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Potassium niobate sodium-based multi-layer piezoelectric ceramic element and preparing method thereof

A piezoelectric ceramic element, potassium sodium niobate-based technology, applied in the manufacture/assembly of electrical components, piezoelectric/electrostrictive/magnetostrictive devices, magnetostrictive devices, etc., can solve the problem of reducing the piezoelectric performance of ceramics , Alkali metals are easy to volatilize, product performance decline and other problems, to achieve the effect of increasing the phase ratio, improving the uniformity and good effect

Active Publication Date: 2014-09-17
PAIHE SCI & TECH HLDG CO LTD BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For this reason, what the present invention is to solve is that the existing potassium-sodium niobate-based lead-free piezoelectric ceramic sheet has the problem that the alkali metal is easy to volatilize during the preparation process, which causes the actual composition of the product to deviate from the designed value, and even produces a non-stoichiometric Ratio of the component area, generate tungsten bronze phase, pyrochlore and other impurity phases, reduce the piezoelectric performance of ceramics, increase dielectric loss, and then cause product performance to decline. For this reason, the present invention provides a potassium sodium niobate-based multilayer Piezoelectric ceramic elements with high piezoelectric properties

Method used

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  • Potassium niobate sodium-based multi-layer piezoelectric ceramic element and preparing method thereof
  • Potassium niobate sodium-based multi-layer piezoelectric ceramic element and preparing method thereof

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Experimental program
Comparison scheme
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Embodiment 1

[0045] The formula stoichiometric formula of the potassium sodium niobate-based multilayer piezoelectric ceramic element in this embodiment is:

[0046] (Na 0.52 K 0.44 Li 0.04 )(Nb 0.91 Sb 0.07 Ta 0.02 )O 3

[0047] The method for preparing the above-mentioned potassium sodium niobate-based multilayer piezoelectric ceramic element includes the following steps:

[0048] (1) Raw material preparation and ingredients

[0049] Li 2 CO 3 , Na 2 CO 3 , K 2 CO 3 These alkali metal carbonates are easy to absorb water and be damp, so they must be dried at 60°C for 12 hours before use. According to the stoichiometric ratio of the formula general formula, first weigh: Li 2 CO 3 , Na 2 CO 3 , K 2 CO 3 ; Then weigh Nb 2 O 5 , Ta 2 O 5 , Sb 2 O 3 .

[0050] (2) Ball milling compound

[0051] Add the prepared raw materials to absolute ethanol as the dispersant, use zirconia balls as the ball milling medium, and mill the planetary ball mill for 4 hours (please provide the manufacturer model of the plan...

Embodiment 2

[0065] The formula stoichiometric formula of the potassium sodium niobate-based multilayer piezoelectric ceramic element in this embodiment is:

[0066] (Na 0.52 K 0.44 Li 0.04 )(Nb 0.87 Sb 0.07 Ta 0.06 )O 3

[0067] (1) Raw material preparation and ingredients

[0068] Li 2 CO 3 , Na 2 CO 3 , K 2 CO 3 These alkali metal carbonates are easy to absorb water and become damp, so they must be dried at 80°C for 8 hours before use. According to the stoichiometric ratio of the formula general formula, first weigh: Li 2 CO 3 , Na 2 CO 3 , K 2 CO 3 ; Then weigh Nb 2 O 5 , Ta 2 O 5 , Sb 2 O 3 .

[0069] (2) Ball milling compound

[0070] Add the prepared raw materials to absolute ethanol as dispersant, zirconia ball as the ball milling medium, and use a planetary ball mill for 4 hours or an ordinary tank mill for 24 hours.

[0071] (3) Initial calcination and ball milling

[0072] The slurry obtained after ball milling and mixing is dried to obtain a mixed powder. The mixed powder is crushed and s...

Embodiment 3

[0084] The formula stoichiometric formula of the potassium sodium niobate-based multilayer piezoelectric ceramic element in this embodiment is:

[0085] (Na 0.52 K 0.44 Li 0.04 )(Nb 0.90 Sb 0.07 Ta 0.03 )O 3

[0086] (1) Raw material preparation and ingredients

[0087] Li 2 CO 3 , Na 2 CO 3 , K 2 CO 3 These alkali metal carbonates are easy to absorb water and become damp, so they must be dried at 70°C for 10 hours before use. According to the stoichiometric ratio of the formula general formula, first weigh: Li 2 CO 3 , Na 2 CO 3 , K 2 CO 3 ; Then weigh Nb 2 O 5 , Ta 2 O 5 , Sb 2 O 3 .

[0088] (2) Ball mill mixture

[0089] Add the prepared raw materials to absolute ethanol as dispersant, zirconia balls as ball milling medium, and planetary ball mill for 4 hours.

[0090] (3) Initial calcination and ball milling

[0091] The slurry obtained after ball milling and mixing is dried to obtain mixed powder. The mixed powder is crushed and sieved. After passing through a 60-mesh standard siev...

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Abstract

The invention provides a potassium niobate sodium-based multi-layer piezoelectric ceramic element. A chemometry general form of a formula of potassium niobate sodium-based leadless piezoelectric ceramics is that [(Na0.52K0.44)1-xLix] (Nb0.93-ySb0.07Tay)O3, wherein 0.02<=x<=0.06, 0.02<=y<=0.06, a piezoelectric constant ranges from 300 pC / N to 350 pC / N and even higher, a dielectric constant ranges from 1700 to 2000, and an electromechanical coupling coefficient ranges from 0.40 to 0.45.

Description

Technical field [0001] The present invention relates to the technical field of functional ceramic materials, in particular to a lithium, antimony, and tantalum co-doped potassium sodium niobate-based multilayer piezoelectric ceramic element. The present invention further relates to lithium, antimony and tantalum co-doped potassium niobate Preparation method of sodium-based multilayer piezoelectric ceramic components. Background technique [0002] Multi-layer piezoelectric ceramic components are an important electronic functional ceramic component. Compared with ordinary single-layer piezoelectric ceramic components, they have the advantages of low driving voltage, large piezoelectric strain, and easy miniaturization and thinning. Multilayer piezoelectric ceramic components are widely used in piezoelectric transformers, piezoelectric drivers, piezoelectric speakers, piezoelectric floats, and multilayer ceramic capacitors. Among them, piezoelectric drivers include automotive engine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/083H01L41/187H01L41/47C04B35/495H10N30/50H10N30/853H10N35/01
Inventor 褚祥诚高仁龙李龙土
Owner PAIHE SCI & TECH HLDG CO LTD BEIJING
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