoelectric technology, applied in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., can solve the problem of low-scale regulation of perovskite ferroelectric piezoelectric ceramic grains , to achieve a strong demonstration effect, regular shape of grain clusters, easy to promote the effect

Inactive Publication Date: 2009-08-12
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are almost no literature reports on the low-scale regulation and assembly of perovskite ferroelectric ceramic grains, which is one of the key technologies that urgently need to be studied

Method used

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  • Niobate leadless piezoelectric ceramic with orderedly arranged paracrystal and preparation thereof
  • Niobate leadless piezoelectric ceramic with orderedly arranged paracrystal and preparation thereof
  • Niobate leadless piezoelectric ceramic with orderedly arranged paracrystal and preparation thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Formula chemical formula is [K 0.44 Na 0.515 Li 0.045 ][Nb 0.905 Sb 0.045 Ta 0.05 ]O 3 , the molecular weight is 175.96. The mass of ingredients is 70.00g, and each raw material is weighed according to the chemical formula;

[0032] Weigh the required raw material Li 2 CO 3 The mass is 0.6749g, Na 2 CO 3 The mass is 10.8792g, K 2 CO 3 Mass is 12.2183g, Nb 2 o 5 Mass is 48.0896g, Sb 2 o3 The mass is 2.6357g, Ta 2 o 5 The mass is 4.3952g.

[0033] The preparation method is:

[0034] Weigh Li according to the stoichiometric ratio 2 CO 3 、Na 2 CO 3 、K 2 CO 3 , Nb 2 o 5 , Sb 2 o 3 and Ta 2 o 5 After each powder raw material, put it in a ball mill jar, add an appropriate amount of absolute alcohol as a solvent, and after planetary ball milling for 4 hours, dry it in a drying oven at a temperature of 120°C for 12 hours, crush it through an 80-mesh sieve, and obtain a mixture of raw materials powder;

[0035] The obtained mixed powder is pre-synt...

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Abstract

The invention relates to niobate lead-free piezoelectric ceramic with ordered arrangement of paracrystal and a preparation method thereof, belonging to the technical field of lead-free piezoelectric ceramic crystal grain regulation preparation. The chemical formula of the ceramic is [K0.44Na(0.56-x)Lix][Nb(0.95-x)SbxTa0.05]O3, wherein x is more than or equal to 0 and less than or equal to 0.56, and consists of grain colonies; the dimension of each grain colony is between 10 and 1,000 mum; each grain colony is formed by ordered arrangement of paracrystal with the number ranging from 10 to 400; and the dimension of each paracrystal grain is between 1 and 3 mum. The crystal grains have significant anisotropism. Powdered raw materials are mixed to prepare a nanometer mixed precursor by a proper process; and the precursor is prepared into the piezoelectric ceramic formed by crystal grains consisting of orderly arranged paracrystal by the solid phase reaction method through proper process and method regulation, and the ceramic shows excellent piezoelectric performance. The method has bright prospect as the ceramic has strong demonstration effect in the field of crystal grain regulation, and the prepared high performance lead-free niobate piezoelectric ceramic is expected to be applied to the field of a dual purpose piezoelectric transducer in transmitting and receiving.

Description

technical field [0001] The invention relates to a niobate lead-free piezoelectric ceramic with orderly arranged secondary crystals and a preparation method thereof, and belongs to the technical field of lead-free piezoelectric ceramic crystal grain control and preparation. Background technique [0002] According to relevant literature research, passive components and active devices (semiconductor products such as integrated circuits) together constitute the core part of the circuit and are the basis of various electronic information products. In new electronic products, integrated circuits and passive components account for 46.1% and 9.1% of the total production cost of all electronic components and parts, but account for 12.7% and 55.1% of the total installation cost, and even some chips The management and installation costs of the traditional components have exceeded their price. It is not difficult to see that passive electronic components have become a bottleneck restri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622H01L41/187
Inventor 李永祥李正法
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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