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Ba(1-x)Sr(x)TiO3-Zn2TiO4 diphasic composite ceramic material preparation method thereof

A technology of ceramics and composite powders, which is applied in the direction of ceramics and inorganic insulators to achieve the effects of moderate dielectric constant, broadened application range, and high dielectric adjustable characteristics

Inactive Publication Date: 2009-08-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high temperature stable phase Zn using zinc titanate salt 2 TiO 4 This low dielectric material and high dielectric Ba (1-x) Sr x TiO 3 Organic compounding of ferroelectric materials, aimed at obtaining composite ceramic materials with moderate and serialized dielectric constants, high dielectric tunability, and sintering at relatively low temperatures (≤1200°C) has not been reported yet.

Method used

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  • Ba(1-x)Sr(x)TiO3-Zn2TiO4 diphasic composite ceramic material preparation method thereof
  • Ba(1-x)Sr(x)TiO3-Zn2TiO4 diphasic composite ceramic material preparation method thereof
  • Ba(1-x)Sr(x)TiO3-Zn2TiO4 diphasic composite ceramic material preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0033] Preparation of Ba (1-x) Sr x TiO 3 -Zn 2 TiO 4 (x=0.50, 0.45, 0.40) two-phase composite microwave ceramic material:

[0034] 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 32.560g ZnO and 15.980gTiO 2 Put the powder in a nylon ball mill jar, add zirconia balls and deionized water, mill for 24 hours, and pre-calcine at 1100°C for 4 hours after the discharge is dried. After grinding, Zn 2 TiO 4 The powder is ready for use.

[0035] Take by weighing the above-mentio...

Embodiment 1

[0042] Example 1 # -6 # Ba obtained from the formula (1-x) Sr x TiO 3 -Zn 2 TiO 4 (x=0.50,0.45,0.40) The X-ray diffraction analysis collection of composite microwave ceramic material is as attached figure 1 shown.

[0043] Example 1 # -6 # Ba obtained from the formula (1-x) Sr x TiO 3 -Zn 2 TiO 4 (x=0.50, 0.45, 0.40) The relationship curves of the dielectric constant and loss of the composite microwave ceramic material with temperature are as attached figure 2 shown.

[0044] Example 1 # -6 # Ba obtained from the formula (1-x) Sr x TiO 3 -Zn 2 TiO 4 (x=0.50, 0.45, 0.40) The relationship curve between the dielectric constant of the composite microwave ceramic material and the applied DC field strength is as attached image 3 As shown, among them, 1 # 20wt% Ba 0.5 Sr 0.5 TiO 3 with 80wt% Zn 2 TiO 4 Composite; 2 # 30wt% Ba 0.5 Sr 0.5 TiO 3 with 70wt% Zn 2 TiO 4 Composite; 3 # 40wt% Ba 0.55 Sr 0.45 TiO 3 Composite with 60wt%; 4 # 50wt% Ba 0...

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Abstract

This invention relates to a dielectric adjustable and two-phase composite ceramic material. It is of two-phase composite micro-wave ceramic material, with its representation of: Ba(1-x)SrxTiO3-Zn2TiO4, the components are: Ba(1-x)SrxTiO3(x=0.3-0.6)80.0wt%-20.0wt%,Zn2TiO4 20.0wt%-80.0wt%. The system curie temperature can be regulated widely by the ratio of Ba / Sr. According working temperature requirements of the designed adjustable micro-wave device, we can regulate the system structure and properties of the material. This inventive product is suitable for design and development of adjustable micro-wave device and electrically adjustable medium functional module, and suitable for design and development of low-temperature co-sintered ceramic device and multiple-layered functional device.

Description

technical field [0001] The invention relates to the technical field of a two-phase composite ceramic material whose dielectric constant is controllable with serialization of composite components and has highly adjustable characteristics under the action of an external DC electric field. Background technique [0002] Composite ceramics with dielectric tunability and low-temperature sintering characteristics are key materials for tunable microwave components such as electrically tunable microwave resonators, filters, and microwave dielectric antennas. They have important application values ​​and can be widely used in mobile communications and satellite positioning. Systems (GPS), automotive electronics, radar, and military guidance systems are highly valued by researchers and industries. 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 ferro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/462C04B35/468C04B35/47H01B3/12
Inventor 翟继卫丑修建王思维
Owner TONGJI UNIV
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