CN116143514B - Microwave dielectric ceramic and preparation method thereof - Google Patents
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- 239000000919 ceramic Substances 0.000 title claims abstract description 137
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- 239000000203 mixture Substances 0.000 claims abstract description 77
- 239000000463 material Substances 0.000 claims abstract description 33
- 238000000227 grinding Methods 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 28
- 238000001354 calcination Methods 0.000 claims description 26
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 21
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 21
- 229910021193 La 2 O 3 Inorganic materials 0.000 claims description 18
- 101100513612 Microdochium nivale MnCO gene Proteins 0.000 claims description 17
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Abstract
The application relates to the technical field of ceramic materials, in particular to a microwave dielectric ceramic and a preparation method thereof. The microwave dielectric ceramic comprises a ceramic base material, wherein the ceramic base material comprises Sr 1‑x (La 0.5 Sm 0.5 ) x Al x Ti 1‑x And Sr 2 CeO 4 Is a mixture of Sr 1‑x (La 0.5 Sm 0.5 ) x Al x Ti 1‑x With Sr 2 CeO 4 The molar ratio of (1-y) is y, wherein x is more than or equal to 0.4 and less than or equal to 0.5, and y is more than or equal to 0.1 and less than or equal to 0.2. The application is realized by adding Sr 2 CeO 4 The microwave dielectric ceramic with high quality factor and adjustable dielectric constant is obtained, the application range is wide, and the microwave dielectric ceramic can be suitable for the application of various different microwave communication devices, so that the cost for developing different devices is reduced, the gain of the devices is improved, and the loss of the devices is reduced.
Description
Technical Field
The application relates to the technical field of ceramic materials, in particular to a microwave dielectric ceramic and a preparation method thereof.
Background
The microwave dielectric ceramic is an important functional ceramic material, is one of ceramic materials applied to the field of microwave communication, and is mainly applied to the fields of dielectric resonators, dielectric filters, waveguide diplexers, antennas and the like as a dielectric material to complete one or more functions. The microwave dielectric ceramic greatly improves the size and the packaging density of the microwave integrated circuit.
Three main performance indexes are used for measuring the microwave dielectric ceramics: dielectric constant, resonant frequency temperature coefficient, quality factor. The dielectric constant simply characterizes the frequency at which the resonator is suitable and determines the device size. The temperature coefficient of the resonant frequency, also called temperature drift, characterizes the ability of the device to work stably under the change of the ambient temperature. The quality factor measures the filter characteristics and the communication quality in a simple way. The higher the quality factor, the better the communication quality. In general, the dielectric constant is inversely related to the quality factor and positively related to the temperature coefficient of the resonant frequency. At present, different material systems need to be developed aiming at different microwave communication devices (resonators, filters and the like), and the cost of material development is increased. The microwave dielectric ceramic with adjustable dielectric constant is one of key schemes for solving different device designs.
Therefore, it is necessary to provide an improved microwave dielectric ceramic and a preparation scheme thereof, so that the obtained microwave dielectric ceramic has a high quality factor and an adjustable dielectric constant, has a wide application range, and can be suitable for various applications of different microwave communication devices, so as to reduce the cost for developing different devices, improve the gain of the devices and reduce the loss of the devices.
The invention comprises the following steps:
aiming at the problems in the prior art, the application provides the microwave dielectric ceramic and the preparation method thereof, so that the microwave dielectric ceramic with higher quality factor and adjustable dielectric constant is obtained, the application range is wide, and the microwave dielectric ceramic can be applied to various different microwave communication devices, so that the cost for developing different devices is reduced, the gain of the devices is improved, and the loss of the devices is reduced. The specific technical scheme is as follows:
in one aspect, the application provides a microwave dielectric ceramic comprising a ceramic base material consisting of Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x And Sr 2 CeO 4 Is a mixture of said Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x With the Sr 2 CeO 4 The molar ratio of (1-y) is y, wherein x is more than or equal to 0.4 and less than or equal to 0.5, and y is more than or equal to 0.1 and less than or equal to 0.2.
Further, the ceramic base material is obtained through mixing reaction of a plurality of ceramic raw materials, and the ceramic raw materials comprise the following raw materials:
SrCO 3 、TiO 2 、Sm 2 O 3 、La 2 O 3 、Al 2 O 3 and CeO 2 。
Further, the method comprises the steps of,
the SrCO 3 The TiO 2 The Sm is 2 O 3 The La is 2 O 3 Said Al 2 O 3 And the CeO 2 The molar ratio of (0.39-0.47), (0.26-0.27), (0.04-0.07) and (0.04-0).07 (0.08-0.14) and (0.06-0.11), wherein the endpoint value is preferable.
Further, the dielectric constant of the microwave dielectric ceramic is between 35 and 45.
Further, in the interval range of the value x and the value y, the larger the value x is, the smaller the value y is, and the dielectric constant of the microwave dielectric ceramic is small.
In another aspect, the present application further provides a method for preparing a microwave dielectric ceramic, where the method includes:
SrCO in a predetermined molar ratio 3 、TiO 2 、Sm 2 O 3 、La 2 O 3 、Al 2 O 3 And CeO 2 Placing the mixture in a preset device, adding a solvent, mixing, grinding and drying the mixture through a grinding medium to obtain a first mixture;
calcining the first mixture for a preset time to obtain a second mixture;
placing the second mixture, the binder and the additive into a preset device, adding a solvent, and grinding by a grinding medium to obtain a target material;
forming and processing the target material to obtain the microwave dielectric ceramic comprising ceramic base material, wherein the ceramic base material comprises Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x And Sr 2 CeO 4 Is a mixture of said Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x With the Sr 2 CeO 4 The molar ratio of (1-y) is y, wherein x is more than or equal to 0.4 and less than or equal to 0.5, and y is more than or equal to 0.1 and less than or equal to 0.2.
Further, the method comprises the steps of,
the SrCO 3 The TiO 2 The Sm is 2 O 3 The La is 2 O 3 Said Al 2 O 3 And the CeO 2 The molar ratio of (0.39-0.47), (0.26-0.27), (0.04-0.07), (0.08-0.14), (0.06-0.11) is sequentially shown, wherein the endpoint value is preferable.
Further, the additive is MnCO 3 And Y 2 O 3 。
Further, the preparation method satisfies at least one of the following characteristics:
the MnCO 3 The content of the catalyst is 0.05 to 0.1 weight percent of the mass of the second mixture;
the Y is 2 O 3 The content of (2) is 0.1-0.3 wt% of the second mixture.
Further, the preparation method satisfies at least one of the following characteristics:
the calcination temperature of the calcination treatment is 1250-1350 ℃;
the preset time is 3-5h.
Due to the technical scheme, the microwave dielectric ceramic and the preparation method thereof provided by the application have the following beneficial effects:
the application is realized by adding Sr 2 CeO 4 And changing the mole ratio of the mixture in the ceramic base material to obtain the microwave dielectric ceramic with higher quality factor and adjustable dielectric constant, which has wide application range and can be applied to various different microwave communication devices so as to reduce the cost for developing different devices, improve the gain of the devices and reduce the loss of the devices.
Drawings
In order to more clearly illustrate the technical solutions and advantages of embodiments of the present application or of the prior art, the following description will briefly introduce the drawings that are required to be used in the embodiments or the prior art descriptions, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a graph of data for the variation of dielectric constant and quality factor with x and y values for several microwave dielectric ceramics provided herein;
fig. 2 is a schematic flow chart of a method for preparing microwave dielectric ceramic according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.
For the following defined terms, these definitions shall be applied, unless a different definition is given in the claims or elsewhere in this specification. All numerical values, whether or not explicitly indicated, are defined herein as modified by the term "about". The term "about" generally refers to a range of values that one of ordinary skill in the art would consider equivalent to the stated value to produce substantially the same properties, functions, results, etc. A range of values indicated by a low value and a high value is defined to include all values included within the range of values and all subranges included within the range of values.
It is noted that the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the foregoing figures are intended to cover non-exclusive inclusions.
The microwave dielectric ceramic comprises a ceramic base material composed of Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x And Sr 2 CeO 4 Is a mixture of Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x With Sr 2 CeO 4 The molar ratio of (1-y) is y, wherein x is more than or equal to 0.4 and less than or equal to 0.5, and y is more than or equal to 0.1 and less than or equal to 0.2.
The application is realized by adding Sr 2 CeO 4 And the molar ratio of the mixture in the ceramic base material and the content of each element are changed, namely the values of x and y are regulated, so that the microwave dielectric ceramic with higher quality factor and adjustable dielectric constant is obtained, the application range is wide, and the microwave dielectric ceramic can be suitable for the application of various microwave communication devices so as to reduce the development of different devicesThe cost of the device is increased, the gain of the device is improved, and the loss of the device is reduced.
In some embodiments, the quality factor of the microwave dielectric ceramic of the present application is greater than 50000.
In some embodiments, the resonant frequency temperature coefficient of the microwave dielectric ceramic of the present application is greater than-10 ppm/°c and less than 10ppm/°c.
In some embodiments, the ceramic base is obtained by mixing a plurality of ceramic raw materials, including the following raw materials: srCO 3 、TiO 2 、Sm 2 O 3 、La 2 O 3 、Al 2 O 3 And CeO 2 。
The microwave dielectric ceramic with higher quality factor and adjustable dielectric constant is obtained through the mixing reaction of the ceramic raw materials, has wide application range, and can be applied to various different microwave communication devices so as to reduce the cost for developing different devices, improve the gain of the devices and reduce the loss of the devices.
In some embodiments, srCO 3 、TiO 2 、Sm 2 O 3 、La 2 O 3 、Al 2 O 3 And CeO 2 The molar ratio of (0.39-0.47), (0.26-0.27), (0.04-0.07), (0.08-0.14), (0.06-0.11) is sequentially shown, wherein the endpoint value is preferable. SrCO 3 、TiO 2 、Sm 2 O 3 、La 2 O 3 、Al 2 O 3 And CeO 2 The molar contents of the raw materials are calculated according to the x and y values in the chemical formula, and the normalized numerical value is obtained by adding the molar ratios of the raw materials in each group to be 1.
The microwave dielectric ceramic with higher quality factor and adjustable dielectric constant is obtained through the ceramic raw material mixing reaction of the molar ratio, has wide application range, and can be applied to various different microwave communication devices so as to reduce the cost for developing different devices, improve the gain of the devices and reduce the loss of the devices.
In some embodiments, the molar ratio of Sm element to La element is 1:1.
In other embodiments, srCO 3 、TiO 2 、Sm 2 O 3 、La 2 O 3 、Al 2 O 3 And CeO 2 The molar ratio of (0.4-0.47), (0.2-0.27), (0.01-0.07), (0.04-0.05), (0.08-0.1) and (0.01-0.11) in turn, wherein the endpoint value is preferable.
In some embodiments, the dielectric constant of the microwave dielectric ceramic is between 35-45. It should be noted that, when an electric field is applied to a medium, induced charges are generated to weaken the electric field, and the ratio of the original applied electric field (in vacuum) to the electric field in the final medium is the dielectric constant, which is also called the dielectric constant.
In the embodiment of the present application, under the condition that the values of x and y are different, the quality factors and dielectric constants of the microwave dielectric ceramics are also different, please refer to fig. 1, fig. 1 is a data diagram of the dielectric constants and quality factors of several microwave dielectric ceramics provided by the present application according to the changes of the values of x and y, wherein K represents the dielectric constant, and Qf represents the quality factor; specifically, the dielectric constant and the quality factor of the microwave dielectric ceramic in the cases of x=0.4 and y=0.2, x=0.43 and y=0.18, x=0.45 and y=0.15, x=0.47 and y=0.13, x=0.5 and y=0.1 are obtained respectively, that is, the larger the value of x and the smaller the value of y, the dielectric constant of the microwave dielectric ceramic is smaller in the interval range of the value of x and the value of y; the value of x is reduced, the value of y is increased, and the dielectric constant is increased. Exemplary, when x is 0.4-0.45 and y is 0.15-0.2, the dielectric constant of the microwave dielectric ceramic provided by the application is between 40 and 45, and the quality factor is more than 50000; when x is 0.45-0.5 and y is 0.1-0.15, the dielectric constant of the microwave dielectric ceramic provided by the application is 35-40, and the quality factor is more than 60000. The microwave dielectric ceramic with higher quality factor and adjustable dielectric constant is obtained by adjusting the values of x and y, has wide application range, and can be applied to various different microwave communication devices so as to reduce the cost for developing different devices, improve the gain of the devices and reduce the loss of the devices.
The application also provides a preparation method of the microwave dielectric ceramic, please refer to fig. 2, the method includes:
s101, srCO with preset molar ratio 3 、TiO 2 、Sm 2 O 3 、La 2 O 3 、Al 2 O 3 And CeO 2 And (3) placing the mixture in a preset device, adding a solvent, mixing, grinding and drying the mixture through a grinding medium to obtain a first mixture.
In some embodiments, sm 2 O 3 And La (La) 2 O 3 The molar ratio of (2) is 1:1.
In some embodiments, the preset device may be a ball mill and the solvent may be deionized water; the grinding media may be zirconia balls.
In some embodiments, srCO 3 、TiO 2 、Sm 2 O 3 、La 2 O 3 、Al 2 O 3 And CeO 2 The molar ratio of (0.39-0.47), (0.26-0.27), (0.04-0.07), (0.08-0.14), (0.06-0.11) is sequentially shown, wherein the endpoint value is preferable. SrCO 3 、TiO 2 、Sm 2 O 3 、La 2 O 3 、Al 2 O 3 And CeO 2 The sum of the molar ratios of (2) is 1. The application discloses SrCO with different molar ratios 3 、TiO 2 、Sm 2 O 3 、La 2 O 3 、Al 2 O 3 And CeO 2 The microwave dielectric ceramics with different performance parameters are prepared from the preparation raw materials, so that the microwave dielectric ceramics with higher quality factors and adjustable dielectric constants are obtained, the application range is wide, and the microwave dielectric ceramics can be applied to various different microwave communication devices, so that the cost for developing different devices is reduced, the gain of the devices is improved, and the loss of the devices is reduced.
And S102, calcining the first mixture for a preset time to obtain a second mixture.
In some embodiments, the calcination temperature of the calcination treatment is 1250-1350 ℃.
In other embodiments, the calcination temperature of the calcination treatment is 1200-1350 ℃.
In other embodiments, the calcination temperature of the calcination process is 1250-1300 ℃.
In other embodiments, the calcination temperature of the calcination treatment is 1280-1320 ℃.
In some embodiments, the preset time is 3-5 hours.
In other embodiments, the preset time is 4-5 hours.
In other embodiments, the preset time is 3-4 hours.
In other embodiments, the preset time is 2-6 hours.
S103, placing the second mixture, the binder and the additive into a preset device, adding a solvent, and grinding by a grinding medium to obtain a target material.
In some embodiments, the binder may be an aqueous solution of polyvinyl alcohol.
In some embodiments, the additive is MnCO 3 And Y 2 O 3 。
The method adds a certain amount of MnCO in the process of preparing the microwave dielectric ceramic 3 And Y 2 O 3 Controlling defects occurring in ceramic sintering and promoting Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x And Sr 2 CeO 4 The ions in the mixture structure are orderly arranged, and the quality factor is improved.
In some embodiments, mnCO 3 The content of the (B) is 0.05-0.1 wt% of the mass of the second mixture.
In other embodiments, mnCO 3 The content of (2) is 0.07-0.1 wt% of the mass of the second mixture.
In other embodiments, mnCO 3 The content of the (B) is 0.05-0.08 wt% of the mass of the second mixture.
In other embodiments, mnCO 3 The content of the (B) is 0.06-0.09 wt% of the mass of the second mixture.
In some embodiments, Y 2 O 3 The content of (C) is 0.1-0.3 wt% of the second mixture.
In other embodiments, Y 2 O 3 The content of (C) is 0.2-0.3 wt% of the second mixture.
In other embodiments, Y 2 O 3 The content of (C) is 0.1-0.2 wt% of the second mixture.
In other embodiments, Y 2 O 3 The content of (C) is 0.15-0.25 wt% of the second mixture.
The method adds MnCO with specific content range in the process of preparing the microwave dielectric ceramic 3 And Y 2 O 3 The defects in ceramic sintering are more effectively controlled and Sr is promoted 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x And Sr 2 CeO 4 The ions in the mixture structure are orderly arranged, and the quality factor is improved.
S104, forming and processing the ceramic base material based on the target material to obtain the microwave dielectric ceramic comprising the ceramic base material, wherein the ceramic base material comprises Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x And Sr 2 CeO 4 Is a mixture of Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x With Sr 2 CeO 4 The molar ratio of (1-y) is y, wherein x is more than or equal to 0.4 and less than or equal to 0.5, and y is more than or equal to 0.1 and less than or equal to 0.2.
In some embodiments, the resulting microwave dielectric ceramic includes a ceramic base having a composition of Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x And Sr 2 CeO 4 Is a mixture of Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x With Sr 2 CeO 4 When x is 0.4-0.45 and y is 0.15-0.2, the dielectric constant of the microwave dielectric ceramic is 40-45, and the quality factor is more than 50000;
in other embodiments, a microwave dielectric ceramic is obtained comprising a ceramic base material having a composition of Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x And Sr 2 CeO 4 Is a mixture of Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x With Sr 2 CeO 4 The molar ratio of (1-y) is y, when x is 0.45-0.5 and y is 0.1-0.15, the dielectric constant of the microwave dielectric ceramic is 35-40, and the quality factor is more than 60000.
The preparation method further obtains the microwave dielectric ceramic with higher quality factor and adjustable dielectric constant, has wide application range, and can be suitable for application of various different microwave communication devices so as to reduce the cost for developing different devices, improve the gain of the devices and reduce the loss of the devices.
In some embodiments, the quality factor of the microwave dielectric ceramic obtained by the preparation method of the application is more than 50000.
In some embodiments, the resonant frequency temperature coefficient of the microwave dielectric ceramic obtained by the preparation method of the application is greater than-10 ppm/DEG C and less than 10 ppm/DEG C.
In some embodiments, S104 comprises:
s201: granulating the target material to obtain granules;
s202: carrying out compression molding treatment on the granulating material to obtain a ceramic biscuit;
s203: and (3) performing glue discharging sintering treatment on the ceramic biscuit to obtain the microwave dielectric ceramic comprising the ceramic base material.
In some embodiments, the temperature of the paste ejection sintering process comprises 1500-1580 ℃.
In other embodiments, the temperature of the paste ejection sintering process includes 1550-1580 ℃.
In other embodiments, the temperature of the paste ejection sintering process includes 1500-1560 ℃.
In other embodiments, the temperature of the paste ejection sintering process includes 1520-1550 ℃.
In some embodiments, the hold time for the paste ejection sintering comprises 4-6 hours.
In other embodiments, the hold time for the paste ejection sintering comprises 5-6 hours.
In other embodiments, the hold time for the paste ejection sintering comprises 4-5 hours.
In other embodiments, the hold time for the paste ejection sintering comprises 3-7 hours.
In some embodiments, the resulting microwave dielectric ceramic includes a ceramic base having a composition of Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x And Sr 2 CeO 4 Wherein Y as the value of x increases 2 O 3 Also the content of (2) is increased and MnCO 3 Is reduced; as the x value increases, the calcination temperature of the calcination process and the temperature of the paste ejection sintering process both increase.
The following describes some specific embodiments of the present specification based on the above technical solutions.
Example 1
The following describes a preparation method of a microwave dielectric ceramic provided in embodiment 1 of the present application, where the method includes:
s101, srCO with preset molar ratio 3 、TiO 2 、Sm 2 O 3 、La 2 O 3 、Al 2 O 3 And CeO 2 And (3) placing the mixture in a preset device, adding a solvent, mixing, grinding and drying the mixture through a grinding medium to obtain a first mixture.
Specifically, the preset device may be a ball mill, and the solvent may be deionized water; the grinding media may be zirconia balls.
Specifically SrCO 3 、TiO 2 、Sm 2 O 3 、La 2 O 3 、Al 2 O 3 And CeO 2 The molar ratio of (2) is 0.47:0.26:0.04:0.04:0.08:0.11 in sequence.
And S102, calcining the first mixture for a preset time to obtain a second mixture.
Specifically, the calcination temperature of the calcination treatment was 1250 ℃.
Specifically, the preset time is 4 hours.
S103, placing the second mixture, the binder and the additive into a preset device, adding a solvent, and grinding by a grinding medium to obtain a target material.
Specifically, the binder may be an aqueous polyvinyl alcohol solution.
Specifically, the additive is MnCO 3 And Y 2 O 3 Wherein MnCO 3 The content of (C) is 0.1wt% of the mass of the second mixture, Y 2 O 3 The content of (2) was 0.1wt% of the second mixture.
The method adds MnCO with specific content in the process of preparing the microwave dielectric ceramic 3 And Y 2 O 3 The defects in ceramic sintering are more effectively controlled and Sr is promoted 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x And Sr 2 CeO 4 The ions in the mixture structure are orderly arranged, and the quality factor is improved.
S104, granulating the target material to obtain granules;
s105: carrying out compression molding treatment on the granulating material to obtain a ceramic biscuit;
s106: and (3) performing glue discharging sintering treatment on the ceramic biscuit to obtain the microwave dielectric ceramic comprising the ceramic base material. The ceramic base material comprises Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x And Sr 2 CeO 4 Is a mixture of Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x With Sr 2 CeO 4 The molar ratio of (1-y) is y, wherein x=0.4 and y=0.2.
Specifically, the temperature of the paste discharging sintering treatment includes 1500 ℃.
Specifically, the heat preservation time of the adhesive discharging sintering comprises 5 hours.
The dielectric constant of the microwave dielectric ceramic obtained by the preparation method of the embodiment 1 of the application is 44.3; the quality factor of the microwave dielectric ceramic is greater than 50300; the resonant frequency temperature coefficient of the microwave dielectric ceramic is +6ppm/. Degree.C.
The microwave dielectric ceramic obtained by the preparation method of the embodiment 1 has higher quality factor and medium dielectric constant, so that after the device is applied, the gain of the device is improved, and the loss of the device is reduced.
Example 2
The following describes a preparation method of microwave dielectric ceramic provided in embodiment 2 of the present application, where the method includes:
s101, srCO with preset molar ratio 3 、TiO 2 、Sm 2 O 3 、La 2 O 3 、Al 2 O 3 And CeO 2 And (3) placing the mixture in a preset device, adding a solvent, mixing, grinding and drying the mixture through a grinding medium to obtain a first mixture.
Specifically, the preset device may be a ball mill, and the solvent may be deionized water; the grinding media may be zirconia balls.
Specifically SrCO 3 、TiO 2 、Sm 2 O 3 、La 2 O 3 、Al 2 O 3 And CeO 2 The molar ratio of (c) is 0.43:0.265:0.055:0.055:0.11:0.085 in sequence.
And S102, calcining the first mixture for a preset time to obtain a second mixture.
Specifically, the calcination temperature of the calcination treatment was 1300 ℃.
Specifically, the preset time is 4 hours.
S103, placing the second mixture, the binder and the additive into a preset device, adding a solvent, and grinding by a grinding medium to obtain a target material.
Specifically, the binder may be an aqueous polyvinyl alcohol solution.
Specifically, the additive is MnCO 3 And Y 2 O 3 Wherein MnCO 3 The content of (C) is 0.75wt% of the mass of the second mixture, Y 2 O 3 The content of (2) was 0.2wt% of the second mixture.
The method adds MnCO with specific content in the process of preparing the microwave dielectric ceramic 3 And Y 2 O 3 The defects in ceramic sintering are more effectively controlled and Sr is promoted 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x And Sr 2 CeO 4 The ions in the mixture structure are orderly arranged, and the quality factor is improved.
S104, granulating the target material to obtain granules;
s105: carrying out compression molding treatment on the granulating material to obtain a ceramic biscuit;
s106: and (3) performing glue discharging sintering treatment on the ceramic biscuit to obtain the microwave dielectric ceramic comprising the ceramic base material. The ceramic base material comprises Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x And Sr 2 CeO 4 Is a mixture of Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x With Sr 2 CeO 4 The molar ratio of (1-y) is y, wherein x=0.45 and y=0.15.
Specifically, the temperature of the paste ejection sintering treatment includes 1540 ℃.
Specifically, the heat preservation time of the adhesive discharging sintering comprises 5 hours.
The dielectric constant of the microwave dielectric ceramic obtained by the preparation method of the embodiment 2 of the application is 40.5; the quality factor of the microwave dielectric ceramic is more than 61000; the resonant frequency temperature coefficient of the microwave dielectric ceramic is +2ppm/. Degree.C.
The microwave dielectric ceramic obtained by the preparation method of the embodiment 2 has higher quality factor and medium dielectric constant, so that after the device is applied, the gain of the device is improved, and the loss of the device is reduced.
Example 3
The following describes a preparation method of a microwave dielectric ceramic provided in embodiment 3 of the present application, where the method includes:
s101, srCO with preset molar ratio 3 、TiO 2 、Sm 2 O 3 、La 2 O 3 、Al 2 O 3 And CeO 2 And (3) placing the mixture in a preset device, adding a solvent, mixing, grinding and drying the mixture through a grinding medium to obtain a first mixture.
Specifically, the preset device may be a ball mill, and the solvent may be deionized water; the grinding media may be zirconia balls.
Specifically SrCO 3 、TiO 2 、Sm 2 O 3 、La 2 O 3 、Al 2 O 3 And CeO 2 Is of the mole of (2)The molar ratio was 0.39:0.27:0.07:0.07:0.14:0.06 in this order.
And S102, calcining the first mixture for a preset time to obtain a second mixture.
Specifically, the calcination temperature of the calcination treatment was 1300 ℃.
Specifically, the preset time is 4 hours.
S103, placing the second mixture, the binder and the additive into a preset device, adding a solvent, and grinding by a grinding medium to obtain a target material.
Specifically, the binder may be an aqueous polyvinyl alcohol solution.
Specifically, the additive is MnCO 3 And Y 2 O 3 Wherein MnCO 3 The content of (C) is 0.05wt% of the mass of the second mixture, Y 2 O 3 The content of (2) was 0.3wt% of the second mixture.
The method adds MnCO with specific content in the process of preparing the microwave dielectric ceramic 3 And Y 2 O 3 The defects in ceramic sintering are more effectively controlled and Sr is promoted 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x And Sr 2 CeO 4 The ions in the mixture structure are orderly arranged, and the quality factor is improved.
S104, granulating the target material to obtain granules;
s105: carrying out compression molding treatment on the granulating material to obtain a ceramic biscuit;
s106: and (3) performing glue discharging sintering treatment on the ceramic biscuit to obtain the microwave dielectric ceramic comprising the ceramic base material. The ceramic base material comprises Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x And Sr 2 CeO 4 Is a mixture of Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x With Sr 2 CeO 4 The molar ratio of (1-y) is y, wherein x=0.45 and y=0.15.
Specifically, the temperature of the adhesive discharging sintering treatment comprises 1580 ℃.
Specifically, the heat preservation time of the adhesive discharging sintering comprises 5 hours.
The dielectric constant of the microwave dielectric ceramic obtained by the preparation method of the embodiment 1 of the application is 35.1; the quality factor of the microwave dielectric ceramic is larger than 70500; the resonant frequency temperature coefficient of the microwave dielectric ceramic is-4 ppm/DEG C.
The microwave dielectric ceramic obtained by the preparation method of the embodiment 1 has higher quality factor and medium dielectric constant, so that after the device is applied, the gain of the device is improved, and the loss of the device is reduced.
Due to the technical scheme, the microwave dielectric ceramic and the preparation method thereof provided by the application have the following beneficial effects:
the application is realized by adding Sr 2 CeO 4 And changing the mole ratio of the mixture in the ceramic base material to obtain the microwave dielectric ceramic with higher quality factor and adjustable dielectric constant, which has wide application range and can be applied to various different microwave communication devices so as to reduce the cost for developing different devices, improve the gain of the devices and reduce the loss of the devices.
The foregoing description has fully disclosed the embodiments of this application. It should be noted that any modifications to the specific embodiments of the present application may be made by those skilled in the art without departing from the scope of the claims of the present application. Accordingly, the scope of the claims of the present application is not limited to the foregoing detailed description.
Claims (5)
1. A microwave dielectric ceramic is characterized by comprising a ceramic base material, wherein the ceramic base material comprises Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x And Sr 2 CeO 4 Is a mixture of said Sr 1-x (La 0.5 Sm 0.5 ) x Al x Ti 1-x With the Sr 2 CeO 4 The molar ratio of (1-y) is y, wherein x is more than or equal to 0.4 and less than or equal to 0.5, and y is more than or equal to 0.1 and less than or equal to 0.2; the molar ratio of La element to Sm element in the ceramic base material is 1:1; the ceramic base material is obtained by mixing and reacting a plurality of ceramic raw materials, and the ceramic base material is prepared byThe ceramic raw materials comprise the following raw materials: srCO 3 、TiO 2 、Sm 2 O 3 、La 2 O 3 、Al 2 O 3 And CeO 2 The method comprises the steps of carrying out a first treatment on the surface of the The dielectric constant of the microwave dielectric ceramic is between 35 and 45;
the preparation method of the microwave dielectric ceramic comprises the following steps:
SrCO in a predetermined molar ratio 3 、TiO 2 、Sm 2 O 3 、La 2 O 3 、Al 2 O 3 And CeO 2 Placing the mixture in a preset device, adding a solvent, mixing, grinding and drying the mixture through a grinding medium to obtain a first mixture;
calcining the first mixture for a preset time to obtain a second mixture;
placing the second mixture, the binder and the additive into a preset device, adding a solvent, and grinding by a grinding medium to obtain a target material;
and (5) performing forming processing treatment based on the target material to obtain the microwave dielectric ceramic comprising the ceramic base material.
2. The microwave dielectric ceramic of claim 1, wherein the SrCO 3 The TiO 2 The Sm is 2 O 3 The La is 2 O 3 Said Al 2 O 3 And the CeO 2 The molar ratio of (0.39-0.47), (0.26-0.27), (0.04-0.07), (0.08-0.14), (0.06-0.11) in turn, wherein the endpoint value is desirable.
3. The microwave dielectric ceramic of claim 1, wherein the additive is MnCO 3 And Y 2 O 3 。
4. A microwave dielectric ceramic according to claim 3, wherein the preparation method satisfies at least one of the following characteristics:
the MnCO 3 The content of the second mixture is 0.05-0.1wt% of the mass of the second mixture;
the Y is 2 O 3 The content of the second mixture is 0.1-0.3wt%.
5. The microwave dielectric ceramic of claim 1, wherein the method of preparation satisfies at least one of the following characteristics:
the calcination temperature of the calcination treatment is 1250-1350 ℃;
the preset time is 3-5h.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04209411A (en) * | 1990-12-04 | 1992-07-30 | Mitsubishi Electric Corp | Dielectric ceramic material for microwave |
| CN102603287A (en) * | 2012-03-15 | 2012-07-25 | 南京工业大学 | Microwave dielectric ceramic with intermediate dielectric constant and method for preparing microwave dielectric ceramic |
| CN105399422A (en) * | 2015-12-15 | 2016-03-16 | 广东国华新材料科技股份有限公司 | STLA microwave dielectric ceramic material and preparation method and application thereof |
| CN105693243A (en) * | 2015-12-30 | 2016-06-22 | 南京工业大学 | Preparation method of dielectric constant high-performance microwave dielectric ceramic |
| CN111635230A (en) * | 2020-05-28 | 2020-09-08 | 浙江大学 | High-quality-factor strontium cerate microwave dielectric ceramic material and preparation method thereof |
| CN113754434A (en) * | 2021-08-17 | 2021-12-07 | 浙江大学 | Strontium cerate-based microwave dielectric ceramic material with medium dielectric constant and preparation method thereof |
| WO2022188219A1 (en) * | 2021-03-10 | 2022-09-15 | 嘉兴佳利电子有限公司 | Stable-frequency low-dielectric microwave dielectric ceramic material and preparation method therefor |
-
2023
- 2023-02-22 CN CN202310148876.XA patent/CN116143514B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04209411A (en) * | 1990-12-04 | 1992-07-30 | Mitsubishi Electric Corp | Dielectric ceramic material for microwave |
| CN102603287A (en) * | 2012-03-15 | 2012-07-25 | 南京工业大学 | Microwave dielectric ceramic with intermediate dielectric constant and method for preparing microwave dielectric ceramic |
| CN105399422A (en) * | 2015-12-15 | 2016-03-16 | 广东国华新材料科技股份有限公司 | STLA microwave dielectric ceramic material and preparation method and application thereof |
| CN105693243A (en) * | 2015-12-30 | 2016-06-22 | 南京工业大学 | Preparation method of dielectric constant high-performance microwave dielectric ceramic |
| CN111635230A (en) * | 2020-05-28 | 2020-09-08 | 浙江大学 | High-quality-factor strontium cerate microwave dielectric ceramic material and preparation method thereof |
| WO2022188219A1 (en) * | 2021-03-10 | 2022-09-15 | 嘉兴佳利电子有限公司 | Stable-frequency low-dielectric microwave dielectric ceramic material and preparation method therefor |
| CN113754434A (en) * | 2021-08-17 | 2021-12-07 | 浙江大学 | Strontium cerate-based microwave dielectric ceramic material with medium dielectric constant and preparation method thereof |
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