High-entropy perovskite oxide doped ceramic and preparation method thereof

Abstract

This invention discloses a high-entropy perovskite oxide-doped ceramic with the stoichiometric formula (1- x )Ca 0.5 Sr 0.5 TiO3- x NBBSC, 0.05≤ x ≤0.2. The preparation method is as follows: Step 1, the raw powder is prepared according to Ca... 0.5 Sr 0.5 The molar mass percentages of TiO3 and NBBSC were weighed and mixed to form mixed powder A and mixed powder B; in step 2, mixed powder A and mixed powder B were ball-milled, dried, and pre-calcined respectively to obtain Ca 0.5 Sr 0.5 TiO3 powder and NBBSC powder; Step 3, Ca 0.5 Sr 0.5 TiO3 powder and NBBSC powder were mixed according to (1- x )Ca 0.5 Sr 0.5 TiO3- x Weigh, mix, ball-mill, dry, and sieve the NBBSC chemical formula by molar mass percentage to obtain mixed powder C; Step 4, press mixed powder C into a green body and sinter it to obtain (1- x )Ca 0.5 Sr 0.5 TiO3- x NBBSC ceramics. This invention utilizes linear dielectric Ca... 0.5 Sr 0.5 High-entropy perovskite oxide NBBSC is introduced into the TiO3 matrix, and NBBSC enters the Ca in a solid solution form. 0.5 Sr 0.5 TiO3 crystal lattice forms a single solid solution, thereby modifying and improving the dielectric properties of ceramics, significantly increasing the breakdown field strength of ceramics, and enabling ceramics to obtain high energy storage density and high energy storage efficiency.

Description

Technical Field

[0001] This invention relates to the field of high energy storage medium ceramics technology, specifically to a high-entropy perovskite oxide-doped ceramic and its preparation method. Background Technology

[0002] Ceramic capacitors, with their chemical-free energy storage and release mechanism, enable instantaneous discharge. They possess ultra-high power density, rapid charge / discharge capabilities, and a high relative permittivity, making them popular in many promising applications. However, further improvements in energy density and breakdown strength are mutually constrained. Therefore, maintaining a stable permittivity while enhancing breakdown strength is of great significance for the application and development of ceramic capacitors.

[0003] Ca 0.5 Sr 0.5 The research value of TiO3 ceramics mainly stems from its excellent properties as a linear dielectric and its low temperature coefficient of change. Through its linear dielectric properties, high breakdown strength, and tunable modification strategies, it has become a strong candidate material for next-generation high-performance, lead-free, and highly reliable ceramic capacitors. The emerging material design theory of "entropy engineering," by controlling configurational entropy, regulates the degree of lattice distortion and disorder within the material, opening new paths for creating ceramic materials with new structures and properties. The inherent strong lattice distortion and high structural disorder of high-entropy systems can bring unique properties such as high mechanical properties, high resistivity, and low thermal conductivity. These properties have a potentially significant impact on the performance regulation and innovation of dielectric ceramics. Therefore, introducing novel high-entropy perovskite oxides into linear Ca... 0.5 Sr 0.5 TiO3 ceramics, by synergistically utilizing the advantages of both materials, can suppress the electronic conductivity behavior of linear ceramics under high electric fields, thereby further improving energy storage density and efficiency. This is an important topic worthy of in-depth exploration. Summary of the Invention

[0004] The purpose of this invention is to provide a high-entropy perovskite oxide-doped ceramic and its preparation method, so that the ceramic capacitor has both high energy density and excellent breakdown strength.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-entropy perovskite oxide-doped ceramic with the stoichiometric formula (1- x )Ca 0.5 Sr 0.5 TiO3- x NBBSC, where 0.05≤ x ≤0.2.

[0007] The method for preparing this high-entropy perovskite oxide-doped ceramic includes the following steps:

[0008] Step 1, mix the raw CaCO3, SrCO3 and TiO2 powders according to Ca 0.5 Sr 0.5 Weigh and mix the TiO3 chemical formula by molar mass percentage to form mixed powder A; then, combine the original powders of Na2CO3, Bi2O3, BaCO3, SrCO3, CaCO3, and TiO2 according to NBBSC (i.e., Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 Weigh and mix the molar mass percentage of the chemical formula of TiO3 to form mixed powder B;

[0009] Step 2: Mixed powder A and mixed powder B are ball-milled separately. The ball-milled slurry is then dried and pre-calcined to obtain Ca. 0.5 Sr 0.5 TiO3 powder and NBBSC powder;

[0010] Step 3, take the Ca obtained in step 2 0.5 Sr 0.5 TiO3 powder and NBBSC powder, according to (1- x )Ca 0.5 Sr 0.5 TiO3- x NBBSC (where 0.05≤ x ≤0.2) Weigh and mix the chemical formula by molar mass percentage, then ball mill; after ball milling, dry the slurry and sieve to obtain mixed powder C;

[0011] Step 4: Press the mixed powder C into a green body, and sinter the green body to obtain (1- x )Ca 0.5 Sr 0.5 TiO3- x NBBSC ceramics.

[0012] Furthermore, the raw powders in step 1 are of chemical purity or higher.

[0013] Further, the ball milling process of mixed powder A in step 2 is as follows: the mass ratio of mixed powder A: zirconia balls: deionized water is 1:5:(1-1.2), the mass of the zirconia balls is proportioned according to a diameter of 10mm:6mm:3mm=5:3:1, the ball milling speed is 400rpm, and the ball milling time is 6-10h.

[0014] Furthermore, in step 2, the drying temperature of the slurry after ball milling of mixed powder A is 80-100℃, and the drying time is 18-24h; the pre-calcination temperature is 1150-1200℃, and the pre-calcination time is 2-3h.

[0015] Further, the ball milling process of mixed powder B in step 2 is as follows: the mass ratio of mixed powder B: zirconia balls: deionized water is 1:5:(0.8-1.2), the mass of the zirconia balls is proportioned according to a diameter ratio of 6mm:3mm=5:2, the ball milling speed is 400rpm, and the ball milling time is 8-10h.

[0016] Furthermore, in step 2, the drying temperature of the slurry after ball milling of mixed powder B is 80-100℃, and the drying time is 20-24h; the pre-calcination temperature is 900℃, and the pre-calcination time is 2-3h.

[0017] Furthermore, in step 3, Ca 0.5 Sr 0.5 The process of ball milling TiO3 powder and NBBSC powder is as follows: the mass ratio of the two mixed powders, zirconia balls, and deionized water is 1:5:(0.8-1.2), the mass of zirconia balls is proportioned according to a diameter ratio of 6mm:3mm=5:2, the ball milling speed is 400rpm, and the ball milling time is 10-12h.

[0018] Furthermore, in step 3, the drying temperature of the ball-milled slurry is 80-100℃, and the drying time is 20-24h; a 120-mesh sieve is used for sieving.

[0019] Furthermore, in step 4, the pressing is carried out using cold isostatic pressing at a pressure of 100 MPa.

[0020] Furthermore, in step 4, the sintering temperature is 1380-1400℃ and the sintering time is 2-4h.

[0021] Compared with the prior art, the present invention has the following beneficial technical effects:

[0022] 1. The (1- x )Ca 0.5 Sr 0.5 TiO3- x NBBSC ceramic materials, through linear dielectric Ca 0.5 Sr 0.5 High-entropy perovskite oxide (NBBSC) is introduced into the TiO3 matrix in a solid solution form within Ca. 0.5 Sr 0.5 The TiO3 lattice forms a single solid solution, thereby modifying and improving the dielectric properties of the ceramic material. The dielectric constant and dielectric loss of the ceramic material exhibit good stability at different test frequencies.

[0023] 2. The (1- x )Ca 0.5 Sr 0.5 TiO3- x By introducing the NBBSC system, NBBSC ceramic materials suppress the electronic conductivity behavior of linear dielectrics under high electric fields, significantly improving the breakdown field strength of the ceramic system. As a result, the ceramic system achieves high energy storage density and high energy storage efficiency.

[0024] 3. The high-entropy perovskite oxide-doped ceramics prepared by this invention possess excellent dielectric properties and breakdown field strength, as well as high energy storage density and high energy storage efficiency. The preparation process is simple, and the technical solution is green and energy-saving. Therefore, it can be applied to fields with higher requirements for dielectric properties, such as high-energy-storage ceramic capacitors, high-performance multilayer ceramic capacitors (MLCCs), microwave communication devices, tunable devices, etc. Attached Figure Description

[0025] Figure 1 Examples 1-4 (1- x )Ca 0.5 Sr 0.5 TiO3- x XRD patterns of NBBSC ceramics.

[0026] Figure 2 Examples 1-4 (1- x )Ca 0.5 Sr 0.5 TiO3- x Curves showing the dielectric constant and dielectric loss of NBBSC ceramics as a function of frequency.

[0027] Figure 3 Examples 1-4 (1- x )Ca 0.5 Sr 0.5 TiO3- x NBBSC ceramics P - E curve. Detailed Implementation

[0028] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings:

[0029] This invention discloses a high-entropy perovskite oxide-doped ceramic, whose stoichiometric formula is (1- x )Ca 0.5 Sr 0.5 TiO3- x NBBSC, where 0.05≤ x ≤0.2. This invention utilizes a linear dielectric Ca... 0.5Sr 0.5 Introducing high-entropy perovskite oxide NBBSC (i.e., Na+) into the TiO3 matrix 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 TiO3), NBBSC enters Ca in solid solution form 0.5 Sr 0.5 The TiO3 lattice forms a single solid solution, thereby modifying and improving the dielectric properties of the material. At the same time, the introduction of the NBBSC system suppresses the electronic conductivity behavior of linear dielectrics under high electric fields, significantly improving the breakdown field strength of the ceramic system. Therefore, the ceramic system achieves high energy storage density and efficiency.

[0030] The specific preparation method of the high-entropy perovskite oxide-doped ceramic is as follows:

[0031] Step 1: Weigh and mix the ingredients to obtain mixed powder A and mixed powder B respectively.

[0032] The raw powders of CaCO3, SrCO3, and TiO2 were prepared according to the following formula: 0.5 Sr 0.5 Weigh and mix the TiO3 chemical formula by molar mass percentage to form mixed powder A; then, combine the original powders of Na2CO3, Bi2O3, BaCO3, SrCO3, CaCO3, and TiO2 according to NBBSC (i.e., Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 Weigh and mix the TiO3 (chemical formula) by molar mass percentage to form mixed powder B. All the original powders mentioned above are of chemical purity or higher.

[0033] Step 2: Mixed powder A and mixed powder B are ball-milled, dried, and pre-calcined respectively to obtain Ca. 0.5 Sr 0.5 TiO3 powder and NBBSC powder:

[0034] Mixed powder A was ball-milled. The mass ratio of mixed powder A:zirconia balls:deionized water was 1:5:(1-1.2). The zirconia balls were proportioned according to a diameter ratio of 10mm:6mm:3mm = 5:3:1. The ball milling speed was 400 rpm, and the milling time was 6-10 hours. After ball milling, the slurry was dried at 80-100℃ for 18-24 hours. The dried mixed powder A was then pre-calcined at 1150-1200℃ for 2-3 hours to obtain the main crystalline phase Ca. 0.5 Sr 0.5 TiO3 powder;

[0035] Mixed powder B was ball-milled. The mass ratio of mixed powder B, zirconia balls, and deionized water was 1:5:(0.8-1.2). The zirconia balls were mixed in a ratio of 6mm:3mm in diameter = 5:2. The ball milling speed was 400 rpm and the ball milling time was 8-10 hours. After ball milling, the slurry was dried at 80-100℃ for 20-24 hours. The dried mixed powder B was then pre-calcined at 900℃ for 2-3 hours to obtain NBBSC powder.

[0036] Step 3: Weigh, mix, ball mill, dry, and sieve to obtain mixed powder C:

[0037] The Ca obtained from pre-calcination 0.5 Sr 0.5 TiO3 powder and NBBSC powder, according to (1- x )Ca 0.5 Sr 0.5 TiO3- x NBBSC (where 0.05≤ x ≤0.2) The molar mass percentage of the chemical formula is weighed and mixed, and then ball-milled; the mass ratio of the two mixed powders, zirconia balls and deionized water, is 1:5:(0.8-1.2), and the mass of zirconia balls is proportioned according to a diameter of 6mm:3mm=5:2. The ball milling speed is 400rpm and the ball milling time is 10-12h; the slurry after ball milling is dried at 80-100℃ for 20-24h, and then passed through a 120-mesh sieve to obtain mixed powder C.

[0038] Step 4: Pressing the green body and sintering the ceramic:

[0039] The sieved mixed powder C was pressed into a green body by cold isostatic pressing, with the pressure controlled at 100 MPa. The prepared green body sample was placed in a sagger, preferably an alumina sagger, with a zirconia pad at the bottom. The sagger was placed in a high-temperature box furnace and sintered at 1380-1400℃ for 2-4 hours to obtain (1- x )Ca 0.5 Sr 0.5 TiO3- x NBBSC [i.e. (1- x )Ca 0.5 Sr 0.5 TiO3- x Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 TiO3 ceramics.

[0040] All the raw materials used above were purchased from commercial sources.

[0041] The technical solution of the present invention will be further described below through specific embodiments.

[0042] Example 1

[0043] x =0.05.

[0044] When ball milling mixed powder A, the mass ratio of mixed powder A:zirconia balls:deionized water is 1:5:1, the ball milling time is 6 hours, the slurry after ball milling is dried at 80℃ for 18 hours, and pre-calcined at 1150℃ for 2 hours to obtain the main crystalline phase Ca. 0.5 Sr 0.5 TiO3 powder.

[0045] When ball milling mixed powder B, the mass ratio of mixed powder B:zirconia balls:deionized water is 1:5:0.8, the ball milling time is 8h, the slurry after ball milling is dried at 80℃ for 20h, and pre-calcined at 900℃ for 3h to obtain NBBSC powder.

[0046] Ball mill Ca 0.5 Sr 0.5 When TiO3 and NBBSC are mixed into powder, the mass ratio of the two mixed powders, zirconium oxide balls and deionized water, is 1:5:1. The ball milling time is 10 hours. After ball milling, the slurry is dried at 80°C for 20 hours to obtain mixed powder C.

[0047] During sintering, the sintering temperature was 1400℃, and the holding time was 2 hours, yielding 0.95Ca. 0.5 Sr 0.5 TiO3-0.05NBBSC ceramic.

[0048] Example 2

[0049] x =0.10.

[0050] When ball milling mixed powder A, the mass ratio of mixed powder A:zirconia balls:deionized water is 1:5:1, the ball milling time is 8 hours, the slurry after ball milling is dried at 90℃ for 20 hours, and pre-calcined at 1200℃ for 2.5 hours to obtain the main crystalline phase Ca. 0.5 Sr 0.5 TiO3 powder.

[0051] When ball milling mixed powder B, the mass ratio of mixed powder B:zirconia balls:deionized water is 1:5:1, the ball milling time is 10h, the slurry after ball milling is dried at 90℃ for 20h, and pre-calcined at 900℃ for 2.5h to obtain NBBSC powder.

[0052] Ball mill Ca 0.5 Sr 0.5When TiO3 and NBBSC are mixed into powder, the mass ratio of the two mixed powders, zirconium oxide balls and deionized water, is 1:5:0.8. The ball milling time is 12 hours, and the slurry after ball milling is dried at 90°C for 20 hours to obtain mixed powder C.

[0053] During sintering, the sintering temperature was 1390℃, and the holding time was 3.5h, yielding 0.9Ca. 0.5 Sr 0.5 TiO3-0.1NBBSC ceramics.

[0054] Example 3

[0055] x =0.15.

[0056] When ball milling mixed powder A, the mass ratio of mixed powder A:zirconia balls:deionized water is 1:5:1.1, and the ball milling time is 10 hours. After ball milling, the slurry is dried at 100℃ for 22 hours and pre-calcined at 1175℃ for 3 hours to obtain the main crystalline phase Ca. 0.5 Sr 0.5 TiO3 powder.

[0057] When ball milling mixed powder B, the mass ratio of mixed powder B:zirconia balls:deionized water is 1:5:1.1, the ball milling time is 10h, the slurry after ball milling is dried at 100℃ for 22h, and pre-calcined at 900℃ for 2.5h to obtain NBBSC powder.

[0058] Ball mill Ca 0.5 Sr 0.5 When TiO3 and NBBSC are mixed into powder, the mass ratio of the two mixed powders, zirconium oxide balls and deionized water, is 1:5:1.1. The ball milling time is 12 hours. After ball milling, the slurry is dried at 100°C for 22 hours to obtain mixed powder C.

[0059] During sintering, the sintering temperature was 1390℃, and the holding time was 4 hours, yielding 0.85Ca. 0.5 Sr 0.5 TiO3-0.15NBBSC ceramics.

[0060] Example 4

[0061] x =0.20.

[0062] When ball milling mixed powder A, the mass ratio of mixed powder A:zirconia balls:deionized water is 1:5:1.2, the ball milling time is 9 hours, the slurry after ball milling is dried at 100℃ for 24 hours, and pre-calcined at 1200℃ for 3 hours to obtain the main crystalline phase Ca. 0.5 Sr 0.5 TiO3 powder.

[0063] When ball milling mixed powder B, the mass ratio of mixed powder B:zirconia balls:deionized water is 1:5:1.2, the ball milling time is 9h, the slurry after ball milling is dried at 100℃ for 24h, and pre-calcined at 900℃ for 2h to obtain NBBSC powder.

[0064] Ball mill Ca 0.5 Sr 0.5 When TiO3 and NBBSC are mixed into powder, the mass ratio of the two mixed powders (zirconia balls and deionized water) is 1:5:1.2, the ball milling time is 11 h, and the slurry after ball milling is dried at 100℃ for 24 h to obtain mixed powder C.

[0065] During sintering, the sintering temperature was 1380℃, and the holding time was 3 hours, yielding 0.8Ca. 0.5 Sr 0.5 TiO3-0.2NBBSC ceramics.

[0066] The high-entropy perovskite oxide-doped ceramics prepared in Examples 1-4 were subjected to xRD analysis, and the results were obtained. Figure 1 of (1- x )Ca 0.5 Sr 0.5 TiO3- x NBBSC (0.05≤ x XRD pattern of ceramics ≤0.2). From Figure 1 It can be seen that all ceramic samples exhibit a typical single ABO3 type perovskite structure, indicating that NBBSC enters Ca in a solid solution form. 0.5 Sr 0.5 The TiO3 lattice forms a single solid solution. NBBSC does not exist as a second phase, but is completely integrated into Ca in a solid solution form. 0.5 Sr 0.5 The TiO3 lattice forms a single, homogeneous perovskite solid solution. This single solid solution structure avoids the adverse effects of multiphase interfaces (such as interface defects and stress concentration), ensuring the structural consistency and performance controllability of the material.

[0067] The dielectric properties of the high-entropy perovskite oxide-doped ceramics prepared in Examples 1-4 were tested with respect to frequency variations, and the results were obtained. Figure 2 of (1- x )Ca 0.5 Sr 0.5 TiO3- x NBBSC (0.05≤ x ≤0.2) Ceramic dielectric constant and dielectric loss as a function of frequency. From Figure 2It can be seen that the dielectric constant and dielectric loss of the ceramic material have good stability at different test frequencies, especially the dielectric constant remains basically unchanged at different frequencies; and it can also be seen that the dielectric constant of the ceramic material gradually increases with the increase of the content of high-entropy perovskite oxide NBBSC.

[0068] The energy storage performance of the high-entropy perovskite oxide-doped ceramics prepared in Examples 1-4 was tested, and the results were obtained. Figure 3 of (1- x )Ca 0.5 Sr 0.5 TiO3- x NBBSC (0.05≤ x ≤0.2) system ceramics P - E Atlas. Through the analysis of Figure 3 Data calculations show that all ceramic system samples possess high energy storage density and achieve high energy storage efficiency (all greater than 96%), especially when x When =0.15, 0.85Ca 0.5 Sr 0.5 The TiO3-0.15NBBSC system ceramics achieved a very high energy storage density (4.37 J / cm³). 3 Meanwhile, all ceramic samples exhibited high breakdown field strength (330-560 kV / cm), especially when x When =0.15, 0.85Ca 0.5 Sr 0.5 The breakdown field strength of the TiO3-0.15NBBSC system ceramic is as high as 560 kV / cm. This shows that the introduction of the NBBSC system suppresses the electronic conductivity behavior of linear dielectrics under high electric fields, significantly improves the breakdown field strength of the ceramic system, and thus enables the ceramic system to achieve high energy density and high energy storage efficiency.

[0069] The high-entropy perovskite oxide-doped ceramics prepared by this invention exhibit good stability in dielectric constant and dielectric loss at different test frequencies, significantly improved breakdown field strength, and high energy storage density and efficiency. The preparation process is simple, and the formulation uses lead-free materials. The ceramic sintering is carried out in an air atmosphere, eliminating the need for a special atmosphere. Therefore, the technical solution is green and energy-saving, making it applicable to fields with higher dielectric performance requirements, such as high-energy-storage ceramic capacitors, high-performance multilayer ceramic capacitors (MLCCs), microwave communication devices, and tunable devices.

[0070] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A high-entropy perovskite oxide-doped ceramic, characterized in that, Its stoichiometric formula is (1- x )Ca 0.5 Sr 0.5 TiO3- x Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 TiO3, where 0.05≤ x ≤0.

2.

2. The method for preparing high-entropy perovskite oxide-doped ceramics according to claim 1, characterized in that, Includes the following steps: Step 1, mix the raw CaCO3, SrCO3 and TiO2 powders according to Ca 0.5 Sr 0.5 Weigh and mix the TiO3 chemical formula by molar mass percentage to form mixed powder A; then, combine the original powders of Na2CO3, Bi2O3, BaCO3, SrCO3, CaCO3, and TiO2 according to the following formula: Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 Weigh and mix the molar mass percentages of the chemical formula of TiO3 to form mixed powder B; Step 2: Mixed powder A and mixed powder B are ball-milled separately. The ball-milled slurry is then dried and pre-calcined to obtain Ca. 0.5 Sr 0.5 TiO3 powder and Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 TiO3 powder; Step 3, Ca 0.5 Sr 0.5 TiO3 powder and Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 TiO3 powder, according to (1- x )Ca 0.5 Sr 0.5 TiO3- x Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 TiO3, where 0.05≤ x Weigh and mix the chemical formulas with a molar mass percentage of ≤0.2, and then ball mill them; after ball milling, the slurry is dried and sieved to obtain mixed powder C; Step 4: Press the mixed powder C into a green body, and sinter the green body to obtain (1- x )Ca 0.5 Sr 0.5 TiO3- x Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 TiO3 ceramics.

3. The method for preparing high-entropy perovskite oxide-doped ceramics according to claim 2, characterized in that, The ball milling process of mixed powder A in step 2 is as follows: the mass ratio of mixed powder A: zirconia balls: deionized water is 1:5:(1-1.2), the mass of the zirconia balls is proportioned according to the diameter ratio of 10mm:6mm:3mm=5:3:1, the ball milling speed is 400rpm, and the ball milling time is 6-10h.

4. The method for preparing high-entropy perovskite oxide-doped ceramics according to claim 2, characterized in that, In step 2, the drying temperature of the slurry after ball milling of mixed powder A is 80-100℃ and the drying time is 18-24h; the pre-calcination temperature is 1150-1200℃ and the pre-calcination time is 2-3h.

5. The method for preparing high-entropy perovskite oxide-doped ceramics according to claim 2, characterized in that, The ball milling process of mixed powder B in step 2 is as follows: the mass ratio of mixed powder B: zirconia balls: deionized water is 1:5:(0.8-1.2), the mass of the zirconia balls is proportioned according to a diameter ratio of 6mm:3mm=5:2, the ball milling speed is 400rpm, and the ball milling time is 8-10h.

6. The method for preparing high-entropy perovskite oxide-doped ceramics according to claim 2, characterized in that, In step 2, the slurry after ball milling of mixed powder B is dried at a temperature of 80-100℃ for 20-24 hours; the pre-calcination temperature is 900℃ for 2-3 hours.

7. The method for preparing high-entropy perovskite oxide-doped ceramics according to claim 2, characterized in that, In step 3, Ca 0.5 Sr 0.5 TiO3 powder and Na 0.2 Bi 0.2 Ba 0.2 Sr 0.2 Ca 0.2 The process of ball milling TiO3 powder after mixing is as follows: the mass ratio of two mixed powders, zirconia balls and deionized water, is 1:5:(0.8-1.2). The mass of zirconia balls is proportioned according to a diameter ratio of 6mm:3mm=5:

2. The ball milling speed is 400rpm and the ball milling time is 10-12h.

8. The method for preparing high-entropy perovskite oxide-doped ceramics according to claim 2, characterized in that, In step 3, the slurry after ball milling is dried at a temperature of 80-100℃ for 20-24 hours; a 120-mesh sieve is used for sieving.

9. The method for preparing high-entropy perovskite oxide-doped ceramics according to claim 2, characterized in that, In step 4, cold isostatic pressing is used, with a pressure of 100 MPa, a sintering temperature of 1380-1400℃, and a sintering time of 2-4 hours.

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