CN110451952A - A kind of low loss and high strength microwave-medium ceramics and preparation method thereof - Google Patents
A kind of low loss and high strength microwave-medium ceramics and preparation method thereof Download PDFInfo
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- 239000000919 ceramic Substances 0.000 title claims abstract description 68
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 239000000126 substance Substances 0.000 claims abstract description 62
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000005245 sintering Methods 0.000 claims abstract description 8
- 238000000498 ball milling Methods 0.000 claims description 92
- 229910052593 corundum Inorganic materials 0.000 claims description 78
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 68
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 68
- 238000007873 sieving Methods 0.000 claims description 61
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 46
- 239000004615 ingredient Substances 0.000 claims description 46
- 238000002156 mixing Methods 0.000 claims description 45
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 44
- FKTOIHSPIPYAPE-UHFFFAOYSA-N samarium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Sm+3].[Sm+3] FKTOIHSPIPYAPE-UHFFFAOYSA-N 0.000 claims description 44
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 44
- 238000001035 drying Methods 0.000 claims description 37
- 239000010431 corundum Substances 0.000 claims description 34
- 229910002971 CaTiO3 Inorganic materials 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 14
- 238000000748 compression moulding Methods 0.000 claims description 12
- 238000004321 preservation Methods 0.000 claims description 9
- 229910010293 ceramic material Inorganic materials 0.000 abstract description 2
- 238000011056 performance test Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 210000003739 neck Anatomy 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention discloses a kind of low loss and high strength microwave-medium ceramics, composition expression formula is xCaTiO3‑ySmAlO3‑(1‑x‑y)CaSmAlTiO6, wherein x, y, (1-x-y) represent molar ratio, x=0.6,0≤y < 0.4.The invention also discloses a kind of preparation methods of low loss and high strength microwave-medium ceramics.In microwave-medium ceramics provided by the invention, CaSmAlTiO is used6Partly or entirely replace SmAlO3, so as to while reducing dielectric constant, improve temperature stability, and by improving sintering temperature, increase it and process intensity；CaSmAlTiO6And SmAlO3The dielectric constant of two kinds of substances is close, and CaSmAlTiO6Temperature coefficient of resonance frequency nearlyr zero, and CaSmAlTiO6Hardness more increase, pass through CaSmAlTiO6Partly or entirely replace SmAlO3, and the available dielectric constant of proportion for adjusting component is 35 or so, and the high-hardness ceramic material of low and temperature coefficient of resonance frequency nearly zero is lost.
Description
Technical field
The invention belongs to electronic ceramics and its preparation technical fields, and in particular, to a kind of low loss and high strength microwave Jie
Matter ceramics and preparation method thereof.
Background technique
Microwave-medium ceramics refer to and complete one or more kinds of functions as dielectric material applied in microwave frequency band circuit
Ceramics, be widely used in modern communications, as far as satellite communication, satellite remote sensing device, closely to mobile communication, GPS navigation,
Tv cable system etc., it has also become indispensable a part in modern people's life.It is special with the fast development of microwave communication
It is not in face of upcoming 5G epoch, developed microwave dielectric material loss, temperature stability and processing intensity aspect
All be unable to satisfy following application demand, it is therefore necessary to develop appropriate dielectric constant, low-loss, Gao Jiagong intensity microwave be situated between
Material.
From the point of view of microwave dielectric property, 5G requires material to have medium dielectric constant microwave medium, Gao Pin with microwave-medium ceramics
Prime factor and nearly zero temperature coefficient of resonance frequency and higher processing intensity.MTiO3-LnA1O3With excellent microwave
The adjustability of energy and perovskite structure, so increasing to the research of the system microwave-medium ceramics in recent years.
But this perovskite-like structure, microwave-medium ceramics are when temperature coefficient of resonance frequency is zero, dielectric constant 50,
Quality factor are about 40000GHz or so, this its dielectric constant for present 5G application is excessively high, quality factor it is lower and
And it processes the standard that intensity is also unable to reach 5G microwave-medium ceramics.
Summary of the invention
In order to solve the above technical problems, the purpose of the present invention is to provide a kind of low loss and high strength microwave-medium ceramics and
Preparation method；The ceramic dielectric constant is medium, applied widely, and loss is low, and temperature coefficient of resonance frequency is adjustable, adds
Work intensity is high.
To realize above-mentioned technical purpose and the technique effect, the invention is realized by the following technical scheme:
A kind of low loss and high strength microwave-medium ceramics, the composition expression formula of the microwave-medium ceramics are xCaTiO3-
ySmAlO3-(1-x-y)CaSmAlTiO6, wherein x, y, (1-x-y) represent molar ratio, x=0.6,0≤y < 0.4.
Preferably, in the composition expression formula of above-mentioned microwave-medium ceramics, 0≤y < 0.35.
The present invention also provides a kind of preparation methods of low loss and high strength microwave-medium ceramics, comprising the following steps:
(1) first by TiO2And CaCO3According to chemical formula CaTiO3In corresponding element molar ratio ingredient, by TiO2With
CaCO3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible and are roasted, obtain CaTiO after ball milling3Combination
Object；
(2) by Sm2O3And Al2O3According to chemical formula SmAlO3In corresponding element molar ratio ingredient, by Sm2O3And Al2O3
Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible and are roasted, obtain SmAlO after ball milling3Composition；
(3) by TiO2、CaCO3、Sm2O3、Al2O3By chemical formula CaSmAlTiO6In corresponding element molar ratio ingredient,
By TiO2、CaCO3、Sm2O3、Al2O3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible and are roasted after ball milling
It burns, obtaining chemical formula is CaSmAlTiO6Composition；
(4) CaTiO that will be obtained3Composition, SmAlO3Composition and CaSmAlTiO6Composition is according to chemical formula
xCaTiO3-ySmAlO3-(1-x-y)CaSmAlTiO6In molar ratio ingredient, abundant ball milling after mixing dries after ball milling, makes
Grain, sieving, by the particle compression moulding after sieving, then sintering obtains the low loss and high strength microwave-medium ceramics, wherein should
Chemical formula xCaTiO3-ySmAlO3-(1-x-y)CaSmAlTiO6In, x, y, (1-x-y) represents molar ratio, x=0.6,0≤y
< 0.4.
Preferably, the roasting process in step (1) is 3~5h of roasting heat preservation at 1000~1100 DEG C.
Preferably, the roasting process in step (2) is 3~5h of roasting heat preservation at 1000~1100 DEG C.
Preferably, the roasting process in step (3) is 3~5h of roasting heat preservation at 1000~1100 DEG C.
Preferably, in step (4), it is highly the cylindrical body of 6mm that it is 10mm that the particle after sieving, which is pressed into diameter,.
Preferably, the sintering process in step (4) is sintered 4 hours at 1400~1500 DEG C.
Compared with prior art, it the invention has the following advantages: in microwave-medium ceramics provided by the invention, uses
CaSmAlTiO6Partly or entirely replace SmAlO3, so as to while reducing dielectric constant, improve temperature stability, and
And by improving sintering temperature, increases it and process intensity；CaSmAlTiO6And SmAlO3The dielectric constant of two kinds of substances is close, and
CaSmAlTiO6Temperature coefficient of resonance frequency nearlyr zero, and CaSmAlTiO6Hardness more increase, pass through CaSmAlTiO6
Partly or entirely replace SmAlO3, and the available dielectric constant of proportion for adjusting component is 35 or so, and low and resonance frequency is lost
The high-hardness ceramic material of rate temperature coefficient nearly zero.
The relative dielectric constant of microwave-medium ceramics provided by the invention is 33-38, microwave property Qf=44000-
61000GHz, temperature coefficient of resonance frequency is adjustable, bending strength >=240MPa.
Specific embodiment
The preferred embodiments of the present invention will be described in detail below so that advantages and features of the invention can be easier to by
It will be appreciated by those skilled in the art that so as to make a clearer definition of the protection scope of the present invention.
A kind of low loss and high strength microwave-medium ceramics, the composition expression formula of the microwave-medium ceramics are xCaTiO3-
ySmAlO3-(1-x-y)CaSmAlTiO6, wherein x, y, (1-x-y) represent molar ratio, x=0.6,0≤y < 0.4.
Preferably, in the composition expression formula of above-mentioned microwave-medium ceramics, 0≤y < 0.35.
The present invention also provides a kind of preparation methods of low loss and high strength microwave-medium ceramics, comprising the following steps:
(1) first by TiO2And CaCO3According to chemical formula CaTiO3In corresponding element molar ratio ingredient, by TiO2With
CaCO3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible and are roasted, obtain CaTiO after ball milling3Combination
Object；
(2) by Sm2O3And Al2O3According to chemical formula SmAlO3In corresponding element molar ratio ingredient, by Sm2O3And Al2O3
Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible and are roasted, obtain SmAlO after ball milling3Composition；
(3) by TiO2、CaCO3、Sm2O3、Al2O3By chemical formula CaSmAlTiO6In corresponding element molar ratio ingredient,
By TiO2、CaCO3、Sm2O3、Al2O3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible and are roasted after ball milling
It burns, obtaining chemical formula is CaSmAlTiO6Composition；
(4) CaTiO that will be obtained3Composition, SmAlO3Composition and CaSmAlTiO6Composition is according to chemical formula
xCaTiO3-ySmAlO3-(1-x-y)CaSmAlTiO6In molar ratio ingredient, abundant ball milling after mixing dries after ball milling, makes
Grain, sieving, by the particle compression moulding after sieving, then sintering obtains the low loss and high strength microwave-medium ceramics, wherein should
Chemical formula xCaTiO3-ySmAlO3-(1-x-y)CaSmAlTiO6In, x, y, (1-x-y) represents molar ratio, x=0.6,0≤y
< 0.4.
Wherein, the roasting process in step (1) is 3~5h of roasting heat preservation at 1000~1100 DEG C.
Wherein, the roasting process in step (2) is 3~5h of roasting heat preservation at 1000~1100 DEG C.
Wherein, the roasting process in step (3) is 3~5h of roasting heat preservation at 1000~1100 DEG C.
Wherein, in step (4), it is highly the cylindrical body of 6mm that it is 10mm that the particle after sieving, which is pressed into diameter,.
Wherein, the sintering process in step (4) is sintered 4 hours at 1400~1500 DEG C.
The present invention is further illustrated for embodiment below, but is not intended to limit the present invention.
Embodiment 1
The preparation method of the low loss and high strength microwave-medium ceramics of the present embodiment 1, includes the following steps:
(1) first by TiO2And CaCO3According to chemical formula CaTiO3In corresponding element molar ratio ingredient, by TiO2With
CaCO3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, roast 4h at 1100 DEG C, obtain after ball milling
CaTiO3Composition；
(2) by TiO2、CaCO3、Sm2O3、Al2O3By chemical formula CaSmAlTiO6In corresponding element molar ratio ingredient,
By TiO2、CaCO3、Sm2O3、Al2O3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, In after ball milling
4h is roasted at 1100 DEG C, obtaining chemical formula is CaSmAlTiO6Composition；
(4) CaTiO that will be obtained3Composition and CaSmAlTiO6Composition is according to chemical formula 0.6CaTiO3-
0.4CaSmAlTiO6In molar ratio ingredient, abundant ball milling after mixing, drying after ball milling is granulated, sieving, by after sieving
Then grain compression moulding is sintered 4h at 1500 DEG C and obtains the low loss and high strength microwave-medium ceramics.
The microwave-medium ceramics that the embodiment 1 obtains be can be carried out into survey to its microwave dielectric property using microwave network analyzer
Examination, the performance test results are as shown in Table 1.
Embodiment 2
The preparation method of the low loss and high strength microwave-medium ceramics of the present embodiment 2, includes the following steps:
(1) first by TiO2And CaCO3According to chemical formula CaTiO3In corresponding element molar ratio ingredient, by TiO2With
CaCO3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, roast 4h at 1100 DEG C, obtain after ball milling
CaTiO3Composition；
(2) by Sm2O3And Al2O3According to chemical formula SmAlO3In corresponding element molar ratio ingredient, by Sm2O3And Al2O3
Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, roast 4h at 1100 DEG C, obtain SmAlO after ball milling3
Composition；
(3) by TiO2、CaCO3、Sm2O3、Al2O3By chemical formula CaSmAlTiO6In corresponding element molar ratio ingredient,
By TiO2、CaCO3、Sm2O3、Al2O3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, In after ball milling
4h is roasted at 1100 DEG C, obtaining chemical formula is CaSmAlTiO6Composition；
(4) CaTiO that will be obtained3Composition, SmAlO3Composition and CaSmAlTiO6Composition is according to chemical formula
0.6CaTiO3-0.05SmAlO3-0.35CaSmAlTiO6In molar ratio ingredient, abundant ball milling after mixing dries after ball milling, makes
Then particle compression moulding after sieving is sintered at 1500 DEG C 4h and obtains the low loss and high strength microwave-medium by grain, sieving
Ceramics.
The microwave-medium ceramics that the embodiment 2 obtains be can be carried out into survey to its microwave dielectric property using microwave network analyzer
Examination, the performance test results are as shown in Table 1.
Embodiment 3
The preparation method of the low loss and high strength microwave-medium ceramics of the present embodiment 3, includes the following steps:
(1) first by TiO2And CaCO3According to chemical formula CaTiO3In corresponding element molar ratio ingredient, by TiO2With
CaCO3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, roast 4h at 1100 DEG C, obtain after ball milling
CaTiO3Composition；
(2) by Sm2O3And Al2O3According to chemical formula SmAlO3In corresponding element molar ratio ingredient, by Sm2O3And Al2O3
Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, roast 4h at 1100 DEG C, obtain SmAlO after ball milling3
Composition；
(3) by TiO2、CaCO3、Sm2O3、Al2O3By chemical formula CaSmAlTiO6In corresponding element molar ratio ingredient,
By TiO2、CaCO3、Sm2O3、Al2O3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, In after ball milling
4h is roasted at 1100 DEG C, obtaining chemical formula is CaSmAlTiO6Composition；
(4) CaTiO that will be obtained3Composition, SmAlO3Composition and CaSmAlTiO6Composition is according to chemical formula
0.6CaTiO3-0.1SmAlO3-0.3CaSmAlTiO6In molar ratio ingredient, abundant ball milling after mixing dries after ball milling, makes
Then particle compression moulding after sieving is sintered at 1480 DEG C 4h and obtains the low loss and high strength microwave-medium by grain, sieving
Ceramics.
The microwave-medium ceramics that the embodiment 3 obtains be can be carried out into survey to its microwave dielectric property using microwave network analyzer
Examination, the performance test results are as shown in Table 1.
Embodiment 4
The preparation method of the low loss and high strength microwave-medium ceramics of the present embodiment 4, includes the following steps:
(1) first by TiO2And CaCO3According to chemical formula CaTiO3In corresponding element molar ratio ingredient, by TiO2With
CaCO3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, roast 4h at 1100 DEG C, obtain after ball milling
CaTiO3Composition；
(2) by Sm2O3And Al2O3According to chemical formula SmAlO3In corresponding element molar ratio ingredient, by Sm2O3And Al2O3
Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, roast 4h at 1100 DEG C, obtain SmAlO after ball milling3
Composition；
(3) by TiO2、CaCO3、Sm2O3、Al2O3By chemical formula CaSmAlTiO6In corresponding element molar ratio ingredient,
By TiO2、CaCO3、Sm2O3、Al2O3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, In after ball milling
4h is roasted at 1100 DEG C, obtaining chemical formula is CaSmAlTiO6Composition；
(4) CaTiO that will be obtained3Composition, SmAlO3Composition and CaSmAlTiO6Composition is according to chemical formula
0.6CaTiO3-0.15SmAlO3-0.25CaSmAlTiO6In molar ratio ingredient, abundant ball milling after mixing dries after ball milling, makes
Then particle compression moulding after sieving is sintered at 1480 DEG C 4h and obtains the low loss and high strength microwave-medium by grain, sieving
Ceramics.
The microwave-medium ceramics that the embodiment 4 obtains be can be carried out into survey to its microwave dielectric property using microwave network analyzer
Examination, the performance test results are as shown in Table 1.
Embodiment 5
The preparation method of the low loss and high strength microwave-medium ceramics of the present embodiment 5, includes the following steps:
(1) first by TiO2And CaCO3According to chemical formula CaTiO3In corresponding element molar ratio ingredient, by TiO2With
CaCO3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, roast 4h at 1100 DEG C, obtain after ball milling
CaTiO3Composition；
(2) by Sm2O3And Al2O3According to chemical formula SmAlO3In corresponding element molar ratio ingredient, by Sm2O3And Al2O3
Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, roast 4h at 1100 DEG C, obtain SmAlO after ball milling3
Composition；
(3) by TiO2、CaCO3、Sm2O3、Al2O3By chemical formula CaSmAlTiO6In corresponding element molar ratio ingredient,
By TiO2、CaCO3、Sm2O3、Al2O3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, In after ball milling
4h is roasted at 1100 DEG C, obtaining chemical formula is CaSmAlTiO6Composition；
(4) CaTiO that will be obtained3Composition, SmAlO3Composition and CaSmAlTiO6Composition is according to chemical formula
0.6CaTiO3-0.2SmAlO3-0.2CaSmAlTiO6In molar ratio ingredient, abundant ball milling after mixing dries after ball milling, makes
Then particle compression moulding after sieving is sintered at 1450 DEG C 4h and obtains the low loss and high strength microwave-medium by grain, sieving
Ceramics.
The microwave-medium ceramics that the embodiment 5 obtains be can be carried out into survey to its microwave dielectric property using microwave network analyzer
Examination, the performance test results are as shown in Table 1.
Embodiment 6
The preparation method of the low loss and high strength microwave-medium ceramics of the present embodiment 6, includes the following steps:
(1) first by TiO2And CaCO3According to chemical formula CaTiO3In corresponding element molar ratio ingredient, by TiO2With
CaCO3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, roast 4h at 1100 DEG C, obtain after ball milling
CaTiO3Composition；
(2) by Sm2O3And Al2O3According to chemical formula SmAlO3In corresponding element molar ratio ingredient, by Sm2O3And Al2O3
Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, roast 4h at 1100 DEG C, obtain SmAlO after ball milling3
Composition；
(3) by TiO2、CaCO3、Sm2O3、Al2O3By chemical formula CaSmAlTiO6In corresponding element molar ratio ingredient,
By TiO2、CaCO3、Sm2O3、Al2O3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, In after ball milling
4h is roasted at 1100 DEG C, obtaining chemical formula is CaSmAlTiO6Composition；
(4) CaTiO that will be obtained3Composition, SmAlO3Composition and CaSmAlTiO6Composition is according to chemical formula
0.6CaTiO3-0.25SmAlO3-0.15CaSmAlTiO6In molar ratio ingredient, abundant ball milling after mixing dries after ball milling, makes
Then particle compression moulding after sieving is sintered at 1450 DEG C 4h and obtains the low loss and high strength microwave-medium by grain, sieving
Ceramics.
The microwave-medium ceramics that the embodiment 6 obtains be can be carried out into survey to its microwave dielectric property using microwave network analyzer
Examination, the performance test results are as shown in Table 1.
Embodiment 7
The preparation method of the low loss and high strength microwave-medium ceramics of the present embodiment 7, includes the following steps:
(1) first by TiO2And CaCO3According to chemical formula CaTiO3In corresponding element molar ratio ingredient, by TiO2With
CaCO3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, roast 4h at 1100 DEG C, obtain after ball milling
CaTiO3Composition；
(2) by Sm2O3And Al2O3According to chemical formula SmAlO3In corresponding element molar ratio ingredient, by Sm2O3And Al2O3
Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, roast 4h at 1100 DEG C, obtain SmAlO after ball milling3
Composition；
(3) by TiO2、CaCO3、Sm2O3、Al2O3By chemical formula CaSmAlTiO6In corresponding element molar ratio ingredient,
By TiO2、CaCO3、Sm2O3、Al2O3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, In after ball milling
4h is roasted at 1100 DEG C, obtaining chemical formula is CaSmAlTiO6Composition；
(4) CaTiO that will be obtained3Composition, SmAlO3Composition and CaSmAlTiO6Composition is according to chemical formula
0.6CaTiO3-0.3SmAlO3-0.1CaSmAlTiO6In molar ratio ingredient, abundant ball milling after mixing dries after ball milling, makes
Then particle compression moulding after sieving is sintered at 1400 DEG C 4h and obtains the low loss and high strength microwave-medium by grain, sieving
Ceramics.
The microwave-medium ceramics that the embodiment 7 obtains be can be carried out into survey to its microwave dielectric property using microwave network analyzer
Examination, the performance test results are as shown in Table 1.
Embodiment 8
The preparation method of the low loss and high strength microwave-medium ceramics of the present embodiment 8, includes the following steps:
(1) first by TiO2And CaCO3According to chemical formula CaTiO3In corresponding element molar ratio ingredient, by TiO2With
CaCO3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, roast 4h at 1100 DEG C, obtain after ball milling
CaTiO3Composition；
(2) by Sm2O3And Al2O3According to chemical formula SmAlO3In corresponding element molar ratio ingredient, by Sm2O3And Al2O3
Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, roast 4h at 1100 DEG C, obtain SmAlO after ball milling3
Composition；
(3) by TiO2、CaCO3、Sm2O3、Al2O3By chemical formula CaSmAlTiO6In corresponding element molar ratio ingredient,
By TiO2、CaCO3、Sm2O3、Al2O3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, In after ball milling
4h is roasted at 1100 DEG C, obtaining chemical formula is CaSmAlTiO6Composition；
(4) CaTiO that will be obtained3Composition, SmAlO3Composition and CaSmAlTiO6Composition is according to chemical formula
0.6CaTiO3-0.35SmAlO3-0.05CaSmAlTiO6In molar ratio ingredient, abundant ball milling after mixing dries after ball milling, makes
Then particle compression moulding after sieving is sintered at 1400 DEG C 4h and obtains the low loss and high strength microwave-medium by grain, sieving
Ceramics.
The microwave-medium ceramics that the embodiment 8 obtains be can be carried out into survey to its microwave dielectric property using microwave network analyzer
Examination, the performance test results are as shown in Table 1.
Comparative example
The preparation method of the microwave-medium ceramics of comparative example, includes the following steps:
(1) first by TiO2And CaCO3According to chemical formula CaTiO3In corresponding element molar ratio ingredient, by TiO2With
CaCO3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, roast 4h at 1100 DEG C, obtain after ball milling
CaTiO3Composition；
(2) by Sm2O3And Al2O3According to chemical formula SmAlO3In corresponding element molar ratio ingredient, by Sm2O3And Al2O3
Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible, roast 4h at 1100 DEG C, obtain SmAlO after ball milling3
Composition；
(3 CaTiO that will be obtained3Composition, SmAlO3Composition is according to chemical formula 0.6CaTiO3-0.4SmAlO3In rub
You are than ingredient, abundant ball milling after mixing, and drying, granulation, sieving, then the particle compression moulding after sieving exists after ball milling
It is sintered 4h at 1400 DEG C and obtains the low loss and high strength microwave-medium ceramics.
The microwave-medium ceramics that comparative example obtains be can be carried out into test to its microwave dielectric property using microwave network analyzer,
The performance test results are as shown in Table 1.
The performance test results of one embodiment 1 to 8 of table and the resulting microwave-medium ceramics of comparative example
As shown in Table 1, the relative dielectric constant of the resulting microwave-medium ceramics of 1-8 of the embodiment of the present invention is 33-38, microwave
Performance Qf=44000-61000GHz, temperature coefficient of resonance frequency are adjustable to nearly zero, bending strength >=240Mpa, compared to comparison
The microwave-medium ceramics of example, microwave-medium ceramics dielectric constant of the invention is moderate, and quality factor are high, temperature coefficient of resonance frequency
Adjustable, processing intensity is high.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (8)
1. a kind of low loss and high strength microwave-medium ceramics, it is characterised in that: it is xCaTiO that it, which forms expression formula,3-ySmAlO3-
(1-x-y)CaSmAlTiO6, wherein x, y, (1-x-y) represent molar ratio, x=0.6,0≤y < 0.4.
2. low loss and high strength microwave-medium ceramics according to claim 1, it is characterised in that: the group of microwave-medium ceramics
At in expression formula, 0≤y < 0.35.
3. a kind of preparation method of low loss and high strength microwave-medium ceramics, which comprises the following steps:
(1) first by TiO2And CaCO3According to chemical formula CaTiO3In corresponding element molar ratio ingredient, by TiO2And CaCO3It is mixed
Abundant ball milling after conjunction, drying, sieving, are then placed in corundum crucible and are roasted, obtain CaTiO after ball milling3Composition；
(2) by Sm2O3And Al2O3According to chemical formula SmAlO3In corresponding element molar ratio ingredient, by Sm2O3And Al2O3Mixing
Abundant ball milling afterwards, drying, sieving, are then placed in corundum crucible and are roasted, obtain SmAlO after ball milling3Composition；
(3) by TiO2、CaCO3、Sm2O3、Al2O3By chemical formula CaSmAlTiO6In corresponding element molar ratio ingredient, will
TiO2、CaCO3、Sm2O3、Al2O3Abundant ball milling after mixing, drying, sieving, are then placed in corundum crucible and are roasted after ball milling
It burns, obtaining chemical formula is CaSmAlTiO6Composition；
(4) CaTiO that will be obtained3Composition, SmAlO3Composition and CaSmAlTiO6Composition is according to chemical formula xCaTiO3-
ySmAlO3-(1-x-y)CaSmAlTiO6In molar ratio ingredient, abundant ball milling after mixing, drying after ball milling is granulated, sieving, will
Particle compression moulding after sieving, then sintering obtains the low loss and high strength microwave-medium ceramics, wherein the chemical formula
xCaTiO3-ySmAlO3-(1-x-y)CaSmAlTiO6In, x, y, (1-x-y) represents molar ratio, x=0.6,0≤y < 0.4.
4. a kind of preparation method of low loss and high strength microwave-medium ceramics according to claim 3, which is characterized in that step
Suddenly the roasting process in (1) is 3~5h of roasting heat preservation at 1000~1100 DEG C.
5. a kind of preparation method of low loss and high strength microwave-medium ceramics according to claim 3, which is characterized in that step
Suddenly the roasting process in (2) is 3~5h of roasting heat preservation at 1000~1100 DEG C.
6. a kind of preparation method of low loss and high strength microwave-medium ceramics according to claim 3, which is characterized in that step
Suddenly the roasting process in (3) is 3~5h of roasting heat preservation at 1000~1100 DEG C.
7. a kind of preparation method of low loss and high strength microwave-medium ceramics according to claim 3, which is characterized in that step
Suddenly in (3), it is highly the cylindrical body of 6mm that it is 10mm that the particle after sieving, which is pressed into diameter,.
8. a kind of preparation method of low loss and high strength microwave-medium ceramics according to claim 3, which is characterized in that step
Suddenly the sintering process in (3) is sintered 4 hours at 1400~1500 DEG C.
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