CN102515746A - Microwave dielectrically-adjustable material of barium strontium titanate composite molybdate and preparation method for same - Google Patents
Microwave dielectrically-adjustable material of barium strontium titanate composite molybdate and preparation method for same Download PDFInfo
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Abstract
The invention belongs to the technical field of electronic material and device, and particularly discloses a microwave ceramic dielectric material of barium strontium titanate composite molybdate high in Q value and dielectrically adjustable, and preparation for the same. The chemical ingredients of the microwave ceramic dielectric material disclosed by the invention satisfy the following chemical formula: (1-x)%Ba<1-y>SryTiO3 + x%AMoO4, wherein A is selected from Ba, Sr, Ca, Mn, Mg, Zn and Co; x is not less than 0 and not greater than 100; and y ranges from 0.4 to 0.6. The adjustable microwave ceramic dielectric material disclosed by the invention has a high Q value, serialized dielectric constants and a certain dielectric adjustment rate, as well as can be used as a material for adjustable microwave components such as electrically-tuned microwave resonator, filter and microwave dielectric antenna.
Description
Technical field
The invention belongs to electronic material and device technology field; Be specifically related to a kind of high Q value, barium-strontium titanate-based microwave ceramic dielectric material that dielectric is adjustable, this material can be used to the material of adjustable microwave components and parts such as electronic tuning microwave resonator, wave filter and microwave-medium antenna.
Background technology
Have high-k, low-dielectric loss, nonlinear dielectric constant is adjustable with and the adjustable calcium titanium ore structure strontium-barium titanate ferroelectric material of Curie temperature aspect microwave adjustable device (like shifter, wave filter, VC and retarding line etc.) obtain increasingly extensive concern, especially at the focus of research at present especially aspect microwave phase shifter.But the BST stupalith with high-k is difficult to satisfy itself and driving source internal driving coupling and high-power requirement, this big limitations its application in the microwave adjustable device field.Therefore, how to prepare both had low-k, high Q value, the material system that has certain dielectric tunable characteristic again is technological difficulties.
At present, most researchers mainly forms composite structure through adding non-ferroelectric microwave dielectric material, reduces dielectric loss under specific inductivity and the microwave frequency band thereby reach, and makes it can be used for microwave adjustable device.Sengupta etc. have carried out systematic research and have applied for related u. s. the compound of BST and non-ferroelectric material MgO; Though the specific inductivity of this matrix material and loss have obtained reduction to a certain extent; But along with the increase of MgO content, the temperature dependent properties of its specific inductivity and dielectric tunable characteristic but sharply descend.Dong Xianlin etc. are at BST stupalith and Mg
2SiO
4-MgO has also done certain research work in compound aspect, also is not well solved about specific inductivity and this contradiction of dielectric adjustable mutual restriction of BST material.This seminar adopts MgAl in early days
2O
6, Mg
2TiO
4, MgAl
2O
4, MgB
2O
3Deng more compound than strontium-barium titanate with different mass, development obtains having low-k, high Q value and necessarily the compound aspect of ceramic medium material system of dielectric tunable characteristic do a lot of work, obtained very big progress.Yet, Ba
1-ySr
yTiO
3With AMoO with excellent microwave dielectric property
4(A=Ba, Sr, Ca, Mn, Mg, Zn, Co) (ε
r=8-10, Q*f, high energy reaches 89700GHz) compound and Dielectric Properties do not see relevant report as yet.
Summary of the invention
The purpose of this invention is to provide microwave ceramic dielectric material of a kind of high Q value, the compound molybdate of strontium-barium titanate that dielectric is adjustable and preparation method thereof.
The microwave ceramic dielectric material of high Q value of the present invention, the compound molybdate of strontium-barium titanate that dielectric is adjustable, its chemical ingredients meets chemical following formula (1-x) %Ba
1-ySr
yTiO
3+ x%AMoO
4, wherein, A is selected from Ba, Sr, Ca, Mn, Mg, Zn and Co; 0＜x＜100; Y=0.4～0.6.The mol ratio of each corresponding element of digitized representation in the element lower right corner; In the gross weight of the microwave ceramic dielectric material of high Q value, the compound molybdate of strontium-barium titanate that dielectric is adjustable, (1-x%) represent Ba respectively with x%
1-ySr
yTiO
3And AMoO
4Weight percentage.
Preferable, (1-x%) Ba of the microwave ceramic dielectric material of said high Q value, the compound molybdate of strontium-barium titanate that dielectric is adjustable
1-ySr
yTiO
3+ x%AMoO
4In: A is selected from Ba and Sr; X=10～40; Y=0.4～0.6.
The preparation method of the microwave ceramic dielectric material of high Q value of the present invention, the compound molybdate of strontium-barium titanate that dielectric is adjustable comprises the steps:
(1) prepares mixed powder through solid reaction process, be specially: select BaCO for use
3, SrCO
3, TiO
2, MoO
3With carbonate or the oxide compound of A be main raw material, according to (1-x%) Ba
1-ySr
yTiO3+x%AMoO
4In the stoichiometric ratio batching of Ba, Sr, Ti, A and Mo, confected materials is placed nylon ball grinder, add zirconia ball and ball-milling medium ball milling, the discharging oven dry is after obtain mixed powder after pre-burning and the grinding.
The present invention adopts traditional electronic ceramic powder preparation technology, prepares the mixed powder of the microwave ceramic dielectric material of high Q value, the compound molybdate of strontium-barium titanate that dielectric is adjustable through solid reaction process.
Preferable, in the step (1), said ball-milling medium is absolute ethyl alcohol or deionized water, the ball milling time is 20～24 hours.
Preferable, in the step (1), said calcined temperature is 1000 ℃～1300 ℃, the pre-burning time is 2-4 hour.
(2) in the mixed powder that obtains, add zirconia ball and ball-milling medium ball milling, sieve after the discharging oven dry.
Preferable, in the step (2), said ball-milling medium is absolute ethyl alcohol or deionized water, the ball milling time is 20～24 hours.
Preferable, in the step (2), the sieve order number that sieves after the discharging oven dry is 200 mesh sieves.
(3) adopt sticker that the powder after sieving in the step (2) is carried out granulation, press down at 10MPa～100MPa pressure and process the ceramic green sheet.The compacting of ceramic green sheet can be pressed into the ceramic green sheet of desired size size through the forming mould of different model.
Preferable, in the step (3), said sticker is that mass percent is 8%～10% Z 150PH (PVA) aqueous solution.
(4) with the ceramic green sheet that makes in the step (3) through 550 ℃～600 ℃ sticking processing of row after, carry out sintering at 1200 ℃～1500 ℃, be incubated the microwave ceramic dielectric material that obtains said high Q value, the compound molybdate of strontium-barium titanate that dielectric is adjustable after 2～4 hours.
Said ball milling material is meant the raw material of ball milling, and the raw material of ball milling is by BaCO in step (1)
3, SrCO
3, TiO
2And AMoO
4The mixing raw material of forming, step 2) raw material of ball milling is the mixed powder of pre-burning in.
During above-mentioned ball milling, the mass ratio of zirconia ball and ball milling material is (1.2～1.5): 1; The mass ratio of ball-milling medium absolute ethyl alcohol or deionized water and ball milling material is (1.5～3.0): 1.
The present invention adopts traditional electronic ceramic technology, adopts AMoO
4And Ba
1-ySr
yTiO
3Respective quality than composite modified, development obtains can be used for the high Q value of adjustable microwave device, (1-x%) Ba that dielectric is adjustable
1-ySr
yTiO3+x%AMoO
4(Ba, Sr, Ca, Mn, Mg, Zn and Co; Y=0.4～0.6.) ceramic medium material, it has following principal feature:
(1) Tc of ceramic medium material system of the present invention can be with Ba/Sr and Ba
1-ySr
yTiO
3And AMoO
4(A=Ba, Sr, Ca, Mn, Mg, Zn or Co; Y=0.4～0.6) mass ratio is adjustable continuously in very wide scope, can require the structure and the performance of adjustment material system according to the working temperature of the adjustable microwave device that is designed;
(2) through Ba/Sr and Ba
1-ySr
yTiO
3And AMoO
4(A=Ba, Sr, Ca, Mn, Mg, Zn or Co; Y=0.4～0.6) variation of component ratio, the specific inductivity of ceramic medium material can be adjustable continuously, can obtain the material system of specific inductivity seriation, widened the range of application of this ceramic medium material;
(3) microwave ceramic dielectric material of the compound molybdate of strontium-barium titanate of the present invention has high Q value, low specific inductivity, the adjustable rate of certain dielectric, and specific inductivity seriation;
(4) microwave ceramic dielectric material of the compound molybdate of strontium-barium titanate of the present invention, its chemical ingredients is with a cube Ba
1-ySr
yTiO
3With AMoO4 coexistence (four directions or monocline are mutually), has excellent microwave dielectric property;
(5) adopt traditional electronic ceramic technology, technology is simple, and cost is low, and this ceramic dielectric material system environment-protecting asepsis spinoff, and excellent performance is applicable to the exploitation and the design of adjustable microwave device.
The microwave ceramic dielectric material of high Q value of the present invention, the compound molybdate of strontium-barium titanate that dielectric is adjustable is used as adjustable microwave components and parts materials such as electronic tuning microwave resonator, wave filter and microwave-medium antenna.
Description of drawings
Fig. 1-a is 80%Ba
0.4Sr
0.6TiO
3+ 20%BaMoO
4The X-ray diffraction analysis collection of illustrative plates of dielectric adjustable microwave ceramic dielectric material;
Fig. 1-b is 80%Ba
0.5Sr
0.5TiO
3+ 20%SrMoO
4The X-ray diffraction analysis collection of illustrative plates of dielectric adjustable microwave ceramic dielectric material.
Fig. 2-a is 80%Ba
0.4Sr
0.6TiO
3+ 20%BaMoO
4The relation curve of the specific inductivity of dielectric adjustable microwave ceramic dielectric material and loss and temperature;
Fig. 2-b is 80%Ba
0.5Sr
0.5TiO
3+ 20%SrMoO
4The relation curve of the specific inductivity of dielectric adjustable microwave ceramic dielectric material and loss and temperature.
Fig. 3-a is 80%Ba
0.4Sr
0.6TiO
3+ 20%BaMoO
4The specific inductivity of dielectric adjustable microwave ceramic dielectric material and the relation curve of strength of electric field;
Fig. 3-b is 80%Ba
0.5Sr
0.5TiO
3+ 20%SrMoO
4The specific inductivity of dielectric adjustable microwave ceramic dielectric material and the relation curve of strength of electric field.
Ba among above-mentioned each figure
0.4Sr
0.6TiO
3Represent Ba with BST40
0.5Sr
0.5TiO
3Represent with BST50.
Embodiment
Further set forth the present invention below in conjunction with specific embodiment, should be understood that these embodiment only are used to the present invention is described and are not used in restriction protection scope of the present invention.
The high Q value of embodiment 1 preparation, the 80%Ba that dielectric is adjustable
0.4Sr
0.6TiO
3+ 20%BaMoO
4Ceramic medium material
According to 80%Ba
0.4Sr
0.6TiO
3+ 20%SrMoO
4In the stoichiometric ratio batching of Ba, Sr, Ti and Mo, take by weighing BaCO
3, SrCO
3, TiO
2, MoO
3Raw material (shown in table 1-a).
Raw material sources: BaCO
3(99.8%, Alfa Aesar China LTD.), SrCO
3(99.0%, Alfa Aesar China LTD.), TiO
2(99.9%, the high-new inorganic materials in Foshan ltd) and MoO
3(99.99%, Chemical Reagent Co., Ltd., Sinopharm Group).
Table 1-a 80%Ba
0.4Sr
0.6TiO
3+ 20%BaMoO
4The proportioning of ceramic medium material
| Prescription | Quality (g) |
| BaCO 3 | 44.3 |
| SrCO 3 | 34.7 |
| TiO 2 | 31.4 |
| MoO 3 | 9.6 |
The above-mentioned raw materials powder is placed nylon ball grinder; Add zirconia ball and absolute ethyl alcohol or deionized water, ball milling 24 hours, discharging oven dry back was 1000 ℃～1200 ℃ pre-burnings 4 hours; Powder after the grinding places nylon ball grinder; Add zirconia ball and absolute ethyl alcohol or deionized water, ball milling 24 hours, discharging oven dry back powder is crossed 200 mesh sieves; According to traditional electronic ceramic technology, Z 150PH (PVA) aqueous solution of employing 8% carries out granulation as sticker, and under 10MPa pressure, dry method is pressed into diameter
The right cylinder of green sheet and 10mm * 5mm, 12mm * 6mm, 15mm * 7mm, 18mm * 8mm, after 550 ℃ of sticking processing of row, sample is under air atmosphere, and sintering temperature is 1200 ℃～1400 ℃, is incubated after 4 hours, obtains 80%Ba
0.4Sr
0.6TiO
3+ 20%BaMoO
4Ceramics sample.The ceramics sample that makes is carried out thing phase and microstructure analysis earlier, to its polishing both surfaces, quilt silver, carry out the dielectric properties test behind the silver ink firing then, its relevant dielectric properties see Table 2-a.
Table 2-a.80%Ba
0.4Sr
0.6TiO
3+ 20%BaMoO
4The relevant dielectric properties of dielectric adjustable microwave ceramic dielectric material
The high Q value of embodiment 2 preparations, the 80%Ba that dielectric is adjustable
0.5Sr
0.5TiO
3+ 20%SrMoO
4Ceramic medium material
According to 80%Ba
0.5Sr
0.5TiO
3+ 20%SrMoO
4In the stoichiometric ratio of Ba, Sr, Ti and Mo, take by weighing BaCO
3, SrCO
3, TiO
2, MoO
3Raw material (shown in table 1-b).
Raw material sources: BaCO
3(99.8%, Alfa Aesar China LTD.), SrCO
3(99.0%, Alfa Aesar China LTD.), TiO
2(99.9%, the high-new inorganic materials in Foshan ltd) and MoO
3(99.99%, Chemical Reagent Co., Ltd., Sinopharm Group).
Table 1-b.80%Ba
0.5Sr
0.5TiO
3+ 20%SrMoO
4The proportioning of ceramic medium material
| Prescription | Quality (g) |
| BaCO 3 | 34.2 |
| SrCO 3 | 37.5 |
| TiO 2 | 27.7 |
| MoO 3 | 11 |
Above-mentioned powder is placed nylon ball grinder; Add zirconia ball and absolute ethyl alcohol or deionized water, ball milling 24 hours, discharging oven dry back was 1100 ℃～1300 ℃ pre-burnings 4 hours; Powder after the grinding places nylon ball grinder; Add zirconia ball and absolute ethyl alcohol or deionized water, ball milling 24 hours, discharging oven dry back powder is crossed 200 mesh sieves; According to traditional electronic ceramic technology, Z 150PH (PVA) aqueous solution of employing 8% carries out granulation as sticker, and under 10MPa pressure, dry method is pressed into diameter
The right cylinder of green sheet and 10mm * 5mm, 12mm * 6mm, 15mm * 7mm, 18mm * 8mm, after 550 ℃ of sticking processing of row, sample is under air atmosphere, and sintering temperature is 1300 ℃～1500 ℃, is incubated after 4 hours, obtains 80%Ba
0.5Sr
0.5TiO
3+ 20%SrMoO
4Ceramics sample.The ceramics sample that makes is carried out thing phase and microstructure analysis earlier, to its polishing both surfaces, quilt silver, carry out the dielectric properties test behind the silver ink firing then, its relevant dielectric properties see Table 2-b.
Table 2-b.80%Ba
0.5Sr
0.5TiO
3+ 20%SrMoO
4The relevant dielectric properties of dielectric adjustable microwave ceramic dielectric material
The high Q value of embodiment 3 preparations, the 70%Ba that dielectric is adjustable
0.6Sr
0.4TiO
3+ 30%SrMoO
4Ceramic medium material
According to 70%Ba
0.6Sr
0.4TiO
3+ 30%SrMoO
4In the stoichiometric ratio batching of Ba, Sr, Ti and Mo, take by weighing BaCO
3, SrCO
3, TiO
2, MoO
3Raw material (shown in table 1-c).
Raw material sources: BaCO
3(99.8%, Alfa Aesar China LTD.), SrCO
3(99.0%, Alfa Aesar China LTD.), TiO
2(99.9%, the high-new inorganic materials in Foshan ltd) and MoO
3(99.99%, Chemical Reagent Co., Ltd., Sinopharm Group).
Table 1-c 70%Ba
0.6Sr
0.4TiO
3+ 30%SrMoO
4The proportioning of ceramic medium material
| Prescription | Quality (g) |
| BaCO 3 | 38.8 |
| SrCO 3 | 37.3 |
| TiO 2 | 26.2 |
| MoO 3 | 17.4 |
The above-mentioned raw materials powder is placed nylon ball grinder; Add zirconia ball and absolute ethyl alcohol or deionized water, ball milling 20 hours, discharging oven dry back was 1200 ℃～1300 ℃ pre-burnings 2 hours; Powder after the grinding places nylon ball grinder; Add zirconia ball and absolute ethyl alcohol or deionized water, ball milling 20 hours, discharging oven dry back powder is crossed 200 mesh sieves; According to traditional electronic ceramic technology, Z 150PH (PVA) aqueous solution of employing 10% carries out granulation as sticker, and under 100MPa pressure, dry method is pressed into diameter
The right cylinder of green sheet and 10mm * 5mm, 12mm * 6mm, 15mm * 7mm, 18mm * 8mm, after 600 ℃ of sticking processing of row, sample is under air atmosphere, and sintering temperature is 1300 ℃～1500 ℃, is incubated after 2 hours, obtains 70%Ba
0.6Sr
0.4TiO
3+ 30%SrMoO
4Ceramics sample.The ceramics sample that makes is carried out thing phase and microstructure analysis earlier, to its polishing both surfaces, quilt silver, carry out the dielectric properties test behind the silver ink firing then, its relevant dielectric properties see Table 2-c.
Table 2-c.70%Ba
0.6Sr
0.4TiO
3+ 30%SrMoO
4The relevant dielectric properties of dielectric adjustable microwave ceramic dielectric material
Obtain following collection of illustrative plates and result through detecting: present embodiment 70%Ba
0.6Sr
0.4TiO
3+ 30%SrMoO
4The X-ray diffraction analysis collection of illustrative plates of dielectric adjustable microwave ceramic dielectric material in the material, the result shows that its composition is with a cube Ba
0.6Sr
0.4TiO
3Phase and cubic SrMoO
4The phase structure coexistence; Present embodiment 70%Ba
0.6Sr
0.4TiO
3+ 30%SrMoO
4The specific inductivity of middle dielectric adjustable microwave ceramic dielectric material and the relation curve of loss and temperature, the result shows stoichiometric ratio composite S rMoO
4The Curie peak is along with the increase of doping is moved to the low temperature direction; Present embodiment 70%Ba
0.6Sr
0.4TiO
3+ 30%SrMoO
4The specific inductivity of middle dielectric adjustable microwave ceramic dielectric material and the relation curve of strength of electric field, test result shows with SrMoO
4Compoundly still have certain dielectric adjustable.Obtain very ideal microwave property after compound.
The high Q value of embodiment 4 preparations, the 60%Ba that dielectric is adjustable
0.5Sr
0.5TiO
3+ 40%BaMoO
4Ceramic medium material
According to 60%Ba
0.5Sr
0.5TiO
3+ 40%BaMoO
4In the stoichiometric ratio batching of Ba, Sr, Ti and Mo, take by weighing BaCO
3, SrCO
3, TiO
2, MoO
3Raw material, its preparation method is identical with embodiment 1, obtains the high Q value of present embodiment, the 60%Ba that dielectric is adjustable
0.5Sr
0.5TiO
3+ 40%BaMoO
4Ceramic medium material.
Obtain following collection of illustrative plates and result through detecting: present embodiment 60%Ba
0.5Sr
0.5TiO
3+ 40%BaMoO
4The X-ray diffraction analysis collection of illustrative plates of dielectric adjustable microwave ceramic dielectric material in the material, the result shows that its composition is with a cube Ba
0.5Sr
0.5TiO
3Phase and cubic BaMoO
4The phase structure coexistence; Present embodiment 60%Ba
0.5Sr
0.5TiO
3+ 40%BaMoO
4The specific inductivity of middle dielectric adjustable microwave ceramic dielectric material and the relation curve of loss and temperature, the result shows the compound BaMoO of stoichiometric ratio
4The Curie peak is along with the increase of doping is moved to the high temperature direction; Present embodiment 60%Ba
0.5Sr
0.5TiO
3+ 40%BaMoO
4The specific inductivity of middle dielectric adjustable microwave ceramic dielectric material and the relation curve of strength of electric field, test result shows with BaMoO
4Compoundly still have certain dielectric adjustable.Obtain very ideal microwave property after compound.
The high Q value of embodiment 5 preparations, the 60%Ba that dielectric is adjustable
0.8Sr
0.2TiO
3+ 40%SrMoO
4Ceramic medium material
According to 60%Ba
0.8Sr
0.2TiO
3+ 40%SrMoO
4In the stoichiometric ratio batching of Ba, Sr, Ti and Mo, take by weighing BaCO
3, SrCO
3, TiO
2, MoO
3Raw material, its preparation method is identical with embodiment 2, obtains the high Q value of present embodiment, the 60%Ba that dielectric is adjustable
0.8Sr
0.2TiO
3+ 40%SrMoO
4Ceramic medium material.
Obtain following collection of illustrative plates and result through detecting: present embodiment 60%Ba
0.8Sr
0.2TiO
3+ 40%SrMoO
4The X-ray diffraction analysis collection of illustrative plates of dielectric adjustable microwave ceramic dielectric material in the material, the result shows that its composition is with a cube Ba
0.8Sr
0.2TiO
3Phase and cubic SrMoO
4The phase structure coexistence; Present embodiment 60%Ba
0.8Sr
0.2TiO
3+ 40%SrMoO
4The specific inductivity of middle dielectric adjustable microwave ceramic dielectric material and the relation curve of loss and temperature, the result shows stoichiometric ratio composite S rMoO
4The Curie peak is along with the increase of doping is moved to the low temperature direction; Present embodiment 60%Ba
0.8Sr
0.2TiO
3+ 40%SrMoO
4The specific inductivity of middle dielectric adjustable microwave ceramic dielectric material and the relation curve of strength of electric field, test result shows with SrMoO
4Compoundly still have certain dielectric adjustable.Obtain very ideal microwave property after compound.
The high Q value of embodiment 6 preparations, the 90%Ba that dielectric is adjustable
0.4Sr
0.6TiO
3+ 10%BaMoO
4Ceramic medium material
According to 90%Ba
0.4Sr
0.6TiO
3+ 10%BaMoO
4In the stoichiometric ratio batching of Ba, Sr, Ti and Mo, take by weighing BaCO
3, SrCO
3, TiO
2, MoO
3Raw material, its preparation method is identical with embodiment 1, obtains the high Q value of present embodiment, the 90%Ba that dielectric is adjustable
0.4Sr
0.6TiO
3+ 10%BaMoO
4Ceramic medium material.
Obtain following collection of illustrative plates and result through detecting: present embodiment 90%Ba
0.4Sr
0.6TiO
3+ 10%BaMoO
4The X-ray diffraction analysis collection of illustrative plates of dielectric adjustable microwave ceramic dielectric material in the material, the result shows that its composition is with a cube Ba
0.4Sr
0.6TiO
3Phase and cubic BaMoO
4The phase structure coexistence; Present embodiment 90%Ba
0.4Sr
0.6TiO
3+ 10%BaMoO
4The specific inductivity of middle dielectric adjustable microwave ceramic dielectric material and the relation curve of loss and temperature, the result shows the compound BaMoO of stoichiometric ratio
4The Curie peak is along with the increase of doping is moved to the high temperature direction; Present embodiment 90%Ba
0.4Sr
0.6TiO
3+ 10%BaMoO
4The specific inductivity of middle dielectric adjustable microwave ceramic dielectric material and the relation curve of strength of electric field, test result shows with BaMoO
4Compoundly still have certain dielectric adjustable.Obtain very ideal microwave property after compound.
The high Q value of embodiment 7 preparations, the 80%Ba that dielectric is adjustable
0.4Sr
0.6TiO
3+ 20%CaMoO
4Ceramic medium material
According to 80%Ba
0.4Sr
0.6TiO
3+ 20%CaMoO
4In the stoichiometric ratio batching of Ba, Sr, Ti, Ca and Mo, take by weighing BaCO
3, SrCO
3, TiO
2, CaCO
3, MoO
3Raw material, its preparation method is identical with embodiment 1, obtains the high Q value of present embodiment, the 80%Ba that dielectric is adjustable
0.4Sr
0.6TiO
3+ 20%CaMoO
4Ceramic medium material.
Obtain following collection of illustrative plates and result through detecting: present embodiment 80%Ba
0.4Sr
0.6TiO
3+ 20%CaMoO
4The X-ray diffraction analysis collection of illustrative plates of dielectric adjustable microwave ceramic dielectric material in the material, the result shows that its composition is with a cube Ba
0.4Sr
0.6TiO
3Phase and cubic CaMoO
4The phase structure coexistence; Present embodiment 80%Ba
0.4Sr
0.6TiO
3+ 20%CaMoO
4The specific inductivity of middle dielectric adjustable microwave ceramic dielectric material and the relation curve of loss and temperature, the result shows stoichiometric ratio complex Ca MoO
4The Curie peak is along with the increase of doping is moved to the low temperature direction; Present embodiment 80%Ba
0.4Sr
0.6TiO
3+ 20%CaMoO
4The specific inductivity of middle dielectric adjustable microwave ceramic dielectric material and the relation curve of strength of electric field, test result shows with CaMoO
4Compoundly still have certain dielectric adjustable.Obtain very ideal microwave property after compound.
The high Q value of embodiment 8 preparations, the 80%Ba that dielectric is adjustable
0.4Sr
0.6TiO
3+ 20%MnMoO
4Ceramic medium material
According to 80%Ba
0.4Sr
0.6TiO
3+ 20%MnMoO
4In the stoichiometric ratio batching of Ba, Sr, Ti, Mn and Mo, take by weighing BaCO
3, SrCO
3, TiO
2, MnO
2, MoO
3Raw material, its preparation method is identical with embodiment 1, obtains the high Q value of present embodiment, the 80%Ba that dielectric is adjustable
0.4Sr
0.6TiO
3+ 20%MnMoO
4Ceramic medium material.
Obtain following collection of illustrative plates and result through detecting: present embodiment 80%Ba
0.4Sr
0.6TiO
3+ 20%MnMoO
4The X-ray diffraction analysis collection of illustrative plates of dielectric adjustable microwave ceramic dielectric material in the material, the result shows that its composition is with a cube Ba
0.4Sr
0.6TiO
3Phase and monocline MnMoO
4The phase structure coexistence; Present embodiment 80%Ba
0.4Sr
0.6TiO
3+ 20%MnMoO
4The specific inductivity of middle dielectric adjustable microwave ceramic dielectric material and the relation curve of loss and temperature, the result shows the compound MnMoO of stoichiometric ratio
4The Curie peak is along with the increase of doping is moved to the low temperature direction; Present embodiment 80%Ba
0.4Sr
0.6TiO
3+ 20%MnMoO
4The specific inductivity of middle dielectric adjustable microwave ceramic dielectric material and the relation curve of strength of electric field, test result shows with MnMoO
4Compoundly still have certain dielectric adjustable.Obtain very ideal microwave property after compound.
The high Q value of embodiment 9 preparations, the 80%Ba that dielectric is adjustable
0.4Sr
0.6TiO
3+ 20%MgMoO
4Ceramic medium material
According to 80%Ba
0.4Sr
0.6TiO
3+ 20%MgMoO
4In the stoichiometric ratio batching of Ba, Sr, Ti, Mg and Mo, take by weighing BaCO
3, SrCO
3, TiO
2, MgO, MoO
3Raw material, its preparation method is identical with embodiment 1, obtains the high Q value of present embodiment, the 80%Ba that dielectric is adjustable
0.4Sr
0.6TiO
3+ 20%MgMoO
4Ceramic medium material.
Obtain following collection of illustrative plates and result through detecting: present embodiment 80%Ba
0.4Sr
0.6TiO
3+ 20%MgMoO
4The X-ray diffraction analysis collection of illustrative plates of dielectric adjustable microwave ceramic dielectric material in the material, the result shows that its composition is with a cube Ba
0.4Sr
0.6TiO
3Phase and monocline MgMoO
4The phase structure coexistence; Present embodiment 80%Ba
0.4Sr
0.6TiO
3+ 20%MgMoO
4The specific inductivity of middle dielectric adjustable microwave ceramic dielectric material and the relation curve of loss and temperature, the result shows the compound MgMoO of stoichiometric ratio
4The Curie peak is along with the increase of doping is moved to the low temperature direction; Present embodiment 80%Ba
0.4Sr
0.6TiO
3+ 20%MgMoO
4The specific inductivity of middle dielectric adjustable microwave ceramic dielectric material and the relation curve of strength of electric field, test result shows with MgMoO
4Compoundly still have certain dielectric adjustable.Obtain very ideal microwave property after compound.
The high Q value of embodiment 10 preparations, the 80%Ba that dielectric is adjustable
0.4Sr
0.6TiO
3+ 20%ZnMoO
4Ceramic medium material
According to 80%Ba
0.4Sr
0.6TiO
3+ 20%MgMoO
4In the stoichiometric ratio batching of Ba, Sr, Ti, Zn and Mo, take by weighing BaCO
3, SrCO
3, TiO
2, ZnO, MoO
3Raw material, its preparation method is identical with embodiment 1, obtains the high Q value of present embodiment, the 80%Ba that dielectric is adjustable
0.4Sr
0.6TiO
3+ 20%ZnMoO
4Ceramic medium material.
Obtain following collection of illustrative plates and result through detecting: present embodiment 80%Ba
0.4Sr
0.6TiO
3+ 20%ZnMoO
4The X-ray diffraction analysis collection of illustrative plates of dielectric adjustable microwave ceramic dielectric material in the material, the result shows that its composition is with a cube Ba
0.4Sr
0.6TiO
3Phase and monocline ZnMoO
4The phase structure coexistence; Present embodiment 80%Ba
0.4Sr
0.6TiO
3+ 20%ZnMoO
4The specific inductivity of middle dielectric adjustable microwave ceramic dielectric material and the relation curve of loss and temperature, the result shows the compound ZnMoO of stoichiometric ratio
4The Curie peak is along with the increase of doping is moved to the low temperature direction; Present embodiment 80%Ba
0.4Sr
0.6TiO
3+ 20%ZnMoO
4The specific inductivity of middle dielectric adjustable microwave ceramic dielectric material and the relation curve of strength of electric field, test result shows with ZnMoO
4Compoundly still have certain dielectric adjustable.Obtain very ideal microwave property after compound.
The high Q value of embodiment 11 preparations, the 80%Ba that dielectric is adjustable
0.4Sr
0.6TiO
3+ 20%CoMoO
4Ceramic medium material
According to 80%Ba
0.4Sr
0.6TiO
3+ 20%CoMoO
4In the stoichiometric ratio batching of Ba, Sr, Ti, Co and Mo, take by weighing BaCO
3, SrCO
3, TiO
2, Co
2O
3, MoO
3Raw material, its preparation method is identical with embodiment 1, obtains the high Q value of present embodiment, the 80%Ba that dielectric is adjustable
0.4Sr
0.6TiO
3+ 20%CoMoO
4Ceramic medium material.
Obtain following collection of illustrative plates and result through detecting: present embodiment 80%Ba
0.4Sr
0.6TiO
3+ 20%CoMoO
4The X-ray diffraction analysis collection of illustrative plates of dielectric adjustable microwave ceramic dielectric material in the material, the result shows that its composition is with a cube Ba
0.4Sr
0.6TiO
3Phase and monocline CoMoO
4The phase structure coexistence; Present embodiment 80%Ba
0.4Sr
0.6TiO
3+ 20%CoMoO
4The specific inductivity of middle dielectric adjustable microwave ceramic dielectric material and the relation curve of loss and temperature, the result shows the compound CoMoO of stoichiometric ratio
4The Curie peak is along with the increase of doping is moved to the low temperature direction; Present embodiment 80%Ba
0.4Sr
0.6TiO
3+ 20%CoMoO
4The specific inductivity of middle dielectric adjustable microwave ceramic dielectric material and the relation curve of strength of electric field, test result shows with CoMoO
4Compoundly still have certain dielectric adjustable.Obtain very ideal microwave property after compound.
Claims (7)
1. the microwave ceramic dielectric material of the adjustable compound molybdate of strontium-barium titanate of a dielectric, its chemical ingredients meets chemical following formula (1-x%) Ba
1-ySr
yTiO
3+ x%AMoO
4, wherein, A is selected from Ba, Sr, Ca, Mn, Mg, Zn and Co; 0＜x＜100; Y=0.4～0.6.
2. like the microwave ceramic dielectric material of the adjustable compound molybdate of strontium-barium titanate of claims 1 described dielectric, it is characterized in that (1-x%) Ba of the microwave ceramic dielectric material of the compound molybdate of strontium-barium titanate that said dielectric is adjustable
1-ySr
yTiO
3+ x%AMoO
4In, A is Ba or Sr; X=10～40; Y=0.4～0.6.
3. like the preparation method of the microwave ceramic dielectric material of the adjustable compound molybdate of strontium-barium titanate of claims 1 or 2 described dielectrics, comprise the steps:
(1) prepares mixed powder through solid reaction process, be specially: select BaCO for use
3, SrCO
3, TiO
2, MoO
3With carbonate or the oxide compound of A be main raw material, according to (1-x%) Ba
1-ySr
yTiO3+x%AMoO
4In the stoichiometric ratio batching of Ba, Sr, Ti, A and Mo, confected materials is placed nylon ball grinder, add zirconia ball and ball-milling medium ball milling, the discharging oven dry is after obtain mixed powder after pre-burning and the grinding;
(2) adding zirconia ball and ball-milling medium carry out ball milling in the mixed powder that obtains, and sieve after the discharging oven dry;
(3) adopt sticker that the powder after sieving in the step (2) is carried out granulation, press down at 10MPa～100MPa pressure and process the ceramic green sheet;
(4) with the ceramic green sheet that makes in the step (3) through 550 ℃～600 ℃ sticking processing of row after, carry out sintering at 1200 ℃～1500 ℃, be incubated the microwave ceramic dielectric material that obtains the adjustable compound molybdate of strontium-barium titanate of said dielectric after 2～4 hours.
4. like the preparation method of the microwave ceramic dielectric material of the adjustable compound molybdate of strontium-barium titanate of claims 3 described dielectrics; It is characterized in that; In step (1) and the step (2), said ball-milling medium is absolute ethyl alcohol or deionized water, and the ball milling time is 20～24 hours.
5. like the preparation method of the microwave ceramic dielectric material of the adjustable compound molybdate of strontium-barium titanate of claims 3 described dielectrics, it is characterized in that in the step (1), said calcined temperature is 1000 ℃～1300 ℃, the pre-burning time is 2-4 hour.
6. like the preparation method of the microwave ceramic dielectric material of the adjustable compound molybdate of strontium-barium titanate of claims 3 described dielectrics, it is characterized in that in the step (3), said sticker is that mass percent is 8%～10% polyvinyl alcohol water solution.
7. like the application of microwave ceramic dielectric material in the adjustable microwave components and parts of electronic tuning microwave resonator, wave filter and microwave-medium antenna of the adjustable compound molybdate of strontium-barium titanate of claims 1 or 2 described dielectrics.
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| CN105000882A (en) * | 2015-07-24 | 2015-10-28 | 天津大学 | Low-inherent-sintering-temperature low-loss-temperature stable microwave dielectric ceramic material |
| CN106242559A (en) * | 2016-08-01 | 2016-12-21 | 桂林理工大学 | A kind of titanate SrCr3inTi2o11application as temperature-stable microwave dielectric ceramic |
| CN111925207A (en) * | 2020-07-08 | 2020-11-13 | 杭州电子科技大学 | Mg3B2O6-Ba3(VO4)2Composite ceramic material and preparation method thereof |
| JP2021158276A (en) * | 2020-03-27 | 2021-10-07 | 太陽誘電株式会社 | Ceramic raw material powder, ceramic electronic component manufacturing method, and ceramic raw material powder manufacturing method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104520969A (en) * | 2012-07-09 | 2015-04-15 | 东芝北斗电子株式会社 | Plasma emission device, and electromagnetic wave generator employed in same |
| CN105000882A (en) * | 2015-07-24 | 2015-10-28 | 天津大学 | Low-inherent-sintering-temperature low-loss-temperature stable microwave dielectric ceramic material |
| CN106242559A (en) * | 2016-08-01 | 2016-12-21 | 桂林理工大学 | A kind of titanate SrCr3inTi2o11application as temperature-stable microwave dielectric ceramic |
| JP2021158276A (en) * | 2020-03-27 | 2021-10-07 | 太陽誘電株式会社 | Ceramic raw material powder, ceramic electronic component manufacturing method, and ceramic raw material powder manufacturing method |
| CN111925207A (en) * | 2020-07-08 | 2020-11-13 | 杭州电子科技大学 | Mg3B2O6-Ba3(VO4)2Composite ceramic material and preparation method thereof |
| CN111925207B (en) * | 2020-07-08 | 2022-06-07 | 杭州电子科技大学 | Mg3B2O6-Ba3(VO4)2Composite ceramic material and preparation method thereof |
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