CN109851350A - A kind of low Jie high Q lithium magnesium phosphorus system dielectric material and preparation method thereof - Google Patents
A kind of low Jie high Q lithium magnesium phosphorus system dielectric material and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to technical field of ceramic material, disclose a kind of low Jie high Q lithium magnesium phosphorus system dielectric material and preparation method thereof, and chemical formula is LiMg (P1‑xNbx)O4(0.02≤x≤0.08)；It is by Li2CO3、MgO、NH4H2PO4、Nb2O5Ingredient in proportion；It dries, be sieved after ball milling, calcining obtains preburning powder at a certain temperature；It dries, be sieved after preburning powder secondary ball milling, be granulated, green body is pressed into after sieving；Green body is sintered at a certain temperature, and room temperature is down to after heat preservation and is obtained.The present invention uses conventional solid-state method, uses Nb5+To LiMgPO4P in dielectric material5+Ion is replaced, and improves Q × f value significantly.In addition, lithium magnesium phosphorus system dielectric material of the invention is nontoxic, and it is pollution-free, meet environmental requirement；Preparation process is simple, at low cost, is suitable for large-scale production, to manufacture resonator, the microwave devices such as filter.
Description
Technical field
The invention belongs to technical field of ceramic material, it particularly relates to a kind of ceramic composition characterized by ingredient
And preparation method thereof, especially a kind of novel lithium magnesium phosphorus system dielectric material and preparation method thereof.
Background technique
With the rapid development of wireless communication technique, microwave-medium ceramics are because of its specific function in circuit and excellent spy
Property causes more and more concerns.Microwave dielectric ceramic materials have low-k, low-loss, high resonant frequency stability
The advantages that, the microwave devices such as resonator, filter, diectric antenna, dielectric guided wave circuit are mainly used as in microwave circuit.It grinds
Study carefully Novel microwave dielectric ceramic and provides important materials for support for microwave circuit.
In recent years, the demand of electronic component high frequency development is growing, low Jie's low temperature microwave medium ceramics become
The emphasis of research.LiMgPO4Dielectric material causes the extensive concern of people, sintering temperature as a kind of novel low Jie's low temperature
It is 950 DEG C, meets LTCC technology, but dielectric material Q × f value is lower, Q × f value is 79,643GHz, is answered in microwave system
Higher energy loss is generated with middle, so that there is delay between the electric field and electric displacement vector of microwave system.
Therefore, in order to meet the needs of practical application, a kind of lithium magnesium phosphorus system dielectric material of novel high Q × f value is studied
And preparation method thereof be particularly important.
Summary of the invention
The present invention is to solve existing LiMgPO4The lower technical problem of dielectric material Q × f value proposes a kind of low Jie
High Q lithium magnesium phosphorus system dielectric material and preparation method thereof, with Li2CO3、MgO、NH4H2PO4、Nb2O5For primary raw material, using tradition
Solid phase method, with Nb5+To P5+It is replaced, improves Q × f value of lithium magnesium phosphorus series microwave dielectric ceramic.
In order to solve the above technical problems, the present invention is achieved by technical solution below:
A kind of low Jie high Q lithium magnesium phosphorus system dielectric material, chemical formula are LiMg (P1-xNbx)O4, 0.02≤x≤0.08.
Further, by Li2CO3、MgO、NH4H2PO4、Nb2O5Raw material is made.
A kind of preparation method of the low high Q lithium magnesium phosphorus system dielectric material that is situated between, this method follow the steps below:
(1) by Li2CO3、MgO、NH4H2PO4、Nb2O5Raw material, according to chemical formula LiMg (P1-xNbx)O4, 0.02≤x≤
0.08 carries out ingredient；By gained ingredient, deionized water, abrading-ball according to the mass ratio of 3:18:15 the primary ball milling 1-3 on ball mill
Hour；
(2) mix obtained by step (1) dried, cross 40 meshes, obtain evengranular mixed-powder；
(3) mixed-powder obtained by step (2) is warming up to 500-550 DEG C of heat preservation 1-3 hours, later it is further heated up to
650-750 DEG C temperature lower calcination 4-6 hours, obtain preburning powder；
(4) by preburning powder, deionized water obtained by step (3), abrading-ball according to the mass ratio of 3:18:15 two on ball mill
Secondary ball milling 6-8 hours；
(5) after the drying of powder obtained by step (4), 40 meshes being crossed, the paraffin for accounting for its mass ratio 6-8wt% is added as viscous
Mixture is granulated, and is crossed 80 meshes and is pressed into green body later；
(6) green body obtained by step (5) is sintered at a temperature of 1000-1100 DEG C, keeps the temperature 2-4 hours, obtain the low high Q lithium that is situated between
Magnesium phosphorus system dielectric material.
Preferably, the Ball-milling Time in step (1) is 2 hours.
Preferably, mixed-powder obtained by step (2) is warming up to 550 DEG C of heat preservations 1-3 hours in step (3).
Preferably, the calcination temperature in step (3) is 700 DEG C, and calcination time is 4 hours.
Preferably, the Ball-milling Time in step (4) is 8 hours.
Preferably, the sintering temperature in step (6) is 1050 DEG C, and soaking time is 2 hours.
The beneficial effects of the present invention are:
The present invention uses different amounts of five valence metal ions Nb5+To LiMgPO4P in ceramics5+Ion is replaced, and is obtained
A kind of novel lithium magnesium phosphorus series microwave dielectric material LiMg (P suitable for 9-12GHz microwave frequency1-xNbx)O4(0.02≤x≤
0.08), with excellent microwave dielectric property, Q × f value is significantly improved.Especially work as Nb5+The substitution amount of ion is
When 0.04mol, prepared LiMg (P0.96Nb0.04)O4Microwave-medium ceramics are sintered 2 hours at 1050 DEG C and obtain maximum Q × f
Value~86,848GHz.In addition, microwave dielectric material of the invention is nontoxic, and it is pollution-free, meet environmental requirement；And preparation process letter
It is single, it is at low cost, it is suitable for large-scale production, to manufacture resonator, the microwave devices such as filter.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail:
Following embodiment can make those skilled in the art that the present invention be more completely understood, but not limit this in any way
Invention.
The present invention is greater than 99% chemical raw material Li using purity2CO3、MgO、NH4H2PO4, Nb2O5Prepare novel low Jie
High Q lithium magnesium phosphorus system dielectric material.
The present invention is by Li2CO3、MgO、NH4H2PO4, Nb2O5Raw material presses chemical formula LiMg (P1-xNbx)O4(0.02≤x≤
0.08) ingredient is carried out, by raw material: deionized water: abrading-ball=3:18:16 mass ratio is added in polyester tank, the ball on ball mill
Mill 1-3 hours；Raw material after ball milling is placed in drying box drying, 40 meshes are crossed after drying, the powder after sieving is heated up first
To 500-550 DEG C heat preservation 1-3 hours, later it is further heated up to 650 DEG C -750 DEG C of calcinings 4-6 hours；Again by calcined powder
Material, deionized water and zirconium ball are put into polyester tank according to the mass ratio of 3:18:16, and ball milling is dried after 6-8 hours, cross 40 meshes；
The paraffin wax binder that added weight percentage is 6~8% in ceramic powder after the drying again is granulated, after crossing 80 meshes,
It is 10mm that powder, which is pressed into diameter, under the pressure of 4MPa with powder compressing machine, with a thickness of the green compact of 5mm；By green compact in 1000-
1100 DEG C of sintering, keep the temperature 2-4 hours, low Jie high Q lithium magnesium phosphorus system dielectric material are made；Finally by Network Analyzer and correlative measurement
Try the microwave dielectric property of fixture test article.
Embodiment 1
1. according to lithium magnesium phosphorus system dielectric material component LiMg (P0.98Nb0.02)O4, claim Li2CO3-5.7538g、MgO-
6.2769g、NH4H2PO4- 17.5554g, Nb2O5- 0.4140g ingredient, total 30g；Mixed powder is added in polyester tank, is added
After 180ml deionized water and 160g zirconium ball, ball milling 3 hours on planetary ball mill, drum's speed of rotation is 250 revs/min；
2. the raw material after ball milling is placed in drying box and dries and cross 40 meshes, evengranular powder is obtained；
3. powder is warming up to 550 DEG C first keeps the temperature 1 hour, it is further heated up to 700 DEG C later to be calcined 4 hours；
4. calcined powder is put into polyester tank, secondary ball milling 6 hours, dried after discharging, crosses 40 meshes；Then plus
Enter the paraffin that weight percent is 7% to be granulated as adhesive, and crosses 80 meshes；Again with powder compressing machine with the pressure of 4MPa
Forcing into diameter is 10mm, with a thickness of the green body of 5mm；
5. green body is sintered in 1025 DEG C, 2 hours are kept the temperature, low Jie high Q lithium magnesium phosphorus system dielectric material is made；
Finally, testing resulting product microwave property by Network Analyzer and dependence test fixture.
Embodiment 2
1. according to lithium magnesium phosphorus system dielectric material component LiMg (P0.98Nb0.02)O4, claim Li2CO3-5.7538g、MgO-
6.2769g、NH4H2PO4- 17.5554g, Nb2O5- 0.4140g ingredient, total 30g；Mixed powder is added in polyester tank, is added
After 180ml deionized water and 160g zirconium ball, ball milling 1 hour on planetary ball mill, drum's speed of rotation is 250 revs/min；
2. the raw material after ball milling is placed in drying box and dries and cross 40 meshes, evengranular powder is obtained；
3. powder is warming up to 500 DEG C first keeps the temperature 2 hours, it is further heated up to 700 DEG C later to be calcined 5 hours；
4. calcined powder is put into polyester tank, secondary ball milling 7 hours, dried after discharging, crosses 40 meshes；Then plus
Enter the paraffin that weight percent is 8% to be granulated as adhesive, and crosses 80 meshes；Again with powder compressing machine with the pressure of 4MPa
Forcing into diameter is 10mm, with a thickness of the green body of 5mm；
5. green body is sintered in 1100 DEG C, 4 hours are kept the temperature, low Jie high Q lithium magnesium phosphorus system dielectric material is made；
Finally, testing resulting product microwave property by Network Analyzer and dependence test fixture.
Embodiment 3
1. according to lithium magnesium phosphorus system dielectric material component LiMg (P0.96Nb0.04)O4, claim Li2CO3-5.7431g、MgO-
6.2652g、NH4H2PO4- 17.1653g, Nb2O5- 0.8264g ingredient, total 30g；Mixed powder is added in polyester tank, is added
After 180ml deionized water and 160g zirconium ball, ball milling 2 hours on planetary ball mill, drum's speed of rotation is 250 revs/min；
2. the raw material after ball milling is placed in drying box and dries and cross 40 meshes, evengranular powder is obtained；
3. powder is warming up to 550 DEG C first keeps the temperature 3 hours, it is further heated up to 650 DEG C later to be calcined 6 hours；
4. calcined powder is put into polyester tank, secondary ball milling 8 hours, dried after discharging, crosses 40 meshes；Then plus
Enter the paraffin that weight percent is 8% to be granulated as adhesive, and crosses 80 meshes；Again with powder compressing machine with the pressure of 4MPa
Forcing into diameter is 10mm, with a thickness of the green body of 5mm；
5. green body is sintered in 1050 DEG C, 3 hours are kept the temperature, low Jie high Q lithium magnesium phosphorus system dielectric material is made；
Finally, testing resulting product microwave property by Network Analyzer and dependence test fixture.
Embodiment 4
1. according to lithium magnesium phosphorus system dielectric material component LiMg (P0.96Nb0.04)O4, claim Li2CO3-5.7431g、MgO-
6.2652g、NH4H2PO4- 17.1653g, Nb2O5- 0.8264g ingredient, total 30g；Mixed powder is added in polyester tank, is added
After 180ml deionized water and 160g zirconium ball, ball milling 2 hours on planetary ball mill, drum's speed of rotation is 250 revs/min；
2. the raw material after ball milling is placed in drying box and dries and cross 40 meshes, evengranular powder is obtained；
3. powder is warming up to 550 DEG C first keeps the temperature 2 hours, it is further heated up to 750 DEG C later to be calcined 4 hours；
4. calcined powder is put into polyester tank, secondary ball milling 8 hours, dried after discharging, crosses 40 meshes；Then plus
Enter the paraffin that weight percent is 8% to be granulated as adhesive, and crosses 80 meshes；Again with powder compressing machine with the pressure of 4MPa
Forcing into diameter is 10mm, with a thickness of the green body of 5mm；
5. green body is sintered in 1000 DEG C, 2 hours are kept the temperature, low Jie high Q lithium magnesium phosphorus system dielectric material is made；
Finally, testing resulting product microwave property by Network Analyzer and dependence test fixture.
Embodiment 5
1. according to lithium magnesium phosphorus system dielectric material component LiMg (P0.96Nb0.04)O4, claim Li2CO3-5.7431g、MgO-
6.2652g、NH4H2PO4- 17.1653g, Nb2O5- 0.8264g ingredient, total 30g；Mixed powder is added in polyester tank, is added
After 180ml deionized water and 160g zirconium ball, ball milling 2 hours on planetary ball mill, drum's speed of rotation is 250 revs/min；
2. the raw material after ball milling is placed in drying box and dries and cross 40 meshes, evengranular powder is obtained；
3. powder is warming up to 550 DEG C first keeps the temperature 2 hours, it is further heated up to 700 DEG C later to be calcined 4 hours；
4. calcined powder is put into polyester tank, secondary ball milling 8 hours, dried after discharging, crosses 40 meshes；Then plus
Enter the paraffin that weight percent is 8% to be granulated as adhesive, and crosses 80 meshes；Again with powder compressing machine with the pressure of 4MPa
Forcing into diameter is 10mm, with a thickness of the green body of 5mm；
5. green body is sintered in 1025 DEG C, 2 hours are kept the temperature, low Jie high Q lithium magnesium phosphorus system dielectric material is made；
Finally, testing resulting product microwave property by Network Analyzer and dependence test fixture.
Embodiment 6
1. according to lithium magnesium phosphorus system dielectric material component LiMg (P0.96Nb0.04)O4, claim Li2CO3-5.7431g、MgO-
6.2652g、NH4H2PO4- 17.1653g, Nb2O5- 0.8264g ingredient, total 30g；Mixed powder is added in polyester tank, is added
After 180ml deionized water and 160g zirconium ball, ball milling 2 hours on planetary ball mill, drum's speed of rotation is 250 revs/min；
2. the raw material after ball milling is placed in drying box and dries and cross 40 meshes, evengranular powder is obtained；
3. powder is warming up to 550 DEG C first keeps the temperature 2 hours, it is further heated up to 700 DEG C later to be calcined 4 hours；
4. calcined powder is put into polyester tank, secondary ball milling 8 hours, dried after discharging, crosses 40 meshes；Then plus
Enter the paraffin that weight percent is 8% to be granulated as adhesive, and crosses 80 meshes；Again with powder compressing machine with the pressure of 4MPa
Forcing into diameter is 10mm, with a thickness of the green body of 5mm；
5. green body is sintered in 1050 DEG C, 2 hours are kept the temperature, low Jie high Q lithium magnesium phosphorus system dielectric material is made；
Finally, testing resulting product microwave property by Network Analyzer and dependence test fixture.
Embodiment 7
1. according to lithium magnesium phosphorus system dielectric material component LiMg (P0.96Nb0.04)O4, claim Li2CO3-5.7431g、MgO-
6.2652g、NH4H2PO4- 17.1653g, Nb2O5- 0.8264g ingredient, total 30g；Mixed powder is added in polyester tank, is added
After 180ml deionized water and 160g zirconium ball, ball milling 2 hours on planetary ball mill, drum's speed of rotation is 250 revs/min；
2. the raw material after ball milling is placed in drying box and dries and cross 40 meshes, evengranular powder is obtained；
3. powder is warming up to 550 DEG C first keeps the temperature 2 hours, it is further heated up to 700 DEG C later to be calcined 4 hours；
4. calcined powder is put into polyester tank, secondary ball milling 8 hours, dried after discharging, crosses 40 meshes；Then plus
Enter the paraffin that weight percent is 8% to be granulated as adhesive, and crosses 80 meshes；Again with powder compressing machine with the pressure of 4MPa
Forcing into diameter is 10mm, with a thickness of the green body of 5mm；
5. green body is sintered in 1075 DEG C, 2 hours are kept the temperature, low Jie high Q lithium magnesium phosphorus system dielectric material is made；
Finally, testing resulting product microwave property by Network Analyzer and dependence test fixture.
Embodiment 8
1. according to lithium magnesium phosphorus system dielectric material component LiMg (P0.94Nb0.06)O4, claim Li2CO3-5.7325g、MgO-
6.2536g、NH4H2PO4- 16.7766g, Nb2O5- 1.2373g ingredient, total 30g；Mixed powder is added in polyester tank, is added
After 180ml deionized water and 160g zirconium ball, ball milling 2 hours on planetary ball mill, drum's speed of rotation is 250 revs/min；
2. the raw material after ball milling is placed in drying box and dries and cross 40 meshes, evengranular powder is obtained；
3. powder is warming up to 550 DEG C first keeps the temperature 2 hours, it is further heated up to 700 DEG C later to be calcined 4 hours；
4. calcined powder is put into polyester tank, secondary ball milling 8 hours, dried after discharging, crosses 40 meshes；Then plus
Enter the paraffin that weight percent is 8% to be granulated as adhesive, and crosses 80 meshes；Again with powder compressing machine with the pressure of 4MPa
Forcing into diameter is 10mm, with a thickness of the green body of 5mm；
5. green body is sintered in 1025 DEG C, 2 hours are kept the temperature, low Jie high Q lithium magnesium phosphorus system dielectric material is made；
Finally, testing resulting product microwave property by Network Analyzer and dependence test fixture.
Embodiment 9
1. according to lithium magnesium phosphorus system dielectric material component LiMg (P0.94Nb0.06)O4, claim Li2CO3-5.7325g、MgO-
6.2536g、NH4H2PO4- 16.7766g, Nb2O5- 1.2373g ingredient, total 30g；Mixed powder is added in polyester tank, is added
After 180ml deionized water and 160g zirconium ball, ball milling 2 hours on planetary ball mill, drum's speed of rotation is 250 revs/min；
2. the raw material after ball milling is placed in drying box and dries and cross 40 meshes, evengranular powder is obtained；
3. powder is warming up to 550 DEG C first keeps the temperature 2 hours, it is further heated up to 700 DEG C later to be calcined 4 hours；
4. calcined powder is put into polyester tank, secondary ball milling 8 hours, dried after discharging, crosses 40 meshes；Then plus
Enter the paraffin that weight percent is 8% to be granulated as adhesive, and crosses 80 meshes；Again with powder compressing machine with the pressure of 4MPa
Forcing into diameter is 10mm, with a thickness of the green body of 5mm；
5. green body is sintered in 1075 DEG C, 2 hours are kept the temperature, low Jie high Q lithium magnesium phosphorus system dielectric material is made；
Finally, testing resulting product microwave property by Network Analyzer and dependence test fixture.
Embodiment 10
1. according to lithium magnesium phosphorus system dielectric material component LiMg (P0.94Nb0.06)O4, claim Li2CO3-5.7325g、MgO-
6.2536g、NH4H2PO4- 16.7766g, Nb2O5- 1.2373g ingredient, total 30g；Mixed powder is added in polyester tank, is added
After 180ml deionized water and 160g zirconium ball, ball milling 2 hours on planetary ball mill, drum's speed of rotation is 250 revs/min；
2. the raw material after ball milling is placed in drying box and dries and cross 40 meshes, evengranular powder is obtained；
3. powder is warming up to 550 DEG C first keeps the temperature 2 hours, it is further heated up to 750 DEG C later to be calcined 4 hours；
4. calcined powder is put into polyester tank, secondary ball milling 8 hours, dried after discharging, crosses 40 meshes；Then plus
Enter the paraffin that weight percent is 6% to be granulated as adhesive, and crosses 80 meshes；Again with powder compressing machine with the pressure of 4MPa
Forcing into diameter is 10mm, with a thickness of the green body of 5mm；
5. green body is sintered in 1100 DEG C, 2 hours are kept the temperature, low Jie high Q lithium magnesium phosphorus system dielectric material is made；
Finally, testing resulting product microwave property by Network Analyzer and dependence test fixture.
Embodiment 11:
1. according to lithium magnesium phosphorus system dielectric material component LiMg (P0.92Nb0.08)O4, claim Li2CO3-5.7219g、MgO-
6.2421g、NH4H2PO4- 16.3893g, Nb2O5- 1.6467g ingredient, total 30g；Mixed powder is added in polyester tank, is added
After 180ml deionized water and 160g zirconium ball, ball milling 2 hours on planetary ball mill, drum's speed of rotation is 250 revs/min；
2. the raw material after ball milling is placed in drying box and dries and cross 40 meshes, evengranular powder is obtained；
3. powder is warming up to 550 DEG C first keeps the temperature 2 hours, it is further heated up to 700 DEG C later to be calcined 4 hours；
4. calcined powder is put into polyester tank, secondary ball milling 8 hours, dried after discharging, crosses 40 meshes；Then plus
Enter the paraffin that weight percent is 7% to be granulated as adhesive, and crosses 80 meshes；Again with powder compressing machine with the pressure of 4MPa
Forcing into diameter is 10mm, with a thickness of the green body of 5mm；
5. green body is sintered in 1000 DEG C, 2 hours are kept the temperature, low Jie high Q lithium magnesium phosphorus system dielectric material is made；
Finally, testing resulting product microwave property by Network Analyzer and dependence test fixture.
Embodiment 12
1. according to lithium magnesium phosphorus system dielectric material component LiMg (P0.92Nb0.08)O4, claim Li2CO3-5.7219g、MgO-
6.2421g、NH4H2PO4- 16.3893g, Nb2O5- 1.6467g ingredient, total 30g；Mixed powder is added in polyester tank, is added
After 180ml deionized water and 160g zirconium ball, ball milling 2 hours on planetary ball mill, drum's speed of rotation is 250 revs/min；
2. the raw material after ball milling is placed in drying box and dries and cross 40 meshes, evengranular powder is obtained；
3. powder is warming up to 550 DEG C first keeps the temperature 2 hours, it is further heated up to 700 DEG C later to be calcined 4 hours；
4. calcined powder is put into polyester tank, secondary ball milling 8 hours, dried after discharging, crosses 40 meshes；Then plus
Enter the paraffin that weight percent is 7% to be granulated as adhesive, and crosses 80 meshes；Again with powder compressing machine with the pressure of 4MPa
Forcing into diameter is 10mm, with a thickness of the green body of 5mm；
5. green body is sintered in 1050 DEG C, 2 hours are kept the temperature, low Jie high Q lithium magnesium phosphorus system dielectric material is made；
Finally, testing resulting product microwave property by Network Analyzer and dependence test fixture.
Embodiment 13
1. according to lithium magnesium phosphorus system dielectric material component LiMg (P0.92Nb0.08)O4, claim Li2CO3-5.7219g、MgO-
6.2421g、NH4H2PO4- 16.3893g, Nb2O5- 1.6467g ingredient, total 30g；Mixed powder is added in polyester tank, is added
After 180ml deionized water and 160g zirconium ball, ball milling 2 hours on planetary ball mill, drum's speed of rotation is 250 revs/min；
2. the raw material after ball milling is placed in drying box and dries and cross 40 meshes, evengranular powder is obtained；
3. powder is warming up to 525 DEG C first keeps the temperature 2 hours, it is further heated up to 700 DEG C later to be calcined 4 hours；
4. calcined powder is put into polyester tank, secondary ball milling 8 hours, dried after discharging, crosses 40 meshes；Then plus
Enter the paraffin that weight percent is 8% to be granulated as adhesive, and crosses 80 meshes；Again with powder compressing machine with the pressure of 4MPa
Forcing into diameter is 10mm, with a thickness of the green body of 5mm；
5. green body is sintered in 1100 DEG C, 2 hours are kept the temperature, low Jie high Q lithium magnesium phosphorus system dielectric material is made；
Finally, testing resulting product microwave property by Network Analyzer and dependence test fixture.
Table 1 is LiMg (P of the present invention1-xNbx)O4Each embodiment related process parameters of (0.02≤x≤0.08) dielectric material and
Microwave dielectric property.
1 microwave dielectric property of table
From above-described embodiment as can be seen that novel low Jie high Q lithium magnesium phosphorus system dielectric material LiMg (P that the present invention studies1- xNbx)O4(0.02≤x≤0.08) all has good microwave dielectric property, dielectric constant and temperature coefficient of resonance frequency base
Originally it remains unchanged, Q × f value, which has, to be obviously improved.It especially as x=0.04, is sintered at 1050 DEG C, heat preservation 2 hours (real
Apply example 6), gained dielectric material performance is the most excellent: εr=7.33, Q × f=86848GHz, τf=-71.58ppm/ DEG C, greatly
Ground improves the quality factor of lithium magnesium phosphorus system dielectric material.
Although the preferred embodiment of the present invention is described above, the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, is not restrictive, those skilled in the art
Under the inspiration of the present invention, it when not departing from invention objective and scope of the claimed protection, can also make very much
The specific transformation of form, within these are all belonged to the scope of protection of the present invention.
Claims (8)
1. a kind of low Jie high Q lithium magnesium phosphorus system dielectric material, which is characterized in that its chemical formula is LiMg (P1-xNbx)O4, 0.02≤x
≤0.08。
2. the low Jie high Q lithium magnesium phosphorus system dielectric material of one kind according to claim 1, which is characterized in that by Li2CO3、MgO、
NH4H2PO4、Nb2O5Raw material is made.
3. a kind of preparation method of the high Q lithium magnesium phosphorus system dielectric material that is situated between low as described in any one of claim 1-2, feature exist
In this method follows the steps below:
(1) by Li2CO3、MgO、NH4H2PO4、Nb2O5Raw material, according to chemical formula LiMg (P1-xNbx)O4, 0.02≤x≤0.08 into
Row ingredient；By gained ingredient, deionized water, abrading-ball according to the mass ratio of 3:18:15 primary ball milling 1-3 hours on ball mill；
(2) mix obtained by step (1) dried, cross 40 meshes, obtain evengranular mixed-powder；
(3) mixed-powder obtained by step (2) is warming up to 500-550 DEG C of heat preservation 1-3 hours, it is further heated up to 650- later
750 DEG C temperature lower calcination 4-6 hours, obtain preburning powder；
(4) by preburning powder, deionized water obtained by step (3), abrading-ball according to the mass ratio of 3:18:15 the secondary ball on ball mill
Mill 6-8 hours；
(5) after the drying of powder obtained by step (4), 40 meshes being crossed, the paraffin for accounting for its mass ratio 6-8wt% is added as adhesive
It is granulated, crosses 80 meshes and be pressed into green body later；
(6) green body obtained by step (5) is sintered at a temperature of 1000-1100 DEG C, keeps the temperature 2-4 hours, obtain the low high Q lithium magnesium phosphorus that is situated between
It is dielectric material.
4. the preparation method of the low high Q lithium magnesium phosphorus system dielectric material that is situated between of one kind according to claim 3, which is characterized in that step
Suddenly the Ball-milling Time in (1) is 2 hours.
5. the preparation method of the low high Q lithium magnesium phosphorus system dielectric material that is situated between of one kind according to claim 3, which is characterized in that step
Suddenly mixed-powder obtained by step (2) is warming up to 550 DEG C in (3) and keeps the temperature 2 hours.
6. the preparation method of the low high Q lithium magnesium phosphorus system dielectric material that is situated between of one kind according to claim 3, which is characterized in that step
Suddenly the calcination temperature in (3) is 700 DEG C, and calcination time is 4 hours.
7. the preparation method of the low high Q lithium magnesium phosphorus system dielectric material that is situated between of one kind according to claim 3, which is characterized in that step
Suddenly the Ball-milling Time in (4) is 8 hours.
8. the preparation method of the low high Q lithium magnesium phosphorus system dielectric material that is situated between of one kind according to claim 3, which is characterized in that step
Suddenly the sintering temperature in (6) is 1050 DEG C, and soaking time is 2 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910042909.6A CN109851350A (en) | 2019-01-17 | 2019-01-17 | A kind of low Jie high Q lithium magnesium phosphorus system dielectric material and preparation method thereof |
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| CN111995390A (en) * | 2020-09-08 | 2020-11-27 | 中物院成都科学技术发展中心 | Novel ultralow-temperature sintered microwave dielectric ceramic material and preparation method thereof |
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