High-quality ternary ceramic piezoelectric material and preparation method and application thereof

Abstract

The invention discloses a high-quality ternary ceramic piezoelectric material as well as a preparation method and application thereof, the chemical formula of the material is (0.9-x) BiLaO3-xPbTbO3-0. 1PbCeO3, and x is more than or equal to 0.1 and less than or equal to 0.8; the preparation method of the material comprises the following steps: step 1, respectively weighing Bi2O3, PbO, La2O3, TbO2 and CeO2, mixing, carrying out wet ball milling, drying and grinding to obtain a mixture A; step 2, putting the mixture A into a muffle furnace, pre-sintering in an air atmosphere, and sequentially grinding, carrying out wet ball milling and drying to obtain powder B; step 3, adding an adhesive solution into the powder B, grinding and granulating to obtain a granular material; step 4, putting the granular material into a mold, and tabletting to obtain a ceramic blank body; 5, the ceramic blank is transferred to a muffle furnace and calcined in the air atmosphere, and the high-quality ternary ceramic piezoelectric material.The ternary ceramic piezoelectric material is prepared through a solid-phase reaction method, the process is simple, batch production is easy to achieve, and the synthesized ternary ceramic piezoelectric material has the high piezoelectric property, the high dielectric property and the low piezoelectric loss.

Description

Technical Field

[0001] This invention belongs to the field of aerospace sensor materials technology, specifically a high-quality ternary ceramic piezoelectric material, its preparation method, and its application. Background Technology

[0002] During service, aerospace components are subjected to complex external environmental factors, resulting in strain behavior that can easily lead to structural damage or even failure. Therefore, real-time monitoring of structural damage to aerospace components is crucial for ensuring their long-term stable operation.

[0003] Piezoelectric ceramic sensors are ideal materials for detecting strain-induced structural damage in on-orbit space devices due to their advantages such as fast response, high sensitivity, and ease of integration. However, traditional piezoelectric materials (ε-... r The sensitivity of 1000-3000 piezoelectric materials cannot meet the high sensitivity requirements of piezoelectric materials for aerospace devices. Therefore, there is an urgent need to develop high-quality piezoelectric ceramic materials to meet the pressing needs of on-orbit health checks for aerospace devices. Summary of the Invention

[0004] The purpose of this invention is to provide a high-quality ternary ceramic piezoelectric material, its preparation method and application. The synthesized ternary ceramic piezoelectric material has high piezoelectric properties, high dielectric properties and low piezoelectric loss.

[0005] This invention is achieved through the following technical solution: A high-quality ternary ceramic piezoelectric material with the chemical formula (0.9-x)BiLaO3-xPbTbO3-0.1PbCeO3, where 0.1 ≤ x ≤ 0.8; exhibiting trigonal, tetragonal, and quasi-isomorphic phase boundaries; initial dielectric constant ε r The initial piezoelectric coefficient is d, which is 4675~4760. 33 The dielectric constant is 1145~1180 pc / N, and the initial dielectric loss tanδ is 0.005~0.006; Under cobalt-60 radiation conditions, after 1 hour of irradiation, the piezoelectric coefficient d 33 The attenuation rate is less than 3.4%, and the dielectric constant ε r The attenuation rate is less than 2%, and the tanδ change rate of dielectric loss is not greater than 8%.

[0006] Furthermore, the chemical formula is 0.3BiLaO3-0.6PbTbO3-0.1PbCeO3, exhibiting quasi-isomorphic phase boundaries; its initial dielectric constant ε r The initial piezoelectric coefficient is 4760, and the initial piezoelectric coefficient is d. 33 The dielectric constant is 1180 pc / N, and the initial dielectric loss tanδ is 0.005. Under cobalt-60 radiation conditions, after 1 hour of irradiation, its piezoelectric coefficient d33 The attenuation rate is less than 3.3%, and the dielectric constant ε r The attenuation rate is less than 2%, and the tanδ change rate of dielectric loss is less than 6.7%.

[0007] Furthermore, Curie temperature T c The temperature is 650℃.

[0008] A method for preparing a high-quality ternary ceramic piezoelectric material includes the following steps: Step 1: (0.9-x)BiLaO3-xPbTbO3-0.1PbCeO3, where 0.1 ≤ x ≤ 0.8, weigh out Bi2O3, PbO, La2O3, TbO2 and CeO2 respectively, mix them, and then wet ball mill, dry and grind them in sequence to obtain mixture A; Step 2: Place mixture A into an alumina crucible, place the alumina crucible into a muffle furnace, and in an air atmosphere, first heat to 450°C at a heating rate of 3°C / min and calcine for 2 h, then heat to 800°C at a heating rate of 2°C / min and pre-calcine for 2 h, and then grind, wet ball mill and dry in sequence to obtain powder B. Step 3: According to the ratio of 3-4 drops of binder solution per 5 g of powder B, add 5% by mass binder solution to powder B, grind and granulate to obtain particulate material; Step 4: Place the granular material into the mold, press it into a sheet, and obtain a ceramic blank; Step 5: Transfer the ceramic preform to a muffle furnace and sinter it in air at a heating rate of 3℃ / min from room temperature to 450℃ for 2 hours. Then, sinter it at a heating rate of 3℃ / min to 1100~1200℃ for 2 hours to obtain a high-quality ternary ceramic piezoelectric material.

[0009] Furthermore, the wet ball milling process in steps 1 and 2 is as follows: according to the mass ratio of ball to material to liquid of 2:1:1, the weighed raw material is placed into a nylon ball milling jar, and anhydrous ethanol is added as the ball milling medium, and the mixture is ball milled for 2 hours.

[0010] Furthermore, the drying in steps 1 and 2 is carried out at 60~80℃ for 5 hours.

[0011] Furthermore, the adhesive solution in step 3 is a polyvinyl alcohol solution.

[0012] Furthermore, the particle size of the particulate material in step 3 is 0.25~1 μm. Furthermore, the ceramic blank in step 4 has a thickness of 1 mm and a diameter of 4-5 mm.

[0013] The application of a high-quality ternary ceramic piezoelectric material in piezoelectric ceramic sensors for online monitoring of structural damage to aerospace components during service.

[0014] The present invention has the following beneficial technical effects: This invention employs a solid-state reaction method to prepare ternary ceramic piezoelectric materials. The process is simple, easy to mass-produce, and the synthesized ternary ceramic piezoelectric materials possess high piezoelectric properties, high dielectric properties, and low piezoelectric loss. Specifically, the initial piezoelectric coefficient d... 33 = 1145~1180 pc / N, initial dielectric constant ε r = 4675~4760, initial dielectric loss tanδ = 0.005~0.006, under cobalt-60 radiation conditions, after 1 h of irradiation, the piezoelectric coefficient d 33 = 1108~1141 pc / N, dielectric constant ε r = 4586~4685, dielectric loss tanδ = 0.0054~0.0064. Calculations show that after 1 hour of irradiation, the piezoelectric decay is less than 3.4%, the dielectric performance decay is less than 2%, and the dielectric loss change rate is no greater than 8%. Therefore, when the ternary ceramic piezoelectric material prepared in this invention is applied to piezoelectric ceramic sensors, it can provide high-response and sensitive online monitoring of structural damage to aerospace components during service, meeting the urgent needs of on-orbit health checks for aerospace devices, and is of great significance for promoting the development of aerospace technology.

[0015] The ternary ceramic piezoelectric material prepared by this invention (0.3BiLaO3-0.6PbTbO3-0.1PbCeO3) simultaneously exhibits trigonal, tetragonal, and quasi-isomorphic phase boundaries, and its Curie temperature can reach 650℃, making it suitable for high-temperature operating environments in the aerospace field. Furthermore, after irradiation with cobalt-60 for 1 hour, the piezoelectric coefficient decay rate is less than 3.3%, the dielectric coefficient decay rate is less than 2%, and the dielectric loss change rate is less than 6.7%, further demonstrating high piezoelectric performance, high dielectric performance, and low piezoelectric loss. Attached Figure Description

[0016] Figure 1 This is a pre-firing temperature program control diagram for the preparation of ternary piezoelectric ceramic materials in Embodiment 1 of the present invention; Figure 2 This is a calcination temperature program control diagram for the preparation of ternary piezoelectric ceramic materials in Embodiment 1 of the present invention; Figure 3 The XRD pattern of the ternary piezoelectric ceramic material prepared in Example 1 of this invention; Figure 4 This is a calcination temperature program control diagram for the preparation of ternary piezoelectric ceramic materials in Embodiment 2 of the present invention; Figure 5 The XRD pattern of the ternary piezoelectric ceramic material prepared in Embodiment 2 of the present invention. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to specific embodiments. These descriptions are for explanation purposes only and are not intended to limit the scope of the invention.

[0018] Example 1 Step 1: According to the chemical formula (0.9-x)BiLaO3-xPbTbO3-0.1PbCeO3, where x = 0.2, weigh out Bi2O3, PbO, La2O3, TbO2 and CeO2 respectively, put them into a ball mill jar, add anhydrous ethanol as the ball milling medium according to the ball-to-liquid mass ratio of 2:1:1, ball mill for 2 h, put it into an oven, dry it at 60℃ for 5 h, and grind it into powder in a mortar to obtain mixture A; Step 2: Place mixture A into an alumina crucible, place the alumina crucible into a muffle furnace, and calcine it in air at a heating rate of 3℃ / min from room temperature to 450℃ for 2 hours. Then, heat it to 800℃ at a heating rate of 2℃ / min and pre-calcine it for 2 hours. Next, grind it into powder and place it into a ball mill jar. Add anhydrous ethanol as the ball milling medium according to a ball-to-liquid mass ratio of 2:1:1. Ball mill for 2 hours, place it in an oven, and dry it at 60℃ for 5 hours to obtain powder B. Step 3: Add 3 drops of polyvinyl alcohol solution to powder B at a ratio of 5% by mass, grind and granulate to obtain particulate material with a particle size of 0.25~1 μm. Step 4: Place 0.6 g of granular material into a mold and press it into a ceramic blank with a thickness of 1 mm and a diameter of 5 mm at 40 MPa. Step 5: Transfer the ceramic preform to a muffle furnace and sinter it in air at a heating rate of 3℃ / min from room temperature to 450℃ for 2 hours. Then, heat it to 1100℃ at a heating rate of 3℃ / min and sinter it for 2 hours to obtain a high-quality ternary ceramic piezoelectric material.

[0019] The performance of the high-quality ternary ceramic piezoelectric material prepared in Example 1 was tested, and the results are as follows: initial piezoelectric coefficient d 33 =1180 pc / N, initial dielectric constant ε r = 4760, initial dielectric loss tanδ = 0.005; under cobalt-60 radiation conditions, after 1 h of irradiation, the piezoelectric coefficient d 33 = 1141 pc / N, dielectric constant ε r= 4685, dielectric loss tanδ = 0.0054; calculations show that the piezoelectric attenuation is less than 3.31%, the dielectric performance attenuation is less than 2%, and the dielectric loss change rate is 8%.

[0020] Figure 1 The pre-calcination temperature program control chart for step 2 in Example 1 is shown. It can be seen that in Example 1, the temperature is first gradually increased from room temperature to 450°C at a heating rate of 3°C / min for 150 min, and calcined for 2 h. Then, the temperature is increased from 450°C to 800°C at a heating rate of 2°C / min for 175 min, and pre-calcined for 2 h. Finally, it is naturally cooled to obtain ternary mixed powder.

[0021] Figure 2 The calcination temperature program control chart for step 5 in Example 1 is shown. It can be seen that in Example 1, the temperature is first increased from room temperature to 450°C at a heating rate of 3°C / min for 150 min, and sintered for 2 h. Then, the temperature is increased from 450°C to 1100°C at a heating rate of 3°C / min for 217 min, and sintered for 2 h to obtain a high-quality ternary ceramic piezoelectric material.

[0022] Example 2 Step 1: Weigh out Bi2O3, PbO, La2O3, TbO2 and CeO2 according to the chemical formula (0.9-x)BiLaO3-xPbTbO3-0.1PbCeO3, where x = 0.6, and put them into a ball mill jar. Add anhydrous ethanol to the ball mill jar as the ball milling medium according to the ball-to-liquid mass ratio of 2:1:1. Ball mill for 2 h, put it in an oven and dry it at 70 ℃ for 5 h. Then put it in a mortar and grind it into powder to obtain mixture A. Step 2: Place mixture A into an alumina crucible, place the alumina crucible into a muffle furnace, and calcine it to 450°C for 2 hours in an air atmosphere at a heating rate of 3°C / min. Then, heat it to 800°C for 2 hours at a heating rate of 2°C / min. Next, grind it into powder and place it into a ball mill jar. Add anhydrous ethanol as the ball milling medium according to a ball-to-liquid mass ratio of 2:1:1. Ball mill for 2 hours, place it in an oven, and dry it at 70°C for 5 hours to obtain powder B. Step 3: Add 3 drops of polyvinyl alcohol solution to powder B at a ratio of 5% by mass, grind and granulate to obtain particulate material with a particle size of 0.25~1 μm. Step 4: Place 0.6 g of granular material into a mold and press it into a ceramic blank with a thickness of 1 mm and a diameter of 5 mm at 40 MPa. Step 5: Transfer the ceramic preform to a muffle furnace and sinter it in air at a heating rate of 3℃ / min from room temperature to 450℃ for 2 hours. Then, sinter it at a heating rate of 3℃ / min to 1150℃ for 2 hours to obtain a high-quality ternary ceramic piezoelectric material.

[0023] The performance of the high-quality ternary ceramic piezoelectric material prepared in Example 2 was tested, and the results are as follows: initial piezoelectric coefficient d 33 =1145 pc / N, initial dielectric constant ε r = 4675, initial dielectric loss tanδ = 0.006; under cobalt-60 radiation conditions, after 1 h of irradiation, the piezoelectric coefficient d 33 = 1108 pc / N, dielectric constant ε r = 4586, dielectric loss tanδ = 0.0064; calculations show that the piezoelectric attenuation is less than 3.3%, the dielectric performance attenuation is less than 2%, and the dielectric loss change rate is less than 6.7%.

[0024] Figure 4 The calcination temperature program control chart for step 5 in Example 2 is shown. It can be seen that in Example 2, the temperature is first raised from room temperature to 450°C at a heating rate of 3°C / min for 150 min, and sintered for 2 h. Then, the temperature is raised to 1150°C at a heating rate of 3°C / min for 234 min, and sintered for 2 h to obtain a high-quality ternary ceramic piezoelectric material.

[0025] Example 3 Step 1: Weigh out Bi2O3, PbO, La2O3, TbO2 and CeO2 according to the chemical formula (0.9-x)BiLaO3-xPbTbO3-0.1PbCeO3, where x = 0.1, and put them into a ball mill jar. Add anhydrous ethanol to the ball mill jar as the ball milling medium according to the ball-to-liquid mass ratio of 2:1:1. Ball mill for 2 h, put it in an oven and dry it at 80℃ for 5 h. Then put it in a mortar and grind it into powder to obtain mixture A. Step 2: Place mixture A into an alumina crucible, place the alumina crucible into a muffle furnace, and calcine it to 450°C for 2 hours in an air atmosphere at a heating rate of 3°C / min. Then, heat it to 800°C for 2 hours at a heating rate of 2°C / min. Next, grind it into powder and place it into a ball mill jar. Add anhydrous ethanol as the ball milling medium according to a ball-to-liquid mass ratio of 2:1:1. Ball mill for 2 hours, place it in an oven, and dry it at 80°C for 5 hours to obtain powder B. Step 3: Add 3 drops of polyvinyl alcohol solution to powder B at a ratio of 5% by mass, grind and granulate to obtain particulate material with a particle size of 0.25~1 μm. Step 4: Place 0.6 g of granular material into a mold and press it into a ceramic blank with a thickness of 1 mm and a diameter of 5 mm under 40 MPa. Step 5: Transfer the ceramic preform to a muffle furnace and sinter it in air at a heating rate of 3℃ / min from room temperature to 450℃ for 2 hours. Then, sinter it at a heating rate of 3℃ / min to 1200℃ for 2 hours to obtain a high-quality ternary ceramic piezoelectric material.

[0026] Example 4 Step 1: Weigh out Bi2O3, PbO, La2O3, TbO2 and CeO2 according to the chemical formula (0.9-x)BiLaO3-xPbTbO3-0.1PbCeO3, where x = 0.4, and put them into a ball mill jar. Add anhydrous ethanol as the ball milling medium according to the ball-to-liquid mass ratio of 2:1:1. Ball mill for 2 h, put it in an oven and dry it at 65℃ for 5 h. Then grind it into powder in a mortar to obtain mixture A. Step 2: Place mixture A into an alumina crucible, place the alumina crucible into a muffle furnace, and calcine it to 450°C for 2 hours in an air atmosphere at a heating rate of 3°C / min. Then, heat it to 800°C for 2 hours at a heating rate of 2°C / min. Next, grind it into powder and place it into a ball mill jar. Add anhydrous ethanol as the ball milling medium according to a ball-to-liquid mass ratio of 2:1:1. Ball mill for 2 hours, place it in an oven, and dry it at 65°C for 5 hours to obtain powder B. Step 3: Add 5% polyvinyl alcohol solution to powder B according to the ratio of 4 drops of polyvinyl alcohol solution per 5 g of powder B, grind and granulate to obtain particulate material with a particle size of 0.25~1 μm. Step 4: Place 0.6 g of granular material into a mold and press it into a ceramic blank with a thickness of 1 mm and a diameter of 4 mm under 40 MPa. Step 5: Transfer the ceramic preform to a muffle furnace and sinter it in air at a heating rate of 3℃ / min from room temperature to 450℃ for 2 hours. Then, sinter it at a heating rate of 3℃ / min to 1200℃ for 2 hours to obtain a high-quality ternary ceramic piezoelectric material.

[0027] Example 5 Step 1: Weigh out Bi2O3, PbO, La2O3, TbO2 and CeO2 according to the chemical formula (0.9-x)BiLaO3-xPbTbO3-0.1PbCeO3, where x = 0.5, and place them into a ball mill jar. Add anhydrous ethanol to the ball mill jar as the ball milling medium according to the ball-to-liquid mass ratio of 2:1:1. Ball mill for 2 h, place in an oven and dry at 75℃ for 5 h. Grind into powder in a mortar to obtain mixture A. Step 2: Place mixture A into an alumina crucible, place the alumina crucible into a muffle furnace, and calcine it to 450°C for 2 hours in an air atmosphere at a heating rate of 3°C / min. Then, heat it to 800°C for 2 hours at a heating rate of 2°C / min. Next, grind it into powder and place it into a ball mill jar. Add anhydrous ethanol as the ball milling medium according to a ball-to-liquid mass ratio of 2:1:1. Ball mill for 2 hours, place it in an oven, and dry it at 75°C for 5 hours to obtain powder B. Step 3: Add 5% polyvinyl alcohol solution to powder B according to the ratio of 4 drops of polyvinyl alcohol solution per 5 g of powder B, grind and granulate to obtain particulate material with a particle size of 0.25~1 μm. Step 4: Place 0.6 g of granular material into a mold and press it into a ceramic blank with a thickness of 1 mm and a diameter of 4 mm under 40 MPa. Step 5: Transfer the ceramic preform to a muffle furnace and sinter it in air at a heating rate of 3℃ / min from room temperature to 450℃ for 2 hours. Then, sinter it at a heating rate of 3℃ / min to 1100℃ for 2 hours to obtain a high-quality ternary ceramic piezoelectric material.

[0028] Example 6 Step 1: Weigh out Bi2O3, PbO, La2O3, TbO2 and CeO2 according to the chemical formula (0.9-x)BiLaO3-xPbTbO3-0.1PbCeO3, where x = 0.8, and place them into a ball mill jar. Add anhydrous ethanol to the ball mill jar as the ball milling medium according to the ball-to-liquid mass ratio of 2:1:1. Ball mill for 2 h, place in an oven and dry at 80℃ for 5 h. Grind into powder in a mortar to obtain mixture A. Step 2: Place mixture A into an alumina crucible, place the alumina crucible into a muffle furnace, and calcine it to 450°C for 2 hours in an air atmosphere at a heating rate of 3°C / min. Then, heat it to 800°C for 2 hours at a heating rate of 2°C / min. Next, grind it into powder and place it into a ball mill jar. Add anhydrous ethanol as the ball milling medium according to a ball-to-liquid mass ratio of 2:1:1. Ball mill for 2 hours, place it in an oven, and dry it at 80°C for 5 hours to obtain powder B. Step 3: Add 5% polyvinyl alcohol solution to powder B according to the ratio of 4 drops of polyvinyl alcohol solution per 5 g of powder B, grind and granulate to obtain particulate material with a particle size of 0.25~1 μm. Step 4: Place 0.6 g of granular material into a mold and press it into a ceramic blank with a thickness of 1 mm and a diameter of 4 mm under 40 MPa. Step 5: Transfer the ceramic preform to a muffle furnace and sinter it in air at a heating rate of 3℃ / min from room temperature to 450℃ for 2 hours. Then, sinter it at a heating rate of 3℃ / min to 1150℃ for 2 hours to obtain a high-quality ternary ceramic piezoelectric material.

[0029] Figure 3 and Figure 5 The XRD patterns of the high-quality ternary ceramic piezoelectric materials prepared in Examples 1 and 2 are shown respectively. It can be seen that: compared with Figure 3 In other words, Figure 5 At the position of 2θ = 45°, the diffraction peak changes, shifting from a trigonal phase... <200> The diffraction peaks of the crystal planes transformed into those of the tetragonal phase. <002> and <200> The diffraction peaks on the crystal planes indicate that as the PbTbO3 content increases, the trigonal phase is transforming into the tetragonal phase, and there is a quasi-isomorphic phase boundary.

Claims

1. A high-quality ternary ceramic piezoelectric material, characterized in that, The chemical formula is (0.9-x)BiLaO3-xPbTbO3-0.1PbCeO3, where 0.1 ≤ x ≤ 0.8; it contains trigonal, tetragonal, and quasi-isomorphic phase boundaries; the initial dielectric constant ε r The initial piezoelectric coefficient is d, which is 4675~4760. 33 The dielectric constant is 1145~1180 pc / N, and the initial dielectric loss tanδ is 0.005~0.006; Under cobalt-60 radiation conditions, after 1 hour of irradiation, the piezoelectric coefficient d 33 The attenuation rate is less than 3.4%, and the dielectric constant ε r The attenuation rate is less than 2%, and the tanδ change rate of dielectric loss is not greater than 8%.

2. The high-quality ternary ceramic piezoelectric material according to claim 1, characterized in that, The chemical formula is 0.3BiLaO3-0.6PbTbO3-0.1PbCeO3, and it exhibits quasi-isomorphic phase boundaries; its initial dielectric constant ε r The initial piezoelectric coefficient is 4760, and the initial piezoelectric coefficient is d. 33 The dielectric constant is 1180 pc / N, and the initial dielectric loss tanδ is 0.

005. Under cobalt-60 radiation conditions, after 1 hour of irradiation, its piezoelectric coefficient d 33 The attenuation rate is less than 3.3%, and the dielectric constant ε r The attenuation rate is less than 2%, and the tanδ change rate of dielectric loss is less than 6.7%.

3. The high-quality ternary ceramic piezoelectric material according to claim 2, characterized in that, Curie temperature T c It is 650℃.

4. A method for preparing a high-quality ternary ceramic piezoelectric material as described in any one of claims 1 to 3, characterized in that, Includes the following steps: Step 1: (0.9-x)BiLaO3-xPbTbO3-0.1PbCeO3, where 0.1 ≤ x ≤ 0.8, weigh out Bi2O3, PbO, La2O3, TbO2 and CeO2 respectively, mix them, and then wet ball mill, dry and grind them in sequence to obtain mixture A; Step 2: Place mixture A into an alumina crucible, place the alumina crucible into a muffle furnace, and in an air atmosphere, first heat to 450°C at a heating rate of 3°C / min and calcine for 2 h, then heat to 800°C at a heating rate of 2°C / min and pre-calcine for 2 h, and then grind, wet ball mill and dry in sequence to obtain powder B. Step 3: According to the ratio of 3-4 drops of binder solution per 5 g of powder B, add 5% by mass binder solution to powder B, grind and granulate to obtain particulate material; Step 4: Place the granular material into the mold, press it into a sheet, and obtain a ceramic blank; Step 5: Transfer the ceramic preform to a muffle furnace and sinter it in air at a heating rate of 3℃ / min from room temperature to 450℃ for 2 hours. Then, sinter it at a heating rate of 3℃ / min to 1100~1200℃ for 2 hours to obtain a high-quality ternary ceramic piezoelectric material.

5. The method for preparing high-quality ternary ceramic piezoelectric materials according to claim 4, characterized in that, The wet ball milling process in steps 1 and 2 is as follows: according to the mass ratio of ball to material to liquid of 2:1:1, the weighed raw material is put into a nylon ball milling jar, and anhydrous ethanol is added as the ball milling medium, and the ball milling is carried out for 2 hours.

6. The method for preparing high-quality ternary ceramic piezoelectric materials according to claim 4, characterized in that, The drying in steps 1 and 2 is carried out at 60~80℃ for 5 hours.

7. The method for preparing high-quality ternary ceramic piezoelectric materials according to claim 4, characterized in that, The adhesive solution in step 3 is a polyvinyl alcohol solution.

8. The method for preparing high-quality ternary ceramic piezoelectric materials according to claim 4, characterized in that, The particle size of the particulate material in step 3 is 0.25~1 μm.

9. The method for preparing high-quality ternary ceramic piezoelectric materials according to claim 4, characterized in that, The ceramic blank in step 4 has a thickness of 1 mm and a diameter of 4-5 mm.

10. The application of a high-quality ternary ceramic piezoelectric material as described in any one of claims 1 to 3 in a piezoelectric ceramic sensor, characterized in that, Used for online monitoring of structural damage to aerospace components during service.

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