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Ba(1-x)SrxTiO3-BaX6Ti6O19(X=Mg, Zn) diphasic composite micro-wave ceramic material and preparation method thereof

A srxtio3-bax6ti6o19, bax6ti6o19 technology is applied in the field of two-phase composite microwave ceramic materials to achieve the effects of moderate dielectric constant, no toxic side effects, and high dielectric tunable characteristics

Inactive Publication Date: 2008-02-06
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, using BaX 6 Ti 6 o 19 (X=Mg, Zn) such low dielectric microwave materials and high dielectric Ba (1-x) Sr x TiO 3 Organic compounding of ferroelectric materials, aiming at obtaining composite microwave ceramic materials with moderate dielectric constant and serialization, and high dielectric tunable properties, has not been reported yet.

Method used

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  • Ba(1-x)SrxTiO3-BaX6Ti6O19(X=Mg, Zn) diphasic composite micro-wave ceramic material and preparation method thereof
  • Ba(1-x)SrxTiO3-BaX6Ti6O19(X=Mg, Zn) diphasic composite micro-wave ceramic material and preparation method thereof
  • Ba(1-x)SrxTiO3-BaX6Ti6O19(X=Mg, Zn) diphasic composite micro-wave ceramic material and preparation method thereof

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preparation example Construction

[0031] The preparation method of the two-phase composite microwave ceramic material provided by the present invention specifically comprises the following steps:

[0032] (1) Using the traditional electronic ceramic powder preparation process, through the solid-state reaction method, select BaTiO 3 and SrTiO 3 (99.9%, 100nm, provided by Shandong Guoteng Functional Ceramic Material Co., Ltd.) as the main raw material, according to a certain Ba / Sr molar ratio ingredients, the prepared raw materials are placed in a nylon ball mill jar, and zirconia balls and absolute ethanol or Ball mill with deionized water for 20 to 24 hours, pre-calcine at 1100°C for 4 hours after the discharge is dried, and Ba (1-x) Sr x TiO 3 (x=0.3~0.6) powder.

[0033] (2) adopt solid phase reaction method, synthesize Ba according to following reaction equation (1-x) Sr x TiO 3 -BaX 6 Ti 6 o 19 (X=Mg, Zn) powder:

[0034] BaTiO 3 +5TiO 2 +6MgO=BaMg 6 Ti 6 o 19

[0035] BaTiO 3 +5TiO 2 +6...

Embodiment 1～5

[0043] Preparation of Ba (1-x) Sr x TiO 3 -BaX 6 Ti 6 o 19 (x=0.50, 0.45, 0.40; X=Mg, Zn) two-phase composite microwave ceramic material:

[0044] According to Ba 0.5 Sr 0.5 TiO 3 、Ba 0.55 Sr 0.45 TiO 3 and Ba 0.6 Sr 0.4 TiO 3 The stoichiometric ratio, respectively weighed 46.6454gBaTiO 3 and 36.7034 g SrTiO 3 , 51.3099g BaTiO 3 and 33.0331 g SrTiO 3 , 55.9744g BaTiO 3 and 29.3627gSrTiO 3 Put the powder in a nylon ball mill jar, add zirconia balls and absolute ethanol, mill for 24 hours, and pre-calcine at 1100°C for 4 hours after the discharge is dried, and Ba 0.5 Sr 0.5 TiO 3 、Ba 0.55 Sr 0.45 TiO 3 and Ba 0.6 Sr 0.4 TiO 3 The powder is ready for use. In addition, weigh 16.3422g BaTiO 3 , 27.9930g TiO 2 , 16.9429g MgO and 16.3422g BaTiO 3 , 27.9930gTiO 2 , 34.2222g ZnO powder was placed in a nylon ball mill tank, zirconia balls and deionized water were added, ball milled for 24 hours, after the discharge was dried, it was pre-calcined at 1250°C...

Embodiment 1

[0050] Example 1 # -5 # Ba obtained from the formula (1-x) Sr x TiO 3 -BaX 6 Ti6 o 19 (x=0.50,0.45,0.40; X=Mg, Zn) the X-ray diffraction analysis collection of materials of composite microwave ceramic material is as shown in accompanying drawing 1;

[0051] Example 1 # -5 # Ba obtained from the formula (1-x) Sr x TiO 3 -BaX 6 Ti 6 o 19 (x=0.50,0.45,0.40; X=Mg, Zn) the relational curve of dielectric constant and loss and temperature of composite microwave ceramic material is as shown in accompanying drawing 2;

[0052] Example 1 # -5 # Ba obtained from the formula (1-x) Sr x TiO 3 -BaX 6 Ti 6 o 19 (x-0.50, 0.45, 0.40; X=Mg, Zn) the dielectric constant of the composite microwave ceramic material and the relationship curve of the applied DC field strength are as shown in accompanying drawing 3, wherein, 1 # 40wt% Ba 0.5 Sr 0.5 TiO 3 with 60wt% BaMg 6 Ti 6 o 19 Composite; 2 # 40wt% Ba 0.55 Sr 0.45 TiO 3 with 60wt% BaMg 6 Ti 6 o 19 Composite; 3 #...

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Abstract

The invention relates to the two-phase composite microwave ceramics material technical field with controllable permittivity with the seriation of composition components and the high adjustability in imposed DC electric field. The Ba(1-x)SrxTiO3-BaX6Ti6O19(X=Mg, Zn) two-phased composite microwave ceramics material of the invention comprises: Ba (1-x)SrxTiO3(x=0.3-0.6) 80.0wt percent to 20.0wt percent and BaX6Ti6O19 20.0wt percent to 80.0wt percent. Adopting traditional electronic ceramics preparation process, the invention selects a low dielectric microwave dielectric material BaX6Ti6O19(X=Mg, Zn) with a high dielectric property and a barium strontium titanate ferroelectric materials of a different Ba / Sr components to be in two-phase gradient composite. The composite material produced has an appropriate permittivity, an electric adjustable property and is applicable to adjustable microwave elements and electric adjustable medium function modules.

Description

technical field [0001] The invention relates to the technical field of a two-phase composite microwave ceramic material whose dielectric constant is controllable with serialization of composite components and has high adjustable characteristics under the action of an external DC electric field. Background technique [0002] The rapid development of the electronic components industry has put forward new and higher requirements for the research of information functional ceramic materials. The dielectric materials used from L-band to S-band (1-4GHz) require low dielectric constant, low loss and appropriate electrical reliability. tuning characteristics. As a new type of functional electronic components, passive tunable microwave devices are urgently needed in the field of modern information industry. Using the electrical nonlinearity of ferroelectric materials is one of the important technical ways to realize passive tunable microwave devices. BaTiO 3 The base ferroelectric m...

Claims

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Application Information

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IPC IPC(8): C04B35/462C04B35/465C04B35/622H01B3/12
Inventor 翟继卫丑修建
Owner TONGJI UNIV
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