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High Q electricity adjustable Ba1-xSrxTi1-yMnyO3 ceramic dielectric material and preparation thereof

A ceramic dielectric and ceramic technology, applied in the direction of ceramics, inorganic insulators, etc., can solve the problems that the study of microwave dielectric tunable characteristics has not yet been reported, and achieve the effect of high dielectric tunability

Inactive Publication Date: 2012-07-04
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Ba 1-x Sr x Ti 1-y mn y o 3 There are no related reports on the microwave dielectric tunable properties of ceramic dielectric materials

Method used

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  • High Q electricity adjustable Ba1-xSrxTi1-yMnyO3 ceramic dielectric material and preparation thereof
  • High Q electricity adjustable Ba1-xSrxTi1-yMnyO3 ceramic dielectric material and preparation thereof
  • High Q electricity adjustable Ba1-xSrxTi1-yMnyO3 ceramic dielectric material and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 Preparation of high-Q electrically tunable Ba 0.4 Sr 0.6 Ti 1-y mn y o 3 ceramic dielectric material

[0028] According to Ba 0.4 Sr 0.6 Ti 1-y mn y o 3 (y=1,5,10,20mol%) stoichiometric ratio, take a certain amount of BaCO 3 , SrCO 3 、TiO 2 and MnCO 3 Raw materials (as shown in Table 1).

[0029] Raw material source: BaCO 3 (99.8%, Alfa Aesar China LTD.), SrCO 3 (99.0%, Alfa Aesar China LTD.), TiO 2 (99.9%, Foshan High-tech Inorganic Materials Co., Ltd.) and MnCO 3 (44.0% as Mn, Alfa Aesar China LTD.)

[0030] Table 1.Ba0.4 Sr 0.6 Ti 1-y mn y o 3 Proportion of ceramic dielectric materials

[0031]

[0032] Put the above powder in a nylon ball mill jar, add zirconia balls and absolute ethanol or deionized water, and mill for 24 hours. In the nylon ball mill jar, add zirconia balls and absolute ethanol or deionized water, ball mill for 24 hours, and the powder after discharging and drying passes through a 200-mesh sieve; according to th...

Embodiment Ba0

[0036] Example Ba 0.4 Sr 0.6 Ti 1-y mn y o 3 (y=1,5,10,20mol%) the X-ray diffraction analysis spectrum of dielectrically adjustable microwave ceramic dielectric material is as figure 1 As shown, the results show that its composition is in the cubic and hexagonal structure Ba 1-x Sr x TiO 3 Coexistence of two phases; Example Ba 0.4 Sr 0.6 Ti 1-y mn y o 3 (y=1, 5, 10, 20mol%) the dielectric constant of the dielectrically adjustable microwave ceramic dielectric material and the relationship curve of loss and temperature are as follows figure 2 As shown, the results show that the stoichiometric doping of MnCO 3 Effectively suppress and broaden the dielectric peak, and the Curie peak moves rapidly to the low temperature direction with the increase of doping amount; Example Ba 0.4 Sr 0.6 Ti 1-y mn y o 3 (y=1, 5, 10, 20mol%) the relational curve of the dielectric constant and the electric field strength of the dielectrically adjustable microwave ceramic dielectric m...

Embodiment 2

[0037] Example 2 Preparation of high-Q electrically tunable Ba 0.9 Sr 0.1 Ti 1-y mn y o 3 ceramic dielectric material

[0038] According to Ba 0.9 Sr 0.1 Ti 1-y mn y o 3 (y=1,5,10,20mol%) stoichiometric ratio, take a certain amount of BaCO 3 , SrCO 3 、TiO 2 and MnCO 3 Raw materials (as shown in Table 3).

[0039] Table 3. Ba 0.9 Sr 0.1 Ti 1-y mn y o 3 Proportion of ceramic dielectric materials

[0040]

[0041] Put the above powder in a nylon ball mill jar, add zirconia balls and absolute ethanol or deionized water, and mill for 24 hours. In the nylon ball mill jar, add zirconia balls and absolute ethanol or deionized water, ball mill for 24 hours, and the powder after discharging and drying passes through a 200-mesh sieve; according to the traditional electronic ceramic preparation process, 8% polyvinyl alcohol ( PVA) is used as a binder to granulate, and under a pressure of 10MPa, it is dry-pressed into a diameter Green sheets and cylinders of 10mm×5...

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Abstract

The invention belongs to the technical field of electronic material and apparatus, and discloses a high Q electric adjustable Ba1-xSrxTi1-yMnyO3 ceramics medium material and preparation thereof. The component of the ceramics medium material of the invention is Ba1-xSrxTi1-yMnyO3; wherein, x is equal to 0.1 to 0.9, and y is equal to 0.01 to 0.20. The adjustable microwave ceramics medium material of the invention has the advantages of the double-phase Ba1-xSrxTiO3 structure of a cubic structure and a hexagon structure, low dielectric constant, high dielectric tunability and high Q value, and can be used on the adjustable microwave apparatuses like an electric tuning microwave resonator, a filter, a microwave medium antenna, and the like.

Description

technical field [0001] The invention belongs to the technical field of electronic materials and devices, in particular to a Ba 1-x Sr x Ti 1-y mn y o 3 An electrically tunable microwave ceramic dielectric material, which can be used as a material for tunable microwave components such as electrically tunable microwave resonators, filters, and microwave dielectric antennas. Background technique [0002] Perovskite structure Ba with high dielectric constant, low dielectric loss, nonlinear tunable dielectric constant and tunable Curie temperature 1-x Sr x TiO 3 Ferroelectric materials have attracted increasing attention as microwave tunable devices (such as phase shifters, filters, variable capacitors, and delay lines, etc.), especially as microwave phase shifters. However, the BST ceramic material with high dielectric constant is difficult to meet the requirements of internal impedance matching and high power of the excitation source, which greatly limits its application...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/468C04B35/47C04B35/622H01B3/12
Inventor 翟继卫张景基张明伟
Owner TONGJI UNIV
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