CN109231984A - A method of calculating barium zirconate titanate-based block materials dielectric constant - Google Patents

A method of calculating barium zirconate titanate-based block materials dielectric constant Download PDF

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CN109231984A
CN109231984A CN201811219346.5A CN201811219346A CN109231984A CN 109231984 A CN109231984 A CN 109231984A CN 201811219346 A CN201811219346 A CN 201811219346A CN 109231984 A CN109231984 A CN 109231984A
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block materials
dielectric constant
zirconate titanate
thickness
based block
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李玲霞
郑浩然
于仕辉
杨盼
陈思亮
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Tianjin University
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    • C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
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    • C04B35/468—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates
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Abstract

The invention discloses a kind of methods for calculating barium zirconate titanate-based block materials dielectric constant, first by raw material BaCO3、Bi2O3、ZrO2And TiO2According to Ba0.9988Bi0.0008Zr0.2Ti0.8O3Stoichiometric ratio mix, be made bismuth ion doping barium zirconium phthalate ceramics block materials；Again with the thickness d of block materials sampleTAs abscissa, with the ratio between thickness and routine test dielectric constant dT/εTAs ordinate, the test data of different-thickness sample is made into d using 8 software of OriginProT/εTWith dTVariation relation figure, according to derivation formula:Linear fit is carried out to result, the inverse of straight slope is the dielectric constant of barium zirconate titanate-based block materials.The present invention is simple and feasible, and applicability is wide, and the research and application development to dielectric material have positive influence.

Description

A method of calculating barium zirconate titanate-based block materials dielectric constant
Technical field
The invention belongs to electronic information materials and component field, and in particular to a kind of to calculate barium zirconate titanate-based block materials The method of dielectric constant.
Background technique
With the fast development of radar system, mechanics of communication, it is desirable that the scanning of the multiple frequency ranges of communication system energy complete independently, Reduce signal decaying, make data transmission apart from farther, therefore to broadband, filter with low insertion loss, high power bearing capacity microwave device Demand is increasingly urgent to.Voltage-controlled tuning material is because its dielectric constant is adjustable, the frequency applied to microwave signal modulated in microwave circuit Rate, phase, amplitude etc., effectively reduce device count, reduce cost.Common voltage-controlled tuning material is (BaxSr1-xTiO3, BST) Material, dielectric constant is larger, and electric field response speed is fast, and tuning rate is higher, but larger, thin film composition is lost in BST dielectric material Easily deviate, is not able to satisfy engineering application requirement.
Barium zirconium phthalate (BaZrxTi1-xO3, BZT) and material dielectric constant is larger, and dielectric tunability is excellent.As x=0.2, The Curie temperature of BZT material is strong to the sensibility of extra electric field near room temperature, the at this time dielectric constant of material, i.e. dielectric tuning Characteristic is strong.And studies have shown that bismuth ion doping can reduce the dielectric loss of dielectric material, therefore selection Bi3+Ion doping BaZr0.2Ti0.8O3Component ceramic material.To carry out electrical performance testing, block materials usually coat silver paste on sample two sides, and Heating handled by silver, and the interface formed between electrode and block materials will affect the test of dielectric material performance, therefore The dielectric constant for calculating block materials is of great significance to the research and application of dielectric material.
Summary of the invention
The purpose of the present invention is to cannot exclude interface between electrode and block materials for the prior art to dielectric material The influence problem of performance test provides a kind of method for calculating barium zirconate titanate-based block materials dielectric constant.
The present invention is achieved by following technical solution.
A method of calculating barium zirconate titanate-based block materials dielectric constant, the specific steps are as follows:
(1) by raw material BaCO3、Bi2O3、ZrO2And TiO2According to Ba0.9988Bi0.0008Zr0.2Ti0.8O3Stoichiometric ratio into Row mix, using customary preparation methods, by ball milling, pre-burning, secondary ball milling, sieving, compression moulding, a dumping, in 1200~1300 DEG C are sintered, and the block materials of the barium zirconium phthalate ceramics of bismuth ion doping are made；
(2) it calculates
With the thickness d of the block materials sample of the barium zirconium phthalate ceramics of bismuth ion dopingTAs abscissa, with thickness and often The ratio between rule test dielectric constant dT/εTAs ordinate, using 8 software of OriginPro by the test data of different-thickness sample Make dT/εTWith dTVariation relation figure, according to derivation formula:
Linear fit is carried out to result, the inverse of straight slope is the dielectric constant of barium zirconate titanate-based block materials.
The BaCO of the step (1)3、Bi2O3、ZrO2And TiO2The quality purity of raw material is 99% or more.
The method disclosed by the invention for calculating barium zirconate titanate-based block materials dielectric constant, simple and feasible, applicability is wide, right The research of dielectric material and application development have positive influence.
Detailed description of the invention
Fig. 1 is the d made according to Examples 1 to 4 Example Test DataT/εTWith dTVariation relation figure.
Specific embodiment
The present invention is further explained combined with specific embodiments below, it should be appreciated that these embodiments are merely to illustrate the present invention Rather than it limits the scope of the invention.
Embodiment 1
Use purity for 99% or more BaCO3、Bi2O3、ZrO2And TiO2For raw material, according to Ba0.9988Bi0.0008Zr0.2Ti0.8O3Stoichiometric ratio is mixed, and the volume ratio according still further to raw material, deionized water and abrading-ball is 1:1:1 ball milling 6 hours；The powder after the completion of a ball milling is dried again, is put into medium temperature Muffle furnace in 1100 DEG C of progress pre-burnings, Heat preservation 4 hours；The PVA for adding 0.5wt%, the volume ratio according to powder, deionized water and abrading-ball are 1:1:1 secondary ball milling 12 Hour；The powder after secondary ball milling is dried in 100 DEG C again, crosses 80 meshes；Weigh 0.18 gram sieving after powder be put into mould In tool, compression moulding is ceramic green；Green compact are put into low temperature oven in 700 DEG C of progress dumpings；It is sintered then at 1200 DEG C, heat preservation 4 Hour, bismuth ion is made and adulterates barium zirconium phthalate ceramic block.
Embodiment 2
Use purity for 99% or more BaCO3、Bi2O3、ZrO2And TiO2For raw material, according to Ba0.9988Bi0.0008Zr0.2Ti0.8O3Stoichiometric ratio is mixed, and the volume ratio according still further to raw material, deionized water and abrading-ball is 1:1:1 ball milling 6 hours；The powder after the completion of a ball milling is dried again, is put into medium temperature Muffle furnace in 1100 DEG C of progress pre-burnings, Heat preservation 4 hours；The PVA for adding 0.5wt%, the volume ratio according to powder, deionized water and abrading-ball are 1:1:1 secondary ball milling 12 Hour；The powder after secondary ball milling is dried in 100 DEG C again, crosses 80 meshes；Weigh 0.19 gram sieving after powder be put into mould In tool, compression moulding is ceramic green；Green compact are put into low temperature oven in 700 DEG C of progress dumpings；It is sintered then at 1260 DEG C, heat preservation 4 Hour, bismuth ion is made and adulterates barium zirconium phthalate ceramic block material.
Embodiment 3
Use purity for 99% or more BaCO3、Bi2O3、ZrO2And TiO2For raw material, according to Ba0.9988Bi0.0008Zr0.2Ti0.8O3Stoichiometric ratio is mixed, and the volume ratio according still further to raw material, deionized water and abrading-ball is 1:1:1 ball milling 6 hours；The powder after the completion of a ball milling is dried again, is put into medium temperature Muffle furnace in 1100 DEG C of progress pre-burnings, Heat preservation 4 hours；The PVA for adding 0.5wt%, the volume ratio according to powder, deionized water and abrading-ball are 1:1:1 secondary ball milling 12 Hour；The powder after secondary ball milling is dried in 100 DEG C again, crosses 80 meshes；Weigh 0.20 gram sieving after powder be put into mould In tool, compression moulding is ceramic green；Green compact are put into low temperature oven in 700 DEG C of progress dumpings；It is sintered then at 1260 DEG C, heat preservation 4 Hour, bismuth ion is made and adulterates barium zirconium phthalate ceramic block material.
Embodiment 4
Use purity for 99% or more BaCO3、Bi2O3、ZrO2And TiO2For raw material, according to Ba0.9988Bi0.0008Zr0.2Ti0.8O3Stoichiometric ratio is mixed, and the volume ratio according still further to raw material, deionized water and abrading-ball is 1:1:1 ball milling 6 hours；The powder after the completion of a ball milling is dried again, is put into medium temperature Muffle furnace in 1100 DEG C of progress pre-burnings, Heat preservation 4 hours；The PVA for adding 0.5wt%, the volume ratio according to powder, deionized water and abrading-ball are 1:1:1 secondary ball milling 12 Hour；The powder after secondary ball milling is dried in 100 DEG C again, crosses 80 meshes；Weigh 0.21 gram sieving after powder be put into mould In tool, compression moulding is ceramic green；Green compact are put into low temperature oven in 700 DEG C of progress dumpings；It is sintered then at 1300 DEG C, heat preservation 4 Hour, bismuth ion is made and adulterates barium zirconium phthalate ceramic block material.
According to above-described embodiment, the dielectric constant of bismuth ion doping barium zirconium phthalate ceramic block material can be calculated.Consider The capacitance of influence to the interface between electrode and block materials to dielectric material performance test, routine test sample can indicate For
Wherein, CT, CBAnd CIRespectively represent routine test capacitance, block materials capacitance and electrode and block materials it Between interface capacitance value.In conjunction with capacitor definition, routine test dielectric constant can be derived from by above formula:
Wherein, dT, dBAnd dIRespectively indicate the interface between thickness of sample, block materials thickness and electrode and block materials Thickness；εT, εBAnd εIIt respectively indicates between routine test dielectric constant, block materials dielectric constant and electrode and block materials Interface capacitance dielectric constant.The thickness of block materials is represented by
dB=dT-2dI
Being substituted into routine test dielectric constant expression formula and carrying out mathematical derivation can be obtained:
Finally obtain following derivation formula:
With the thickness d of ceramic block material sampleTAs abscissa, with the ratio between thickness and routine test dielectric constant dT/εT As ordinate, the test data of Examples 1 to 4 sample is made into d using 8 software of OriginPro (commercial software product)T/εT With dTVariation relation figure (Fig. 1), and linear fit is carried out to result, straight slope is inverted, it obtains Ba0.9988Bi0.0008Zr0.2Ti0.8O3The dielectric constant of block materials is 9949.

Claims (2)

1. a kind of method for calculating barium zirconate titanate-based block materials dielectric constant, the specific steps are as follows:
(1) by raw material BaCO3、Bi2O3、ZrO2And TiO2According to Ba0.9988Bi0.0008Zr0.2Ti0.8O3Stoichiometric ratio mixed Ingredient is closed, using customary preparation methods, by ball milling, pre-burning, secondary ball milling, sieving, compression moulding, a dumping, in 1200 ~1300 DEG C are sintered, and the block materials of the barium zirconium phthalate ceramics of bismuth ion doping are made；
(2) it calculates
With the thickness d of the block materials sample of the barium zirconium phthalate ceramics of bismuth ion dopingTAs abscissa, with thickness and conventional survey Try the ratio between dielectric constant dT/εTAs ordinate, the test data of different-thickness sample is made into d using 8 software of OriginProT/ εTWith dTVariation relation figure, according to derivation formula:
Linear fit is carried out to result, the inverse of straight slope is the dielectric constant of barium zirconate titanate-based block materials.
2. a kind of method for calculating barium zirconate titanate-based block materials dielectric constant according to claim 1, which is characterized in that The BaCO of the step (1)3、Bi2O3、ZrO2And TiO2The quality purity of raw material is 99% or more.
CN201811219346.5A 2018-10-19 2018-10-19 A method of calculating barium zirconate titanate-based block materials dielectric constant Pending CN109231984A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5566803A (en) * 1978-11-10 1980-05-20 Matsushita Electric Ind Co Ltd High permittivity porcelain dielectric composition
CN107586130A (en) * 2017-09-06 2018-01-16 天津大学 A kind of intermediate sintering temperature low-loss barium phthalate base dielectric material and preparation method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5566803A (en) * 1978-11-10 1980-05-20 Matsushita Electric Ind Co Ltd High permittivity porcelain dielectric composition
CN107586130A (en) * 2017-09-06 2018-01-16 天津大学 A kind of intermediate sintering temperature low-loss barium phthalate base dielectric material and preparation method thereof

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
A. LOOKMAN ET AL.: "Thickness independence of true phase transition temperatures in barium strontium titanate films", 《JOURNAL OF APPLIED PHYSICS》 *
A. VISINOIU ET AL.: "Morphology dependence of the dielectric properties of epitaxial BaTiO3 films and epitaxial BaTiO3/SrTiO3 multilayers", 《APPL. PHYS. A》 *
T. BADAPANDA ET AL.: "Dielectric relaxation on Ba1-xBi2x/3Zr0.25Ti0.75O3 ceramic", 《MATERIALS CHEMISTRY AND PHYSICS》 *

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Application publication date: 20190118