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Low-loss high-dielectric adjustable titanic acid strontium barium substrate ceramic material and preparation method thereof

A barium strontium titanate and dielectric technology, which is applied in the field of electronic materials and devices, can solve the problems of no patents and undiscovered BST dielectric properties, and achieve the effects of low cost, no toxic side effects, and excellent performance

Inactive Publication Date: 2013-10-30
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After literature search, so far, no relevant reports on the use of Fe powder to dope BST and its dielectric properties have been found, and there is no patent similar to the present invention.

Method used

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  • Low-loss high-dielectric adjustable titanic acid strontium barium substrate ceramic material and preparation method thereof
  • Low-loss high-dielectric adjustable titanic acid strontium barium substrate ceramic material and preparation method thereof
  • Low-loss high-dielectric adjustable titanic acid strontium barium substrate ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Strontium barium titanate-based microwave ceramic material with tunable dielectric (1-y)Ba 0.4 Sr 0.6 TiO 3 - the preparation of yFe, wherein (1-y) Ba 0.4 Sr 0.6 TiO 3 The composition ratio of -yFe material is shown in Table 1.

[0044] Its preparation method specifically comprises the following steps:

[0045] (1) According to Ba 0.4 Sr 0.6 TiO 3 The stoichiometric ratio, weigh 28.015g BaTiO 3 and 33.066 g SrTiO 3 The powder is placed in a nylon ball mill jar, and zirconia balls and absolute ethanol or deionized water are added, and ball milled for 24 hours (during ball milling, the mass ratio of the added zirconia balls to the ball grinding material is 1.5:1; the added absolute ethanol Or the mass ratio of deionized water to ball milling material is 3.0:1), after discharging and drying, pre-calcine at 1200°C for 4 hours, and obtain Ba 0.4 Sr 0.6 TiO 3 The powder is ready for use.

[0046] Take the above-mentioned synthesized Ba respectively according to ...

Embodiment 2

[0054] Strontium barium titanate-based microwave ceramic material with tunable dielectric (1-y)Ba 0.4 Sr 0.6 TiO 3 - the preparation of yFe, wherein (1-y) Ba 0.4 Sr 0.6 TiO 3 The compositional distribution of -yFe material is shown in Table 3.

[0055] Its preparation method specifically comprises the following steps:

[0056] (1) According to Ba 0.4 Sr 0.6 TiO 3 The stoichiometric ratio, weigh 28.015g BaTiO 3 and 33.066 g SrTiO 3 The powder is placed in a nylon ball mill jar, and zirconia balls and absolute ethanol or deionized water are added, and ball milled for 20 hours (during ball milling, the mass ratio of the added zirconia balls to the ball grinding material is 1.2:1; the added absolute ethanol Or the mass ratio of deionized water to ball milling material is 1.5:1), after discharging and drying, it is pre-fired at 1100°C for 4 hours, and after grinding, Ba 0.4 Sr 0.6 TiO 3 The powder is ready for use.

[0057] Take the above-mentioned synthesized Ba resp...

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Abstract

The utility model belongs to the technical field of electronic materials devices and in particular relates to a low-loss high-dielectric adjustable titanic acid strontium barium substrate ceramic material and a preparation method thereof. The dielectric adjustable titanic acid strontium barium substrate ceramic material is in a single phase cube perovskite structure. The material comprises ingredients with following mass percentage of BaxSr1 to xTiO3 (x = 0.3 to 0.8) of 50 wt. % to 99.9 wt. % and ferrum (Fe) powder of 0.1 wt. % to 50 wt. %. The ferrum powder is added into the titanic acid strontium barium substrate ceramic material of different Ba / Sr ingredients. Thus, the low-loss high-dielectric adjustable titanic acid strontium barium substrate ceramic material is developed and obtained, and the ceramic material can be applied to adjustable parts and especially suitable for materials of microwave medium ceramic ferroelectric phase shifting devices of adjustable microwave parts.

Description

technical field [0001] The invention belongs to the technical field of electronic materials and devices, and relates to a low-loss, high-dielectric adjustable barium strontium titanate ceramic material and a preparation method thereof, in particular to a low-loss, dielectric constant that varies greatly with an applied DC electric field, Microwave dielectric ceramic ferroelectric phase shifter materials suitable for tunable microwave devices. Background technique [0002] Ba x Sr 1-x TiO 3 (BST) is BaTiO 3 and SrTiO 3 The infinite solid solution has potential application value in adjustable devices, such as: microcapacitors with small volume and large capacity, 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, variable capacitors, and delay lines...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/00C22C1/05
Inventor 翟继卫张奇伟
Owner TONGJI UNIV
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