CN104649673A - Neodymium niobate ceramic having improved microwave dielectric characteristic by substituting neodymium ions with lanthanum ions - Google Patents

Neodymium niobate ceramic having improved microwave dielectric characteristic by substituting neodymium ions with lanthanum ions Download PDF

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CN104649673A
CN104649673A CN201510096016.1A CN201510096016A CN104649673A CN 104649673 A CN104649673 A CN 104649673A CN 201510096016 A CN201510096016 A CN 201510096016A CN 104649673 A CN104649673 A CN 104649673A
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neodymium
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niobic acid
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张平
赵永贵
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Tianjin University
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Tianjin University
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Abstract

The invention discloses neodymium niobate ceramic having improved microwave dielectric characteristic by substituting neodymium ions with lanthanum ions. The formula of the neodymium niobate ceramic is (Nd1-xLax)NbO4, in the formula, x is less than or equal to 0.1. The preparation method of the neodymium niobate ceramic comprises the following steps: firstly, preparing Nd2O3, La2O3 and Nb2O5 according to the chemical formula, ball-milling, drying, screening, and calcining for 4 hours at 900-1000 DEG C; pelleting, pressing to form a blank, and sintering at 1225-1300 DEG C, thereby obtaining the neodymium niobate ceramic. As lanthanum ions are adopted to substitute Nd on the A site in NdNbO4, the microwave dielectric property can be improved, the dielectric constant of the neodymium niobate ceramic is 21.52, the quality factor of the neodymium niobate ceramic is 45600GHz, and the resonance frequency temperature coefficient of the neodymium niobate ceramic is up to 0ppm/DEG C. The neodymium niobate ceramic is simple in preparation process, environment-friendly in process and is a microwave medium material with a good application prospect.

Description

A kind of lanthanum ion replaces neodymium ion to improve the niobic acid neodymium pottery of microwave dielectric property
Technical field
The invention belongs to a kind of take composition as the ceramic composition of feature, and particularly a kind of lanthanum ion replaces neodymium ion with niobic acid neodymium pottery improving microwave dielectric property and preparation method thereof.
Background technology
Along with the development of microwave communication techniques, microwave dielectric material causes people and more and more pays close attention to, and the material that can be applied in microwave device mainly should meet following three parameters, be respectively high specific inductivity, high quality factor and nearly zero temperature coefficient of resonance frequency, and these three parameters and material to make the size of device, operating frequency and thermostability corresponding.In practical application, mainly working in radar and the global positioning system (GPS) of microwave frequency band.
Rare earth niobates (LnNbO 4) be the microwave dielectric material that a series of structure, phase-change characteristic and physical properties are similar, Ln wherein comprises whole rare earth elements of La to Lu.Niobate material is important electronic material, there is excellent photoelectric properties and non-linear optical property, good optical effect and the peculiar property such as electric property and metacrystal phase boundary, be a kind of multifunctional material with using value that gets a good eye, it is at present mainly for the manufacture of electrical condenser and opto-electronic device.Niobic acid neodymium (NdNbO is when Ln is substituted by Nd 4) pottery.Based on the research of other researchists, niobic acid neodymium pottery belongs to perovskite-like scheelite-type structure, has suitable DIELECTRIC CONSTANT ε r(19.6), the temperature coefficient of resonance frequency τ of nearly zero f(-24ppm/ DEG C), quality factor q × f (33000GHz).And these three parameters are not well positioned to meet the application requiring of microwave device.
Therefore, microwave dielectric property governs the application of niobic acid neodymium pottery.But it is at present less to the report of the research of its preparation method and modification.The present invention adopts conventional solid-state method, replaces neodymium ion with lanthanum ion, on the basis that its specific inductivity remains unchanged substantially, improves the quality factor of niobic acid neodymium pottery and improves its temperature coefficient of resonance frequency.
Summary of the invention
Object of the present invention is the microwave dielectric property for improving niobic acid neodymium pottery further, provides a kind of with Nd 2o 3, Nb 2o 5for main raw material, and replace neodymium ion with appropriate lanthanum ion, prepare the niobic acid neodymium microwave-medium ceramics of the higher and nearly zero-temperature coefficient of quality factor q × f.
The present invention is achieved by following technical solution.
A kind of lanthanum ion replaces neodymium ion to improve the niobic acid neodymium pottery of microwave dielectric property, it consists of (Nd 1-xla x) NbO 4, wherein, mole number x is 0<x≤0.1;
The preparation method of above-mentioned niobic acid neodymium pottery, has following steps:
(1) by Nd 2o 3, La 2o 3, Nb 2o 5raw material, by chemical formula (Nd 1-xla x) NbO 4, wherein prepare burden in 0<x≤0.1; In raw material: deionized water: the ratio of abrading-ball=1:16:15 adds in polyester tank, and ball milling is after 6 ~ 12 hours on ball mill, raw material is placed in loft drier in 80 ~ 130 DEG C of oven dry, crosses 40 mesh sieves after drying, obtain evengranular powder;
(2) powder step (1) mixed was 900 ~ 1000 DEG C of calcinings 4 hours;
(3) ceramic powder after step (2) being calcined puts into polyester tank, after adding deionized water and zirconia ball, and ball milling 6-12 hour on ball mill; After the drying in ceramic powder added weight per-cent be 6 ~ 8% paraffin carry out granulation as tackiness agent, cross 80 mesh sieves, then be shaped to base substrate with powder compressing machine;
(4) by the base substrate of step (3) in 1225 ~ 1300 DEG C of sintering, be incubated 2 ~ 5 hours, obtained niobic acid neodymium pottery;
(5) microwave dielectric property of microwave-medium ceramics is tested.
The Nd of described step (1) 2o 3, La 2o 3, Nb 2o 5the purity of raw material is greater than 99.9%.
The calcined temperature of described step (2) is 900 DEG C.
Chemical formula (the Nd of described step (1) 1-xla x) NbO 4, wherein x=0.05.
The sintering temperature of described step (4) is 1250 DEG C, is incubated 4 hours.
The present invention replaces NdNbO owing to have employed lanthanum ion 4the Nd of middle A position, the NdNbO of preparation 4pottery, when sintering temperature is 1250 DEG C, soaking time 4h, ball milling, a secondary ball milling time are 6h, La 2o 3mole number when being 0.05, specific inductivity is 21.52, and quality factor are 45600GHz, and temperature coefficient of resonance frequency reaches 0ppm/ DEG C.Due to large than Nb ion of the ionic polarizability of La ion, so NdNbO 4specific inductivity increase, and after La ionic replacement, structure becomes stable, and now generated product surface is uniform and smooth, and particle size is grown up, and therefore improves microwave dielectric property.In addition, preparation technology of the present invention is simple, and process environmental protection is a kind of promising microwave dielectric material.
Embodiment
The present invention adopts purity to be greater than the chemical feedstocks Nd of 99.9% 2o 3, Nb 2o 5, La 2o 3the lanthanum ion that processability is improved replaces the NdNbO of neodymium ion 4microwave-medium ceramics.
The present invention is by Nd 2o 3, La 2o 3, Nb 2o 5raw material is according to chemical formula (Nd 1-xla x) NbO 4, prepare burden in 0<x≤0.1, materials: deionized water: the ratio of abrading-ball=1:16:15 adds in polyester tank, ball milling 6 ~ 12 hours; Raw material after ball milling is placed in infrared drying oven in 80 ~ 130 DEG C of oven dry, crosses 40 mesh sieves, then in 900 ~ 1000 DEG C of calcinings 4 hours; Again the ceramic powder after calcining is put into ball grinder, add zirconia ball and deionized water ball milling 6 ~ 12 hours post-dryings; Again in ceramic powder after the drying added weight per-cent be 6 ~ 8% paraffin wax binder carry out granulation, after crossing 80 mesh sieves, under the pressure of 8MPa, powder being pressed into diameter with powder compressing machine is 10mm, and thickness is the green compact of 5mm; By green compact at 1225 ~ 1300 DEG C of sintering, be incubated 2 ~ 5 hours, obtained microwave-medium ceramics; Finally by the microwave dielectric property of network analyzer and dependence test fixture test article.
The specific embodiment of the invention is as follows.
Embodiment 1
1. according to microwave-medium ceramics component (Nd 1-xla x) NbO 4(x=0.01), Nd is taken 2o 3-5.5318g, La 2o 3-0.0541g, Nb 2o 5-4.4141g prepares burden, altogether 10g; Mixed powder adds in polyester tank, after adding 160ml deionized water and 150g zirconium ball, and ball milling 6 hours on planetary ball mill, drum's speed of rotation is 1000 revs/min;
2. the raw material after ball milling is placed in loft drier, dries in 120 DEG C and cross 40 mesh sieves, obtaining evengranular powder;
3. powder is calcined 4 hours in 900 DEG C;
4. the powder after calcining is put into polyester tank, secondary ball milling 6 hours, discharging post-drying, cross 40 mesh sieves; Then add weight percent be 6% paraffin carry out granulation as tackiness agent, and cross 80 mesh sieves; Be pressed into diameter for 10mm with powder compressing machine with the pressure of 7MPa again, thickness is the base substrate of 5mm;
5. by base substrate in 1250 DEG C of sintering, be incubated 4 hours, obtained microwave-medium niobic acid neodymium pottery;
Finally, by network analyzer and dependence test fixture test gained sample microwave property.
Embodiment 2
1. according to microwave-medium ceramics component (Nd 1-xla x) NbO 4(x=0.02), Nd is taken 2o 3-5.4769g, La 2o 3-0.1082g, Nb 2o 5-4.4149g prepares burden, altogether 10g; Mixed powder adds in polyester tank, after adding 160ml deionized water and 150g zirconium ball, and ball milling 6 hours on planetary ball mill, drum's speed of rotation is 1000 revs/min;
2. the raw material after ball milling is placed in loft drier, dries in 120 DEG C and cross 40 mesh sieves, obtaining evengranular powder;
3. powder is calcined 4 hours in 900 DEG C;
4. the powder after calcining is put into polyester tank, secondary ball milling 6 hours, discharging post-drying, cross 40 mesh sieves; Then add weight percent be 6% paraffin carry out granulation as tackiness agent, and cross 80 mesh sieves; Be pressed into diameter for 10mm with powder compressing machine with the pressure of 7MPa again, thickness is the base substrate of 5mm;
5. by base substrate in 1250 DEG C of sintering, be incubated 4 hours, obtained microwave-medium niobic acid neodymium pottery;
Finally, by network analyzer and dependence test fixture test gained sample microwave property.
Embodiment 3
1. according to microwave-medium ceramics component (Nd 1-xla x) NbO 4(x=0.03), Nd is taken 2o 3-5.4220g, La 2o 3-0.1624g, Nb 2o 5-4.4156g prepares burden, altogether 10g; Mixed powder adds in polyester tank, after adding 160ml deionized water and 150g zirconium ball, and ball milling 6 hours on planetary ball mill, drum's speed of rotation is 1000 revs/min;
2. the raw material after ball milling is placed in loft drier, dries in 120 DEG C and cross 40 mesh sieves, obtaining evengranular powder;
3. powder is calcined 4 hours in 900 DEG C;
4. the powder after calcining is put into polyester tank, secondary ball milling 6 hours, discharging post-drying, cross 40 mesh sieves; Then add weight percent be 6% paraffin carry out granulation as tackiness agent, and cross 80 mesh sieves; Be pressed into diameter for 10mm with powder compressing machine with the pressure of 7MPa again, thickness is the base substrate of 5mm;
5. by base substrate in 1250 DEG C of sintering, be incubated 4 hours, obtained microwave-medium niobic acid neodymium pottery;
Finally, by network analyzer and dependence test fixture test gained sample microwave property.
Embodiment 4
1. according to microwave-medium ceramics component (Nd 1-xla x) NbO 4(x=0.05), Nd is taken 2o 3-5.3120g, La 2o 3-0.2707g, Nb 2o 5-4.4173g prepares burden, altogether 10g; Mixed powder adds in polyester tank, after adding 160ml deionized water and 150g zirconium ball, and ball milling 6 hours on planetary ball mill, drum's speed of rotation is 1000 revs/min;
2. the raw material after ball milling is placed in loft drier, dries in 120 DEG C and cross 40 mesh sieves, obtaining evengranular powder;
3. powder is calcined 4 hours in 900 DEG C;
4. the powder after calcining is put into polyester tank, secondary ball milling 6 hours, discharging post-drying, cross 40 mesh sieves; Then add weight percent be 6% paraffin carry out granulation as tackiness agent, and cross 80 mesh sieves; Be pressed into diameter for 10mm with powder compressing machine with the pressure of 7MPa again, thickness is the base substrate of 5mm;
5. by base substrate in 1250 DEG C of sintering, be incubated 4 hours, obtained microwave-medium niobic acid neodymium pottery;
Finally, by network analyzer and dependence test fixture test gained sample microwave property.
Embodiment 5
1. according to microwave-medium ceramics component (Nd 1-xla x) NbO 4(x=0.1), Nd is taken 2o 3-5.0369g, La 2o 3-0.5419g, Nb 2o 5-4.4212g prepares burden, altogether 10g; Mixed powder adds in polyester tank, after adding 160ml deionized water and 150g zirconium ball, and ball milling 6 hours on planetary ball mill, drum's speed of rotation is 1000 revs/min;
2. the raw material after ball milling is placed in loft drier, dries in 120 DEG C and cross 40 mesh sieves, obtaining evengranular powder;
3. powder is calcined 4 hours in 900 DEG C;
4. the powder after calcining is put into polyester tank, secondary ball milling 6 hours, discharging post-drying, cross 40 mesh sieves; Then add weight percent be 6% paraffin carry out granulation as tackiness agent, and cross 80 mesh sieves; Be pressed into diameter for 10mm with powder compressing machine with the pressure of 7MPa again, thickness is the base substrate of 5mm;
5. by base substrate in 1250 DEG C of sintering, be incubated 4 hours, obtained microwave-medium niobic acid neodymium pottery;
Finally, by network analyzer and dependence test fixture test gained sample microwave property.
Embodiment 6
1. according to microwave-medium ceramics component (Nd 1-xla x) NbO 4(x=0.05), Nd is taken 2o 3-5.3867g, La 2o 3-0.2745g, Nb 2o 5-4.3388g prepares burden, altogether 10g; Mixed powder adds in polyester tank, after adding 160ml deionized water and 150g zirconium ball, and ball milling 6 hours on planetary ball mill, drum's speed of rotation is 1000 revs/min;
2. the raw material after ball milling is placed in loft drier, dries in 120 DEG C and cross 40 mesh sieves, obtaining evengranular powder;
3. powder is calcined 4 hours in 900 DEG C;
4. the powder after calcining is put into polyester tank, secondary ball milling 6 hours, discharging post-drying, cross 40 mesh sieves; Then add weight percent be 6% paraffin carry out granulation as tackiness agent, and cross 80 mesh sieves; Be pressed into diameter for 10mm with powder compressing machine with the pressure of 7MPa again, thickness is the base substrate of 5mm;
5. by base substrate in 1225 DEG C of sintering, be incubated 4 hours, obtained microwave-medium niobic acid neodymium pottery;
Finally, by network analyzer and dependence test fixture test gained sample microwave property.
Embodiment 7
1. according to microwave-medium ceramics component (Nd 1-xla x) NbO 4(x=0.05), Nd is taken 2o 3-5.3867g, La 2o 3-0.2745g, Nb 2o 5-4.3388g prepares burden, altogether 10g; Mixed powder adds in polyester tank, after adding 160ml deionized water and 150g zirconium ball, and ball milling 6 hours on planetary ball mill, drum's speed of rotation is 1000 revs/min;
2. the raw material after ball milling is placed in loft drier, dries in 120 DEG C and cross 40 mesh sieves, obtaining evengranular powder;
3. powder is calcined 4 hours in 900 DEG C;
4. the powder after calcining is put into polyester tank, secondary ball milling 6 hours, discharging post-drying, cross 40 mesh sieves; Then add weight percent be 6% paraffin carry out granulation as tackiness agent, and cross 80 mesh sieves; Be pressed into diameter for 10mm with powder compressing machine with the pressure of 7MPa again, thickness is the base substrate of 5mm;
5. by base substrate in 1275 DEG C of sintering, be incubated 4 hours, obtained microwave-medium niobic acid neodymium pottery;
Finally, by network analyzer and dependence test fixture test gained sample microwave property.
Embodiment 8
1. according to microwave-medium ceramics component (Nd 1-xla x) NbO 4(x=0.05), Nd is taken 2o 3-5.3867g, La 2o 3-0.2745g, Nb 2o 5-4.3388g prepares burden, altogether 10g; Mixed powder adds in polyester tank, after adding 160ml deionized water and 150g zirconium ball, and ball milling 6 hours on planetary ball mill, drum's speed of rotation is 1000 revs/min;
2. the raw material after ball milling is placed in loft drier, dries in 120 DEG C and cross 40 mesh sieves, obtaining evengranular powder;
3. powder is calcined 4 hours in 900 DEG C;
4. the powder after calcining is put into polyester tank, secondary ball milling 6 hours, discharging post-drying, cross 40 mesh sieves; Then add weight percent be 6% paraffin carry out granulation as tackiness agent, and cross 80 mesh sieves; Be pressed into diameter for 10mm with powder compressing machine with the pressure of 7MPa again, thickness is the base substrate of 5mm;
5. by base substrate in 1300 DEG C of sintering, be incubated 4 hours, obtained microwave-medium niobic acid neodymium pottery;
Finally, by network analyzer and dependence test fixture test gained sample microwave property.
Embodiment 9
1. according to microwave-medium ceramics component (Nd 1-xla x) NbO 4(x=0.05), Nd is taken 2o 3-5.3867g, La 2o 3-0.2745g, Nb 2o 5-4.3388g prepares burden, altogether 10g; Mixed powder adds in polyester tank, after adding 160ml deionized water and 150g zirconium ball, and ball milling 6 hours on planetary ball mill, drum's speed of rotation is 1000 revs/min;
2. the raw material after ball milling is placed in loft drier, dries in 120 DEG C and cross 40 mesh sieves, obtaining evengranular powder;
3. powder is calcined 4 hours in 1000 DEG C;
4. the powder after calcining is put into polyester tank, secondary ball milling 6 hours, discharging post-drying, cross 40 mesh sieves; Then add weight percent be 6% paraffin carry out granulation as tackiness agent, and cross 80 mesh sieves; Be pressed into diameter for 10mm with powder compressing machine with the pressure of 7MPa again, thickness is the base substrate of 5mm;
5. by base substrate in 1250 DEG C of sintering, be incubated 4 hours, obtained microwave-medium niobic acid neodymium pottery;
Finally, by network analyzer and dependence test fixture test gained sample microwave property.
Embodiment 10
1. according to microwave-medium ceramics component (Nd 1-xla x) NbO 4(x=0.05), Nd is taken 2o 3-5.3867g, La 2o 3-0.2745g, Nb 2o 5-4.3388g prepares burden, altogether 10g; Mixed powder adds in polyester tank, after adding 160ml deionized water and 150g zirconium ball, and ball milling 6 hours on planetary ball mill, drum's speed of rotation is 1000 revs/min;
2. the raw material after ball milling is placed in loft drier, dries in 120 DEG C and cross 40 mesh sieves, obtaining evengranular powder;
3. powder is calcined 4 hours in 900 DEG C;
4. the powder after calcining is put into polyester tank, secondary ball milling 12 hours, discharging post-drying, cross 40 mesh sieves; Then add weight percent be 6% paraffin carry out granulation as tackiness agent, and cross 80 mesh sieves; Be pressed into diameter for 10mm with powder compressing machine with the pressure of 7MPa again, thickness is the base substrate of 5mm;
5. by base substrate in 1250 DEG C of sintering, be incubated 4 hours, obtained microwave-medium niobic acid neodymium pottery;
Finally, by network analyzer and dependence test fixture test gained sample microwave property.
Embodiment 11
1. according to microwave-medium ceramics component (Nd 1-xla x) NbO 4(x=0.05), Nd is taken 2o 3-5.3867g, La 2o 3-0.2745g, Nb 2o 5-4.3388g prepares burden, altogether 10g; Mixed powder adds in polyester tank, after adding 160ml deionized water and 150g zirconium ball, and ball milling 12 hours on planetary ball mill, drum's speed of rotation is 1000 revs/min;
2. the raw material after ball milling is placed in loft drier, dries in 120 DEG C and cross 40 mesh sieves, obtaining evengranular powder;
3. powder is calcined 4 hours in 900 DEG C;
4. the powder after calcining is put into polyester tank, secondary ball milling 6 hours, discharging post-drying, cross 40 mesh sieves; Then add weight percent be 6% paraffin carry out granulation as tackiness agent, and cross 80 mesh sieves; Be pressed into diameter for 10mm with powder compressing machine with the pressure of 7MPa again, thickness is the base substrate of 5mm;
5. by base substrate in 1250 DEG C of sintering, be incubated 4 hours, obtained microwave-medium niobic acid neodymium pottery;
Finally, by network analyzer and dependence test fixture test gained sample microwave property.
Embodiment 12
1. according to microwave-medium ceramics component (Nd 1-xla x) NbO 4(x=0.05), Nd is taken 2o 3-5.3867g, La 2o 3-0.2745g, Nb 2o 5-4.3388g prepares burden, altogether 10g; Mixed powder adds in polyester tank, after adding 160ml deionized water and 150g zirconium ball, and ball milling 12 hours on planetary ball mill, drum's speed of rotation is 1000 revs/min;
2. the raw material after ball milling is placed in loft drier, dries in 120 DEG C and cross 40 mesh sieves, obtaining evengranular powder;
3. powder is calcined 4 hours in 900 DEG C;
4. the powder after calcining is put into polyester tank, secondary ball milling 12 hours, discharging post-drying, cross 40 mesh sieves; Then add weight percent be 6% paraffin carry out granulation as tackiness agent, and cross 80 mesh sieves; Be pressed into diameter for 10mm with powder compressing machine with the pressure of 7MPa again, thickness is the base substrate of 5mm;
5. by base substrate in 1250 DEG C of sintering, be incubated 4 hours, obtained microwave-medium niobic acid neodymium pottery;
Finally, by network analyzer and dependence test fixture test gained sample microwave property.
Every key parameter and the dielectric properties detected result of the embodiment of the present invention refer to table 1.
Table 1
The detection method of the embodiment of the present invention is as follows:
1. the diameter of sample and thickness use milscale to measure.
2. by Agilent 8720ES network analyzer, adopt and start to rob the dielectric constant that parallel plate method measures prepared cylindrical ceramic material, test fixture is put into the measurement that ESPEC MC-710F type high/low temperature circulation incubator carries out temperature coefficient of resonance frequency, temperature range is that 25-85 DEG C of test frequency is within the scope of 9-12GHz.
3. adopt enclosed cell method to measure the quality factor of prepared cylindrical ceramic sample, test frequency is within the scope of 8-11GHz.
The present invention is not limited to above-described embodiment, and the change of a lot of details is possible, but therefore this do not run counter to scope and spirit of the present invention.

Claims (5)

1. a lanthanum ion replaces neodymium ion to improve the niobic acid neodymium pottery of microwave dielectric property, it consists of (Nd 1-xla x) NbO 4, wherein, mole number x is 0<x≤0.1;
The preparation method of above-mentioned niobic acid neodymium pottery, has following steps:
(1) by Nd 2o 3, La 2o 3, Nb 2o 5raw material, by chemical formula (Nd 1-xla x) NbO 4, wherein prepare burden in 0<x≤0.1; In raw material: deionized water: the ratio of abrading-ball=1:16:15 adds in polyester tank, and ball milling is after 6 ~ 12 hours on ball mill, raw material is placed in loft drier in 80 ~ 130 DEG C of oven dry, crosses 40 mesh sieves after drying, obtain evengranular powder;
(2) powder step (1) mixed was 900 ~ 1000 DEG C of calcinings 4 hours;
(3) ceramic powder after step (2) being calcined puts into polyester tank, after adding deionized water and zirconia ball, and ball milling 6-12 hour on ball mill; After the drying in ceramic powder added weight per-cent be 6 ~ 8% paraffin carry out granulation as tackiness agent, cross 80 mesh sieves, then be shaped to base substrate with powder compressing machine;
(4) by the base substrate of step (3) in 1225 ~ 1300 DEG C of sintering, be incubated 2 ~ 5 hours, obtained niobic acid neodymium pottery.
(5) microwave dielectric property of microwave-medium ceramics is tested.
2. a kind of lanthanum ion according to claim 1 replaces neodymium ion to improve the niobic acid neodymium pottery of microwave dielectric property, it is characterized in that, the Nd of described step (1) 2o 3, La 2o 3, Nb 2o 5the purity of raw material is greater than 99.9%.
3. a kind of lanthanum ion according to claim 1 replaces neodymium ion to improve the niobic acid neodymium pottery of microwave dielectric property, and it is characterized in that, described step (2) calcined temperature is 900 DEG C.
4. a kind of lanthanum ion according to claim 1 replaces neodymium ion to improve the niobic acid neodymium pottery of microwave dielectric property, it is characterized in that, the chemical formula (Nd of described step (1) 1-xla x) NbO 4, wherein x=0.05.
5. a kind of lanthanum ion according to claim 1 replaces neodymium ion to improve the niobic acid neodymium pottery of microwave dielectric property, and it is characterized in that, the sintering temperature of described step (4) is 1250 DEG C, is incubated 4 hours.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105254301A (en) * 2015-10-30 2016-01-20 天津大学 High quality factor neodymium niobate microwave dielectric ceramics prepared by substituting yttrium ions for neodymium ions
CN106565241A (en) * 2016-11-04 2017-04-19 天津大学 High-performance lanthanium niobate series microwave dielectric ceramic
CN108794004A (en) * 2017-05-04 2018-11-13 中国科学院福建物质结构研究所 A kind of lanthanum neodymium doping nickelate ceramics and its preparation method and application
CN107586133A (en) * 2017-09-20 2018-01-16 中国矿业大学 A kind of high performance microwave medium ceramic material, preparation method and application
CN107586133B (en) * 2017-09-20 2019-06-21 中国矿业大学 A kind of high performance microwave medium ceramic material, preparation method and application

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