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Dielectric adjustable BST-MB two-phase compound microwave ceramic material and method for preparing same

A microwave ceramic and dielectric technology is applied in the field of BST-MB two-phase composite microwave ceramic materials and its preparation, and achieves the effects of large changes, widened application scope and low sintering temperature

Inactive Publication Date: 2010-06-09
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 TiO 3 and Mg with excellent microwave dielectric properties 3 B 2 o 6 (ε r =7.0, Q.f=230900 f=11.8GHz) composite and its dielectric properties have not been reported yet

Method used

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  • Dielectric adjustable BST-MB two-phase compound microwave ceramic material and method for preparing same
  • Dielectric adjustable BST-MB two-phase compound microwave ceramic material and method for preparing same
  • Dielectric adjustable BST-MB two-phase compound microwave ceramic material and method for preparing same

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Experimental program
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Effect test

Embodiment 6

[0056] Embodiment 6 prepares Ba 0.3 Sr 0.7 TiO 3 -Mg 3 B 2 o 6 Two-phase composite microwave ceramic materials:

[0057] (1) According to Ba 0.3 Sr 0.7 TiO 3 The stoichiometric ratio, weighed 42.023g BaTiO 3 and 77.157 g SrTiO 3 Put the powder into a nylon ball mill jar, add zirconia balls (the mass ratio of the zirconia balls to the ball mill is 1.2:1) and absolute ethanol (the mass ratio of the absolute ethanol to the ball mill is 1.5:1), and ball mill for 24 Hours, pre-calcined at 1100°C for 4 hours after the discharge was dried, and Ba 0.3 Sr 0.7 TiO 3 The powder is ready for use.

[0058] (2) Weigh 30.225g MgO, 31.070g H 3 BO 3 and 0.932 g of excess H 3 BO 3 Put the powder into a nylon ball mill jar, add zirconia balls (the mass ratio of the zirconia balls to the ball mill is 1.2:1) and absolute ethanol (the mass ratio of the absolute ethanol to the ball mill is 1.5:1), and ball mill for 24 Hours, pre-calcined at 1150°C for 4 hours after the discharge wa...

Embodiment 7

[0061] Embodiment 7 prepares Ba 0.7 Sr 0.3 TiO 3 -Mg 3 B 2 o 6 Two-phase composite microwave ceramic materials:

[0062] (3) According to Ba 0.7 Sr 0.3 TiO 3 The stoichiometric ratio, weigh 98.054g BaTiO 3 and 33.067 g SrTiO 3 Put the powder into a nylon ball mill jar, add zirconia balls (the mass ratio of the zirconia balls to the ball mill is 1.5:1) and deionized water (the mass ratio of the deionized water to the ball mill is 3.0:1), and mill for 24 Hours, after the discharge is dried, it is pre-calcined at 1100°C for 2 hours, and Ba 0.7 Sr 0.3 TiO 3 The powder is ready for use.

[0063] (4) Weigh 30.225g MgO, 31.070g H 3 BO 3 and 0.932 g of excess H 3 BO 3 Put the powder in a nylon ball mill jar, add zirconia balls, add absolute ethanol or deionized water, ball mill for 24 hours, and pre-calcine at 1150°C for 4 hours after discharging the material, and get Mg after grinding 3 B 2 o 6 The powder is ready for use.

[0064] According to Ba 0.7 Sr 0.3 Ti...

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Abstract

The invention belongs to the technical field of electric materials and devices, in particular to a dielectric adjustable BST-MB two-phase compound microwave ceramic material and a method for preparing the same. The dielectric adjustable two-phase compound microwave ceramic material consists of BaxSr1-xTiO3 and Mg2B2O6. The dielectric adjustable BST-MB two-phase compound microwave ceramic material has the advantages of low sintering temperature and big change of a dielectric constant along with the change of external DC electric fields and is applicable to the two-phase compound microwave ceramic medium ferroelectric phase shifter material of a adjustable microwave device.

Description

technical field [0001] The invention belongs to the technical field of electronic materials and devices, and in particular relates to a dielectrically adjustable BST-MB two-phase composite microwave ceramic material and a preparation method thereof. Background technique [0002] Ba x Sr 1-x TiO 3 (Barium strontium titanate, BST) is BaTiO 3 and SrTiO 3 The infinite solid solution has excellent dielectric properties: easy adjustment of dielectric constant, low dielectric loss, excellent ferroelectricity, piezoelectricity, withstand voltage, insulation and adjustable performance, and can be widely used in small volume and large capacity Microcapacitors, ultra-large-scale dynamic random access memory, tuned microwave devices, ferroelectric phase shifters, etc. Barium strontium titanate is generally considered to be the most promising ferroelectric phase-shifting material, and it has received increasing attention as microwave tunable devices (such as phase shifters, filters,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/01C04B35/622
Inventor 张奇伟
Owner TONGJI UNIV
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