High voltage ceramic capacitor and its application

Abstract

The application provides a high-voltage ceramic capacitor and application thereof, and belongs to the technical field of capacitor materials. m Zr n Sn p Ce q Si s )O3, wherein 0.5 >= m >= 0.25, 0.25 >= n >= 0.2, 0.25 >= p >= 0.2, 0.25 >= q >= 0, 0.1 >= s >= 0, and m+n+p+q+s=1. The layer thickness of the dielectric material is controlled to be 5-15 mm, so that the breakdown strength is improved without increasing the layer thickness.

Description

Technical Field

[0001] This invention belongs to the field of capacitor material technology, specifically relating to a high-voltage ceramic capacitor and its applications. Background Technology

[0002] With the miniaturization of mobile communication devices and the increasing speed of CPUs, the demand for capacitors is gradually growing. The core of a capacitor is the dielectric material. Among them, ceramic dielectrics have the characteristics of high dielectric constant, low dielectric loss, high tunability of dielectric properties, and low temperature sensitivity. They are increasingly being used in high-voltage, high-capacitance, and wide-range ambient temperature scenarios.

[0003] However, due to the limitations of intrinsic breakdown in ceramics, its breakdown electric field is typically around 100 kV cm⁻¹. -1 Therefore, increasing the breakdown voltage must rely on increasing the layer thickness. However, the requirements of miniaturization, portability, and lightweighting in modern communication equipment make increasing the layer thickness an effective but unwise approach. Furthermore, the improvement effect of increasing the layer thickness is also limited. Summary of the Invention

[0004] To address the problems existing in the background art, the present invention provides a high-voltage ceramic capacitor and its application. The high-voltage ceramic capacitor includes a dielectric material with a layer thickness controlled at 5-15 mm, thereby improving the breakdown strength without increasing the layer thickness.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a high-voltage ceramic capacitor comprising a dielectric material having a chemical composition of Ba(Ti) m Zr n Sn p Ce q Si s )O3, where 0.5≥m≥0.25, 0.25≥n≥0.2, 0.25≥p≥0.2, 0.25≥q>0, 0.1≥s>0, and m+n+p+q+s=1.

[0006] Furthermore, the preparation method of the dielectric material is as follows:

[0007] S1, Prepare Ba(Ti) according to the stoichiometric ratio m Zr n Sn p Ce q Si s The barium carbonate, titanium dioxide, zirconium oxide, tin oxide, cerium oxide, and silicon dioxide required for O3 are mixed to obtain a premix.

[0008] S2. After the premix obtained in S1 is subjected to a first ball milling treatment, it is calcined at 700-850℃ for 3 hours, and then subjected to a second ball milling treatment to obtain a mixed powder.

[0009] S3. Using a modified binder, press the mixed powder obtained in S2 into a disc with a thickness of 5-15mm to obtain a blank;

[0010] S4. After sintering the blank obtained in S3 at 1100-1350℃ for 2 hours, apply silver to the upper and lower surfaces, and then sinter at 800℃ for 15 minutes under nitrogen protection to obtain the final product.

[0011] Furthermore, in S2, the conditions for the first ball milling process are as follows: the mass ratio of the ball milling media to the material is 5-6:1, the ball milling speed is 300-350 r / min, and the ball milling time is 3-4 h.

[0012] Furthermore, in S2, the conditions for the second ball milling process are: the mass ratio of the ball milling media to the material is 7-8:1, the ball milling speed is 400-450 r / min, and the ball milling time is 4-5 h.

[0013] Furthermore, the milling media includes zirconia beads or stainless steel balls.

[0014] Furthermore, the mass of the modified adhesive is 3-5% of the mass of the mixed powder.

[0015] Furthermore, the modified adhesive is prepared as follows:

[0016] A1. Add 30g of polyvinyl alcohol to a 250mL three-necked flask equipped with a stirrer, then add 100-120mL of distilled water, and stir at 40-45℃ for 15min to completely dissolve the polyvinyl alcohol to obtain a polyvinyl alcohol solution.

[0017] A2. Add 3g of NaOH to a 100mL beaker, dissolve it with 50-60mL of distilled water, add 10-12g of acrylic acid to the beaker under ice bath conditions, stir well to obtain an acrylic acid solution.

[0018] A3. Add the polyvinyl alcohol solution obtained in A1 and the acrylic acid solution obtained in A2 to a three-necked flask equipped with a stirrer. Purge nitrogen gas at 35-40°C and stir evenly for 15 minutes to obtain a mixture. Add crosslinking agent, initiator and initiation auxiliary to the mixture, heat to 50-55°C, react for 2-3 hours, the system thickens, age for 30-40 minutes, remove the product, wash until neutral, dry, and pulverize to obtain modified binder powder.

[0019] A4. Dissolve or disperse the modified binder powder obtained in A3 in water to form a 7% (by mass) solution, which yields the modified binder.

[0020] Furthermore, in A3, the crosslinking agent is N,N'-methylenebisacrylamide, the initiator is potassium persulfate, and the initiation auxiliary is tetramethylethylenediamine.

[0021] Further, the amount of the crosslinking agent is 0.6-0.7% of the mass of the mixture, the amount of the initiator is 0.5-0.6% of the mass of the mixture, and the amount of the initiation auxiliary agent is 0.1-0.2% of the mass of the mixture.

[0022] In a second aspect, the present invention provides an application of the above-mentioned high-voltage ceramic capacitor in power detection equipment and national power grid equipment; in X-ray machines, CT scanners, DC high-voltage generator medical equipment; and in electronic equipment in the field of communication.

[0023] This application has the following beneficial effects:

[0024] 1. This invention improves the breakdown strength of the dielectric material by introducing Si; improves the breakdown strength of the dielectric material by using a modified binder; and there is a synergistic effect between the two, which can synergistically improve the breakdown strength of the dielectric material.

[0025] 2. In the preparation of the modified adhesive of this invention, polyvinyl alcohol and polyacrylic acid (derived from the polymerization of acrylic acid) achieve cohesion through high hydrogen bond density and physical entanglement of polymer chains. This three-dimensional network structure not only enhances the mechanical properties of the material but also effectively blocks current paths and increases breakdown voltage. The abundant non-composite hydroxyl and carboxylic acid groups can also establish various interactions with the surface of the adherends, including hydrogen bonds, coordination bonds, and van der Waals forces. These strong interfacial interactions also help improve the electrical strength of the material. The incorporation of nano-silica effectively improves tensile bond strength, enabling the modified adhesive to more effectively disperse stress throughout the material, reducing the risk of breakdown caused by stress concentration, thereby achieving the effect of improving breakdown strength. Attached Figure Description

[0026] Figure 1 A comparative trend chart of the breakdown strength test data of the materials prepared in Examples 1-5 and Comparative Examples 1-4 of the present invention. Detailed Implementation

[0027] The present application will be further described in detail below with reference to the embodiments.

[0028] Unless otherwise specified, the raw materials used in the embodiments and comparative examples of this application are all commercially available.

[0029] Example 1: (1) A modified adhesive was prepared, and the preparation method is as follows:

[0030] A1. Add 30g of polyvinyl alcohol to a 250mL three-necked flask equipped with a stirrer, then add 110mL of distilled water. Stir at 130r / min for 15min at 42℃ to completely dissolve the polyvinyl alcohol and obtain a polyvinyl alcohol solution.

[0031] A2. Add 3g of NaOH to a 100mL beaker, dissolve it with 55mL of distilled water, add 11g of acrylic acid to the beaker under ice bath conditions, and stir at 120r / min for 10min until homogeneous to obtain an acrylic acid solution.

[0032] A3. Add the polyvinyl alcohol solution obtained in A1 and the acrylic acid solution obtained in A2 to a three-necked flask equipped with a stirrer, introduce nitrogen gas at 38°C and stir at a constant speed of 100 r / min for 15 min to obtain a mixture.

[0033] Add N,N'-methylenebisacrylamide as a crosslinking agent, potassium persulfate as an initiator, and tetramethylethylenediamine as an initiation aid to the mixture. The amount of crosslinking agent is 0.65% of the mass of the mixture, the amount of initiator is 0.55% of the mass of the mixture, and the amount of initiation aid is 0.15% of the mass of the mixture.

[0034] Then, the temperature was raised to 52℃, and the reaction was continued with uniform stirring at 100 r / min for 2.5 h. The system thickened, stirring was stopped, and the product was aged for 35 min. The product was then filtered out. The product was washed with ethanol, air-dried, and then soaked in distilled water for seven days, changing the water every once in a while to wash away the residual monomers and other soluble substances in the reaction product, so that the pH value of the product was 7. The product was then dried in an oven, pulverized, and the modified binder powder was obtained.

[0035] A4. Dissolve or disperse the modified binder powder obtained in A3 in water to form a 7% (by mass) solution, thus obtaining the modified binder. The specific dissolution or dispersion method is as follows: add the modified binder powder to water, first stir at a uniform speed of 120 r / min for 5 min, then increase the speed to 180 r / min and stir at a uniform speed for 10 min, then decrease the speed to 100 r / min and stir at a uniform speed for 5 min.

[0036] Polyvinyl alcohol (PVA124) (Kuraray, Japan) was purchased from Guangzhou Qihua Chemical Co., Ltd. Acrylic acid was purchased from China National Pharmaceutical Group Shanghai Chemical Industry Co., Ltd. N,N'-Methylenebisacrylamide (industrial grade) was purchased from Zhengzhou Taixin Chemical Products Co., Ltd. Potassium persulfate was purchased from Shandong Jiaying Chemical Technology Co., Ltd. Tetramethylethylenediamine was purchased from Jinan Huifengda Chemical Co., Ltd.

[0037] (2) A dielectric material is prepared by the following method:

[0038] S1, Prepare Ba(Ti) according to the stoichiometric ratio 0.4Zr 0.2 Sn 0.2 Ce 0.1 Si 0.1 The barium carbonate, titanium dioxide, zirconium oxide, tin oxide, cerium oxide, and nano-silica required for O3 are mixed to obtain a premix.

[0039] S2. After the premix obtained in S1 is subjected to a first ball milling treatment, it is calcined at 800℃ for 3 hours, and then subjected to a second ball milling treatment to obtain a mixed powder.

[0040] The first ball milling treatment conditions were: a ball milling media to material mass ratio of 5.5:1, a ball milling speed of 320 r / min, and a ball milling time of 3.5 h. The second ball milling treatment conditions were: a ball milling media to material mass ratio of 7.5:1, a ball milling speed of 420 r / min, and a ball milling time of 4.5 h. The ball milling media consisted of zirconia beads with a diameter of 1.5 mm.

[0041] S3. Using the modified binder prepared in (1), the mixed powder obtained in S2 is pressed into a disc with a thickness of 10 mm to obtain a blank. The mass of the modified binder is 4% of the mass of the mixed powder.

[0042] S4. After sintering the blank obtained in S3 at 1200℃ for 2 hours, silver is coated on the upper and lower surfaces, and then sintered at 800℃ for 15 minutes under nitrogen protection to obtain the dielectric material.

[0043] A high-voltage ceramic capacitor comprising the dielectric material prepared as described above.

[0044] Example 2: The difference between this example and Example 1 is that: (1) A modified adhesive is prepared, and the preparation method is as follows:

[0045] A1. Add 30g of polyvinyl alcohol to a 250mL three-necked flask equipped with a stirrer, then add 100mL of distilled water. Stir at 130r / min for 15min at 40℃ to completely dissolve the polyvinyl alcohol and obtain a polyvinyl alcohol solution.

[0046] A2. Add 3g of NaOH to a 100mL beaker, dissolve it with 50mL of distilled water, add 10g of acrylic acid to the beaker under ice bath conditions, and stir at 120r / min for 10min until homogeneous to obtain an acrylic acid solution.

[0047] A3. Add the polyvinyl alcohol solution obtained in A1 and the acrylic acid solution obtained in A2 to a three-necked flask equipped with a stirrer. Purge with nitrogen gas at 35°C and stir at a constant speed of 100 r / min for 15 min to obtain a mixture.

[0048] Add N,N'-methylenebisacrylamide as a crosslinking agent, potassium persulfate as an initiator, and tetramethylethylenediamine as an initiation aid to the mixture. The amount of crosslinking agent is 0.6% of the mass of the mixture, the amount of initiator is 0.5% of the mass of the mixture, and the amount of initiation aid is 0.1% of the mass of the mixture.

[0049] Then, the temperature was raised to 50℃, and the reaction was continued with uniform stirring at 100r / min for 2 hours. The system thickened, stirring was stopped, and the product was aged for 30 minutes and filtered out. The product was washed with ethanol, air-dried, and then soaked in distilled water for seven days, changing the water every once in a while to wash away the residual monomers and other soluble substances in the reaction product, so that the pH value of the product was 7. The product was then dried in an oven, pulverized, and the modified binder powder was obtained.

[0050] A4. Dissolve or disperse the modified binder powder obtained in A3 in water to form a 7% (by mass) solution, which yields the modified binder.

[0051] Example 3: The difference between this example and Example 1 is that: (1) A modified adhesive is prepared, and the preparation method is as follows:

[0052] A1. Add 30g of polyvinyl alcohol to a 250mL three-necked flask equipped with a stirrer, then add 120mL of distilled water. Stir at 130r / min for 15min at 45℃ to completely dissolve the polyvinyl alcohol and obtain a polyvinyl alcohol solution.

[0053] A2. Add 3g of NaOH to a 100mL beaker, dissolve it with 60mL of distilled water, add 12g of acrylic acid to the beaker under ice bath conditions, and stir at 120r / min for 10min until homogeneous to obtain an acrylic acid solution.

[0054] A3. Add the polyvinyl alcohol solution obtained in A1 and the acrylic acid solution obtained in A2 to a three-necked flask equipped with a stirrer, introduce nitrogen gas at 40°C and stir at a constant speed of 100 r / min for 15 min to obtain a mixture.

[0055] Add N,N'-methylenebisacrylamide as a crosslinking agent, potassium persulfate as an initiator, and tetramethylethylenediamine as an initiation aid to the mixture. The amount of crosslinking agent is 0.7% of the mass of the mixture, the amount of initiator is 0.6% of the mass of the mixture, and the amount of initiation aid is 0.2% of the mass of the mixture.

[0056] Then, the temperature was raised to 55℃, and the reaction was continued with uniform stirring at 100r / min for 3 hours. The system thickened, stirring was stopped, and the product was aged for 40 minutes and filtered out. The product was washed with ethanol, air-dried, and then soaked in distilled water for seven days, changing the water every once in a while to wash away the residual monomers and other soluble substances in the reaction product, so that the pH value of the product was 7. The product was then dried in an oven, pulverized, and the modified binder powder was obtained.

[0057] A4. Dissolve or disperse the modified binder powder obtained in A3 in water to form a 7% (by mass) solution, which yields the modified binder.

[0058] Example 4: The difference between this example and Example 1 is that: (2) A dielectric material is prepared, and the preparation method is as follows:

[0059] S1, Prepare Ba(Ti) according to the stoichiometric ratio 0.25 Zr 0.25 Sn 0.25 Ce 0.2 Si 0.05 The barium carbonate, titanium dioxide, zirconium oxide, tin oxide, cerium oxide, and silicon dioxide required for O3 are mixed to obtain a premix.

[0060] S2. After the premix obtained in S1 is subjected to a first ball milling treatment, it is calcined at 800℃ for 3 hours, and then subjected to a second ball milling treatment to obtain a mixed powder.

[0061] The first ball milling treatment conditions were: a ball milling media to material mass ratio of 5:1, a ball milling speed of 350 r / min, and a ball milling time of 3 h. The second ball milling treatment conditions were: a ball milling media to material mass ratio of 7:1, a ball milling speed of 400 r / min, and a ball milling time of 4 h. The ball milling media were zirconia beads.

[0062] S3. Using a modified binder, press the mixed powder obtained in S2 into a disc with a thickness of 10 mm to obtain a blank. The mass of the modified binder is 4% of the mass of the mixed powder.

[0063] S4. After sintering the blank obtained in S3 at 1150℃ for 2 hours, silver is coated on the upper and lower surfaces, and then sintered at 800℃ for 15 minutes under nitrogen protection to obtain the dielectric material.

[0064] Example 5: The difference between this example and Example 1 is that: (2) A dielectric material is prepared, and the preparation method is as follows:

[0065] S1, Prepare Ba(Ti) according to the stoichiometric ratio 0.5 Zr 0.2 Sn 0.2 Ce 0.05 Si 0.05The barium carbonate, titanium dioxide, zirconium oxide, tin oxide, cerium oxide, and silicon dioxide required for O3 are mixed to obtain a premix.

[0066] S2. After the premix obtained in S1 is subjected to a first ball milling treatment, it is calcined at 850℃ for 3 hours, and then subjected to a second ball milling treatment to obtain a mixed powder.

[0067] The first ball milling treatment conditions were: a ball milling media to material mass ratio of 6:1, a ball milling speed of 350 r / min, and a ball milling time of 4 h. The second ball milling treatment conditions were: a ball milling media to material mass ratio of 8:1, a ball milling speed of 450 r / min, and a ball milling time of 5 h. The ball milling media were zirconia beads.

[0068] S3. Using a modified binder, press the mixed powder obtained in S2 into a disc with a thickness of 10 mm to obtain a blank. The mass of the modified binder is 4% of the mass of the mixed powder.

[0069] S4. After sintering the blank obtained in S3 at 1300℃ for 2 hours, silver is coated on the upper and lower surfaces, and then sintered at 800℃ for 15 minutes under nitrogen protection to obtain the dielectric material.

[0070] Comparative Example 1: The difference between this comparative example and Example 1 is that Si is removed in the preparation of the dielectric material, that is, nano-silicon dioxide is removed.

[0071] Specifically, in the preparation of a dielectric material, S1 and Ba(Ti) are prepared in stoichiometric ratios. 0.4 Zr 0.2 Sn 0.2 Ce 0.1 The barium carbonate, titanium oxide, zirconium oxide, tin oxide and cerium oxide required for O3 are mixed to obtain a premix.

[0072] Comparative Example 2: The difference between this comparative example and Example 1 is that the modified adhesive is replaced with a common commercially available PVA adhesive.

[0073] This commercially available PVA adhesive (solid content 18±1%) was purchased from Qianzhou Coating Materials Factory in Wuxi. When using it, it is first prepared with water to a solid content of 7% before application.

[0074] Comparative Example 3: The difference between this comparative example and Example 1 is that Si is removed in the preparation of the dielectric material; and the modified adhesive is replaced with a common commercially available PVA adhesive.

[0075] Specifically, in the preparation of a dielectric material, S1 and Ba(Ti) are prepared in stoichiometric ratios. 0.4 Zr 0.2 Sn 0.2 Ce 0.1The barium carbonate, titanium oxide, zirconium oxide, tin oxide and cerium oxide required for O3 are mixed to obtain a premix.

[0076] Furthermore, the commercially available PVA adhesive (solid content 18±1%) was purchased from Qianzhou Coating Materials Factory in Wuxi. In specific use, it was first prepared with water to a solid content of 7% before application.

[0077] Comparative Example 4: The difference between this comparative example and Example 1 is that in the preparation of the dielectric material, an equal amount of nano-silica is used in the preparation of the modified adhesive.

[0078] Specifically, in the preparation of a dielectric material, S1 and Ba(Ti) are prepared in stoichiometric ratios. 0.4 Zr 0.2 Sn 0.2 Ce 0.1 Si 0.1 The barium carbonate, titanium dioxide, zirconium oxide, tin oxide, cerium oxide, and nano-silica required for O3 are mixed thoroughly, except for the nano-silica, to obtain a premix. The nano-silica is then set aside.

[0079] Furthermore, the spare nano-silica is used in the preparation of the modified adhesive, specifically added together with the polyvinyl alcohol solution obtained in A1 and the acrylic acid solution obtained in A2.

[0080] Test examples: The breakdown strength of the dielectric materials prepared in Examples 1-5 and Comparative Examples 1-4 is shown in Table 1 and... Figure 1 .

[0081] Table 1. Test data for the experimental cases

[0082] Breakdown strength (kV / cm) Example 1 188 Example 2 190 Example 3 192 Example 4 186 Example 5 185 Comparative Example 1 171 Comparative Example 2 160 Comparative Example 3 151 Comparative Example 4 179

[0083] Experimental conclusions: Analysis of Examples 1-5 and data in Table 1 and... Figure 1 It can be seen that the dielectric material prepared by this invention has a breakdown strength of up to 185kV / cm or higher.

[0084] Analysis of Example 1 and Comparative Examples 1-3, combined with data from Table 1 and Figure 1 It can be seen that the introduction of Si can improve the breakdown strength of the dielectric material; replacing the commercially available PVA adhesive with the self-made modified adhesive of this invention can also improve the breakdown strength of the dielectric material; and there is a synergistic effect between the two, which can synergistically improve the breakdown strength of the dielectric material.

[0085] Analysis of Example 1 and Comparative Example 4, combined with data from Table 1 and Figure 1As can be seen, compared with Example 1, Comparative Example 4 changed the way Si was introduced, and introduced Si directly during the preparation of the modified adhesive. As a result, the breakdown strength of the dielectric material decreased instead of increasing.

[0086] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0087] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A high voltage ceramic capacitor characterized by, comprising a dielectric material having a chemical composition of Ba(Ti m Zr n Sn p Ce q Si s )03, where 0.5 > m > 0.25, 0.25 > n > 0.2, 0.25 > p > 0.2, 0.25 > q > 0, 0.1 > s > 0, and m + n + p + q + s = 1. The preparation method of the dielectric material is as follows: S1, Ba(Ti m Zr n Sn p Ce q Si s )O3, mix well to get premix S2, the premix obtained in S1 is subjected to first ball milling treatment, calcined at 700-850 DEG C for 3h, and then subjected to second ball milling treatment, to obtain mixed powder; S3, the mixed powder obtained in S2 is pressed into a disc using modified adhesive, with a thickness of 5-15mm, to obtain a green body; S4, the green body obtained in S3 is sintered at 1100-1350 DEG C for 2h, the upper and lower surfaces are brushed with silver, and then sintered at 800 DEG C for 15min under nitrogen protection, to obtain the product; The preparation method of the modified adhesive is as follows: A1, 30g of polyvinyl alcohol is added into a 250mL three-necked bottle, 100-120mL of distilled water is added, and stirring is carried out at 40-45 DEG C for 15min, to obtain a polyvinyl alcohol solution; A2, 3g of NaOH is added into a 100mL beaker, 50-60mL of distilled water is added, and stirring is carried out under ice bath, and then 10-12g of acrylic acid is added, to obtain an acrylic acid solution; A3, the polyvinyl alcohol solution obtained in A1 and the acrylic acid solution obtained in A2 are added into a three-necked bottle, nitrogen is introduced and stirring is carried out at 35-40 DEG C for 15min, to obtain a mixed solution; crosslinking agent, initiator and initiation auxiliary agent are added into the mixed solution, the temperature is raised to 50-55 DEG C, and reaction is carried out for 2-3h, the product is washed to neutral after aging for 30-40min, and drying and crushing are carried out, to obtain modified adhesive powder; A4, the modified adhesive powder obtained in A3 is dissolved or dispersed in water to form a 7% mass fraction solution, to obtain the modified adhesive.

2. The high voltage ceramic capacitor according to claim 1, characterized in that, In S2, the first ball milling treatment conditions are as follows: the mass ratio of ball milling medium to material is 5-6:1, the ball milling rotation speed is 300-350r / min, and the ball milling time is 3-4h.

3. The high voltage ceramic capacitor of claim 2, wherein, In S2, the second ball milling treatment conditions are as follows: the mass ratio of ball milling medium to material is 7-8:1, the ball milling rotation speed is 400-450r / min, and the ball milling time is 4-5h.

4. The high voltage ceramic capacitor according to claim 2 or 3, characterized in that, The ball milling medium includes zirconia beads or stainless steel balls.

5. The high voltage ceramic capacitor of claim 1, wherein, The mass of the modified adhesive is 3-5% of the mass of the mixed powder.

6. The high voltage ceramic capacitor of claim 1, wherein, In A3, the crosslinking agent is N,N'-methylene bisacrylamide, the initiator is potassium persulfate, and the initiation auxiliary agent is tetramethyl ethylenediamine.

7. The high voltage ceramic capacitor according to claim 6, characterized in that The amount of the crosslinking agent is 0.6-0.7% of the mass of the mixed solution, the amount of the initiator is 0.5-0.6% of the mass of the mixed solution, and the amount of the initiation auxiliary agent is 0.1-0.2% of the mass of the mixed solution.

8. Use of a high-voltage ceramic capacitor according to any one of claims 1 to 7, characterized in that For power detection equipment or X-ray machine or CT machine or electronic equipment in communication field.

9. Use of a high-voltage ceramic capacitor according to any one of claims 1 to 7, characterized in that For national power grid equipment or direct current high voltage generator medical equipment.

Images