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Microwave dielectrically-adjustable material of barium strontium titanate composite molybdate and preparation method for same

A technology of composite molybdate and barium strontium titanate, which is applied in the field of barium strontium titanate-based microwave ceramic dielectric materials, achieves high Q value, low cost and excellent performance

Inactive Publication Date: 2012-06-27
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Ba 1-y Sr y TiO 3 AMoO with excellent microwave dielectric properties 4 (A=Ba, Sr, Ca, Mn, Mg, Zn, Co) (ε r =8-10, Q*f, the highest can reach 89700GHz) compound and its dielectric properties have not yet seen relevant reports

Method used

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  • Microwave dielectrically-adjustable material of barium strontium titanate composite molybdate and preparation method for same
  • Microwave dielectrically-adjustable material of barium strontium titanate composite molybdate and preparation method for same
  • Microwave dielectrically-adjustable material of barium strontium titanate composite molybdate and preparation method for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1 Preparation of 80% Ba with high Q value and adjustable dielectric 0.4 Sr 0.6 TiO 3 +20% BaMoO 4 ceramic dielectric material

[0036] According to 80% Ba 0.4 Sr 0.6 TiO 3 +20% SrMoO 4 The stoichiometric ratio of Ba, Sr, Ti and Mo in the ingredients, weigh BaCO 3 , SrCO 3 、TiO 2 、MoO 3 Raw materials (as shown in Table 1-a).

[0037] 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 MoO 3 (99.99%, Sinopharm Chemical Reagent Co., Ltd.).

[0038] Table 1-a 80% Ba 0.4 Sr 0.6 TiO 3 +20% BaMoO 4 Proportion of ceramic dielectric materials

[0039] formula

mass (g)

BaCO 3

44.3

[0040] SrCO 3

34.7

TiO 2

31.4

MoO 3

9.6

[0041] Put the above-mentioned raw material powder in a nylon ball mill jar, add zirconia balls and absolute ethanol or deionized ...

Embodiment 2

[0045] Example 2 Preparation of 80% Ba with high Q value and adjustable dielectric 0.5 Sr 0.5 TiO 3 +20% SrMoO 4 ceramic dielectric material

[0046] According to 80% Ba 0.5 Sr 0.5 TiO 3 +20% SrMoO 4 The stoichiometric ratio of Ba, Sr, Ti and Mo in, weigh BaCO 3 , SrCO 3 、TiO 2 、MoO 3 Raw materials (as shown in Table 1-b).

[0047] 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 MoO 3 (99.99%, Sinopharm Chemical Reagent Co., Ltd.).

[0048] Table 1-b. 80% Ba 0.5 Sr 0.5 TiO 3 +20% SrMoO 4 Proportion of ceramic dielectric materials

[0049] formula

mass (g)

BaCO 3

34.2

SrCO 3

37.5

TiO 2

27.7

MoO 3

11

[0050] 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,...

Embodiment 3

[0054] Example 3 Preparation of 70% Ba with high Q value and adjustable dielectric 0.6 Sr 0.4 TiO 3 +30%SrMoO 4 ceramic dielectric material

[0055] According to 70% Ba 0.6 Sr 0.4 TiO 3 +30%SrMoO 4The stoichiometric ratio of Ba, Sr, Ti and Mo in the ingredients, weigh BaCO 3 , SrCO 3 、TiO 2 、MoO 3 Raw materials (as shown in Table 1-c).

[0056] 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 MoO 3 (99.99%, Sinopharm Chemical Reagent Co., Ltd.).

[0057] Table 1-c 70% Ba 0.6 Sr 0.4 TiO 3 +30%SrMoO 4 Proportion of ceramic dielectric materials

[0058] formula

mass (g)

BaCO 3

38.8

SrCO 3

37.3

TiO 2

26.2

MoO 3

17.4

[0059] Put the above-mentioned raw material powder in a nylon ball mill tank, add zirconia balls and absolute ethanol or deionized water, ball mill for ...

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Abstract

The invention belongs to the technical field of electronic material and device, and particularly discloses a microwave ceramic dielectric material of barium strontium titanate composite molybdate high in Q value and dielectrically adjustable, and preparation for the same. The chemical ingredients of the microwave ceramic dielectric material disclosed by the invention satisfy the following chemical formula: (1-x)%Ba<1-y>SryTiO3 + x%AMoO4, wherein A is selected from Ba, Sr, Ca, Mn, Mg, Zn and Co; x is not less than 0 and not greater than 100; and y ranges from 0.4 to 0.6. The adjustable microwave ceramic dielectric material disclosed by the invention has a high Q value, serialized dielectric constants and a certain dielectric adjustment rate, as well as can be used as a material for adjustable microwave components such as electrically-tuned microwave resonator, filter and microwave dielectric antenna.

Description

technical field [0001] The invention belongs to the technical field of electronic materials and devices, and specifically relates to a high-Q, dielectrically adjustable strontium barium titanate-based microwave ceramic dielectric material, which can be used for electrically tuned microwave resonators, filters and microwave media Materials for adjustable microwave components such as antennas. Background technique [0002] The ferroelectric material with perovskite structure strontium barium titanate with high dielectric constant, low dielectric loss, non-linear tunable dielectric constant and tunable Curie temperature is used as a microwave tunable device (such as phase shifter, filter devices, variable capacitors and delay lines, etc.) have received increasing attention, especially as a microwave phase shifter is a current research hotspot. However, the BST ceramic material with high dielectric constant is difficult to meet the requirements of internal impedance matching an...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/495C04B35/622
Inventor 翟继卫唐林江沈波
Owner TONGJI UNIV
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