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A niobate lead-free piezoelectric ceramic with ordered subcrystal arrangement and preparation method 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: 2011-12-14
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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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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  • A niobate lead-free piezoelectric ceramic with ordered subcrystal arrangement and preparation method thereof
  • A niobate lead-free piezoelectric ceramic with ordered subcrystal arrangement and preparation method thereof
  • A niobate lead-free piezoelectric ceramic with ordered subcrystal arrangement and preparation method thereof

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Experimental program
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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 a niobate lead-free piezoelectric ceramic with orderly arrangement of secondary crystals and a preparation method thereof, and belongs to the technical field of lead-free piezoelectric ceramic crystal grain regulation and preparation. The chemical formula of the present invention is: [K0.44Na(0.56-x)Lix][Nb(0.95-x)SbxTa0.05]O3, wherein, 0≤x≤0.56, it is composed of grain groups, and the scale of each grain group At 10-1000 μm, each grain group is composed of 10-400 sub-grains arranged in an orderly manner, and the size of each sub-grain is 1-3 μm. The grains have significant anisotropy. The mixed raw material powder of the present invention prepares a nano-scale mixed precursor with a suitable process, and prepares piezoelectric ceramics and ceramics composed of crystal grains composed of orderly arranged secondary crystals through a solid-state reaction method through proper process and method control. exhibits excellent piezoelectric properties. The invention has a bright prospect because of its 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 dual-purpose piezoelectric transducers for sending 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 Patents(China)
IPC IPC(8): C04B35/495C04B35/622H01L41/187H10N30/853
Inventor 李永祥李正法
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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