CN212681600U - Multilayer leadless piezoelectric atomization element - Google Patents
Multilayer leadless piezoelectric atomization element Download PDFInfo
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- CN212681600U CN212681600U CN202020229410.4U CN202020229410U CN212681600U CN 212681600 U CN212681600 U CN 212681600U CN 202020229410 U CN202020229410 U CN 202020229410U CN 212681600 U CN212681600 U CN 212681600U
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Abstract
The utility model provides a leadless piezoelectricity atomizing element of multilayer, including leadless piezoceramics ring of multilayer and metal substrate, leadless piezoceramics ring external diameter of multilayer is 3~30mm, and the internal diameter is 2~20mm, metal substrate is circular, and diameter 5~35mm, there is a circular shape micropore district in the metal substrate middle part, micropore district diameter is 2~20mm, micropore diameter is 1~20 mu m in the micropore district. The atomization element adopts piezoelectric ceramic materials without lead elements, such as niobate, titanate and the like, as base materials, is healthy and environment-friendly, and can solve the problems of environmental pollution and health hazard caused by lead-containing piezoelectric products; the piezoelectric ceramic with a multilayer structure is adopted, so that the impedance and the driving voltage of an element can be effectively reduced, and the atomization effect is enhanced.
Description
Technical Field
The utility model belongs to the technical field of liquid atomization and leadless piezoelectricity, concretely relates to adopt multilayer ceramic's leadless piezoelectricity atomizing component.
Background
The piezoelectric ultrasonic atomizer is an atomizing device with simple structure, low energy consumption and high efficiency, and has wide application in the field of small amount and trace atomization, and a humidifier and a medical atomization inhalation therapeutic apparatus are typical application examples thereof.
The core atomizing element of the existing piezoelectric ultrasonic atomizer is made of a lead zirconate titanate (PZT) based piezoelectric material, the mass percent of lead element in the material is about 70%, and the lead element can cause serious damage to the ecological environment in the processes of production, use and waste treatment. When the ultrasonic atomizer works, the lead-containing atomizing element can be directly contacted with liquid to be atomized, and lead in the lead-containing atomizing element can enter into the atomized particles and then be inhaled into the lung.
Lead is a toxic heavy metal which is extremely harmful to human bodies, and lead and compounds thereof can cause damage to multiple systems such as nerves, hematopoiesis, digestion, kidneys, cardiovascular and endocrine after entering the body, particularly for women and children, lead poisoning can cause deformity and damage to infant development, damage to the nervous system of the children, and cause brain tissue damage of the children and even cause lifelong disability. Related policies have been introduced in many countries to limit the use of lead in electronic products, such as the RoHS directive of the european union, which requires that the lead content in electronic components should not exceed 1000 ppm.
Disclosure of Invention
In view of the above problems, the utility model provides an adopt lead-free piezoelectric atomization component of multilayer ceramic, atomization component adopts piezoelectric ceramic materials that do not contain lead element such as niobate, titanate as base material, and healthy environmental protection can solve environmental pollution and the health hazard problem that lead piezoelectric product brought; the piezoelectric ceramic with a multilayer structure is adopted, so that the impedance and the driving voltage of an element can be effectively reduced, and the atomization effect is enhanced.
A multilayer lead-free piezo aerosol element comprising:
the multi-layer lead-free piezoelectric ceramic ring is 3-30mm in outer diameter and 2-20 mm in inner diameter, and is made of potassium sodium niobate-based or bismuth sodium titanate-based or barium titanate-based lead-free piezoelectric ceramic.
Further, the molar content of potassium sodium niobate and doped modified materials thereof in the potassium sodium niobate-based lead-free piezoelectric ceramic is 55-100%, wherein the mass percent of niobium element is 40-70%; the molar content of sodium bismuth titanate and doped modified materials thereof in the sodium bismuth titanate-based lead-free piezoelectric ceramic is 55-100%, wherein the mass percentage of bismuth element is 30-60%; the barium titanate-based lead-free piezoelectric ceramic contains 55-100% of barium titanate and doped modified materials thereof, wherein the mass percentage of barium is 40-70%.
Further, the multi-layer piezoelectric ceramic ring has a multi-layer structure, soThe multilayer structure comprises (2)n+ 1) laminated electroceramic monolayers, in whichnIs a positive integer and has at least 3 layers; the piezoelectric ceramic is characterized in that metal electrodes are arranged between the single piezoelectric ceramic layers, and the polarization directions of adjacent single piezoelectric ceramic layers are opposite to each other, so that a mechanical series-electrical parallel structure is formed, the impedance of an element is reduced, the amplitude of the element is increased, and the atomization effect is improved.
The metal substrate is used for transmitting the vibration energy of the piezoelectric ceramic to the liquid to be atomized, and is circular and 5-35 mm in diameter.
Furthermore, the metal substrate is made of stainless steel.
Furthermore, a circular micropore area is arranged in the middle of the metal substrate, the diameter of the micropore area is 3-20 mm, and the diameter of a micropore in the micropore area is 1-20 microns.
Furthermore, the working frequency of the multilayer lead-free piezoelectric atomization element is 50-500 kHz, and preferably, the working frequency is 130-150 kHz.
Further, the resonance impedance of the multilayer lead-free piezoelectric atomization element at the working frequency is 0.2-200 omega, and preferably, the resonance impedance is 1-30 omega.
Drawings
FIG. 1 is a schematic view of a multilayer lead-free piezoelectric microporous atomizing element.
Fig. 2 is a multilayer structure of the multilayer piezoelectric ceramic ring, in which thick solid lines are electrode layers.
Detailed Description
Specific examples of the present invention will be described in further detail below. It should be understood that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.
As shown in fig. 1, a multilayer lead-free piezoelectric atomization element includes:
the lead-free piezoelectric ceramic ring 10 is characterized in that the outer diameter of the lead-free piezoelectric ceramic ring 10 is 3-30mm, the inner diameter of the lead-free piezoelectric ceramic ring 10 is 2-20 mm, and the lead-free piezoelectric ceramic ring 10 is made of potassium sodium niobate-based or bismuth sodium titanate-based or barium titanate-based lead-free piezoelectric ceramic.
Further, the molar content of potassium sodium niobate and doped modified materials thereof in the potassium sodium niobate-based lead-free piezoelectric ceramic is 55-100%, wherein the mass percent of niobium element is 40-70%; the molar content of sodium bismuth titanate and doped modified materials thereof in the sodium bismuth titanate-based lead-free piezoelectric ceramic is 55-100%, wherein the mass percentage of bismuth element is 30-60%; the barium titanate-based lead-free piezoelectric ceramic contains 55-100% of barium titanate and doped modified materials thereof, wherein the mass percentage of barium is 40-70%.
Further, the multilayer piezoceramic ring 10 has a multilayer structure, as shown in FIG. 2, which comprises (2)n+ 1) laminated electroceramic monolayers, in whichnIs a positive integer and has at least 3 layers; the piezoelectric ceramic is characterized in that metal electrodes are arranged between the single piezoelectric ceramic layers, and the polarization directions of adjacent single piezoelectric ceramic layers are opposite to each other, so that a mechanical series-electrical parallel structure is formed, the impedance of an element is reduced, the amplitude of the element is increased, and the atomization effect is improved.
The metal substrate 20 is used for transmitting the vibration energy of the piezoelectric ceramics to the liquid to be atomized, and the metal substrate 20 is circular and has the diameter of 5-35 mm.
Further, the material of the metal substrate 20 is stainless steel.
Furthermore, a circular micropore area 30 is arranged in the middle of the metal substrate 20, the diameter of the micropore area 30 is 3-20 mm, and the diameter of micropores in the micropore area 30 is 1-20 μm.
Furthermore, the working frequency of the multilayer lead-free piezoelectric atomization element is 50-500 kHz, and preferably, the working frequency is 130-150 kHz.
Further, the resonance impedance of the multilayer lead-free piezoelectric atomization element at the working frequency is 0.2-200 omega, and preferably, the resonance impedance is 1-30 omega.
The above description is only for the preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention, and any modification, equivalent replacement or improvement within the spirit of the present invention is encompassed by the claims of the present invention.
Claims (4)
1. A multi-layer lead-free piezo aerosol element, comprising:
the lead-free piezoelectric ceramic ring comprises a plurality of layers, wherein the outer diameter of each layer of the lead-free piezoelectric ceramic ring is 3-30mm, and the inner diameter of each layer of the lead-free piezoelectric ceramic ring is 2-20 mm;
the metal substrate is circular, the diameter of the metal substrate is 5-35 mm, a circular micropore area is arranged in the middle of the metal substrate, the diameter of the micropore area is 2-20 mm, and the diameter of micropores in the micropore area is 1-20 microns.
2. A multi-layer lead-free piezoelectric atomization element in accordance with claim 1, wherein: the working frequency of the multilayer lead-free piezoelectric atomization element is 130-150 kHz; the resonance impedance under the working frequency is 1-30 omega.
3. A multi-layer lead-free piezoelectric atomization element in accordance with claim 1, wherein: the multilayer piezoelectric ceramic ring is of a multilayer structure, the multilayer structure comprises odd piezoelectric ceramic single layers and at least 3 layers; and metal electrodes are arranged between the piezoelectric ceramic single layers, and the polarization directions of the adjacent single layers of ceramics are opposite.
4. A multi-layer lead-free piezoelectric atomization element in accordance with claim 1, wherein: the multilayer lead-free piezoelectric ceramic ring is made of a potassium sodium niobate-based or bismuth sodium titanate-based or barium titanate-based piezoelectric ceramic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020229410.4U CN212681600U (en) | 2020-02-29 | 2020-02-29 | Multilayer leadless piezoelectric atomization element |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020229410.4U CN212681600U (en) | 2020-02-29 | 2020-02-29 | Multilayer leadless piezoelectric atomization element |
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| CN212681600U true CN212681600U (en) | 2021-03-12 |
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| CN202020229410.4U Active CN212681600U (en) | 2020-02-29 | 2020-02-29 | Multilayer leadless piezoelectric atomization element |
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