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Multilayer lead-free piezoelectric ceramic driver and preparation method thereof

A lead-free piezoelectric and drive technology, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve high cost, limit enterprise development, human and environmental hazards problems such as low cost, low sintering temperature and simple process

Inactive Publication Date: 2020-09-11
CHAOHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, lead-based multilayer piezoelectric ceramic drivers are mainly used in the market. However, the PbO content in lead-based piezoelectric ceramics is as high as 60wt%. Since lead oxide is a volatile toxic substance, PZT materials are used and discarded. Great harm to humans and the environment in the process
At present, the preparation of multilayer piezoelectric ceramic actuators in China is high-temperature co-firing technology. Most of the inner electrodes with palladium content higher than 80% are used in high-temperature co-firing. Palladium is a precious metal, and the cost is high, which will limit the development of enterprises.

Method used

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  • Multilayer lead-free piezoelectric ceramic driver and preparation method thereof
  • Multilayer lead-free piezoelectric ceramic driver and preparation method thereof
  • Multilayer lead-free piezoelectric ceramic driver and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The multilayer lead-free piezoelectric ceramic driver and its preparation method adopt the following steps:

[0027] (1) According to the chemical molecular formula: (1-a) (K 0.5 Na 0.5 ) 0.95 Li 0.05 Nb 0.93 Sb 0.07 -aCaZrO 3 - The stoichiometric ratio of bCuO weighs the raw material Na 2 CO 3 ,K 2 CO 3 , Li 2 CO 3 ,Nb 2 o 5 ,Sb 2 o 5 ,ZrO 2 and CaCO 3 , wherein a=0.04, put into the ball mill tank and carry out mixing, the ball milling medium is absolute ethanol and zirconia balls, the mass ratio of mixed raw materials and zirconia balls is 1:1.2, and the mass ratio with absolute ethanol is 1: 1.5; The mixed raw materials are ball milled at a speed of 360r / min for 24h, dried at 100°C, put into a corundum crucible, covered, and kept at 850°C for 6h, with a heating rate of 3°C / min;

[0028] (2) Grind the powder obtained in step (1) in a mortar, add bCuO and carry out secondary ball milling, wherein b=0.5%, to obtain 0.96 (K 0.5 Na 0.5 ) 0.95 Li 0.05...

Embodiment 2

[0035] The multilayer lead-free piezoelectric ceramic driver and its preparation method adopt the following steps:

[0036] (1) According to the chemical molecular formula: (1-a) (K 0.5 Na 0.5 ) 0.95 Li 0.05 Nb 0.93 Sb 0.07 -aCaZrO 3 - The stoichiometric ratio of bCuO weighs the raw material Na 2 CO 3 ,K 2 CO 3 , Li 2 CO 3 ,Nb 2 o 5 ,Sb 2 o 5 ,ZrO 2 and CaCO 3 , wherein a=0.04, put into the ball mill tank and carry out mixing, the ball milling medium is absolute ethanol and zirconia balls, the mass ratio of mixed raw materials and zirconia balls is 1:1.2, and the mass ratio with absolute ethanol is 1: 1.5; The mixed raw materials are ball milled at a speed of 360r / min for 24h, dried at 100°C, put into a corundum crucible, covered, and kept at 850°C for 6h, with a heating rate of 3°C / min;

[0037] (2) Grind the powder obtained in step (1) in a mortar, add bCuO and carry out secondary ball milling, wherein b=0.5%, to obtain 0.96 (K 0.5 Na 0.5 ) 0.95 Li 0.05...

Embodiment 3

[0044] The multilayer lead-free piezoelectric ceramic driver and its preparation method adopt the following steps:

[0045] (1) According to the chemical molecular formula: (1-a) (K 0.5 Na 0.5 ) 0.95 Li 0.05 Nb 0.93 Sb 0.07 -aCaZrO 3 - The stoichiometric ratio of bCuO weighs the raw material Na 2 CO 3 ,K 2 CO 3 , Li 2 CO 3 ,Nb 2 o 5 ,Sb 2 o 5 ,ZrO 2 and CaCO 3 , wherein a=0.04, put into the ball mill tank and carry out mixing, the ball milling medium is absolute ethanol and zirconia balls, the mass ratio of mixed raw materials and zirconia balls is 1:1.2, and the mass ratio with absolute ethanol is 1: 1.5; The mixed raw materials are ball milled at a speed of 360r / min for 24h, dried at 100°C, put into a corundum crucible, covered, and kept at 850°C for 6h, with a heating rate of 3°C / min;

[0046] (2) Grind the powder obtained in step (1) in a mortar, add bCuO and carry out secondary ball milling, wherein b=0.5%, to obtain 0.96 (K 0.5 Na 0.5 ) 0.95 Li 0.05...

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Abstract

The invention relates to a multilayer lead-free piezoelectric ceramic driver and a preparation method thereof. The chemical formula is (1-a) (K0. 5Na0. 5) 0.95 Li 0.05Nb0.93Sb0.07-aCaZrO3-bCuO, wherein a is equal to 0.01-0.05, and b is equal to 0.1-2%. Piezoelectric ceramic powder is synthesized through a traditional solid-phase method, slurry is prepared from the powder, then a piezoelectric ceramic sheet is prepared through a tape casting method, and then the laminated driver is manufactured through electrode printing and co-firing through a three-step sintering method. The method is simplein process and can be widely applied to high-precision displacement controllers such as piezoelectric ceramic drivers.

Description

technical field [0001] The invention belongs to the field of electronic information functional materials and components, and in particular relates to a multilayer lead-free piezoelectric ceramic driver and a preparation method thereof. Background technique [0002] The driver is one of the core components in the intelligent structure, and the driver is considered to be the main factor affecting the life of electronic components, and among most drivers, the ceramic driver has received extensive attention because of its excellent performance. [0003] The multilayer piezoelectric ceramic driver uses the inverse piezoelectric effect of piezoelectric ceramics to generate displacement after applying voltage to the multilayer piezoelectric ceramic driver. It is a miniaturized and integrated electronic component. Multilayer piezoelectric ceramic drivers have been widely used in laser optical path adjustment, loudspeakers, machine tool servo cutter head displacement control, linear ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622C04B35/64C04B41/88H02N2/06H02N2/14
CPCC04B35/495C04B35/622C04B35/64C04B41/009C04B41/5116C04B41/88C04B2235/3201C04B2235/3203C04B2235/3208C04B2235/3248C04B2235/3255C04B2235/3281C04B2235/3294C04B2235/6562C04B2235/6567H02N2/22
Inventor 张杨高华敏杨绳岩徐小勇
Owner CHAOHU UNIV