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Dielectric adjustable microwave medium material and preparing process thereof

A microwave dielectric material and dielectric technology, applied in the direction of inorganic insulators, ceramics, etc., can solve the problem that it is difficult to meet the requirements of spatial impedance matching for high-power devices, cannot meet the design requirements of adjustable microwave devices, and is difficult to realize the miniaturization of microwave devices Requirements and other issues, to achieve the effect of non-toxic side effects, low cost, high dielectric adjustable characteristics

Inactive Publication Date: 2009-08-05
TONGJI UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, pure BaTi0 3 The base ferroelectric material system often has a high dielectric constant (ε r >2000), in the application of tunable microwave devices, it is difficult to meet the requirements of spatial impedance matching and high-power device use
For conventional microwave dielectric materials, such as Bi 2 o 3 -ZnO-Nb 2 o 5 , Bi 2 o 3 -ZnO-Ta 2 o 5 , BaZn 1 / 3 Ta 2 / 3 o 3 , BaMg 1 / 3 Ta 2 / 3 o 3 Although the material system has a high Q value and excellent microwave dielectric properties, its functional characteristics are relatively single, generally do not have dielectric tunable properties, and cannot meet the design requirements of tunable microwave devices. In addition, its The dielectric constant is also relatively small, and it is difficult to meet the requirements of miniaturization of microwave devices

Method used

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  • Dielectric adjustable microwave medium material and preparing process thereof
  • Dielectric adjustable microwave medium material and preparing process thereof
  • Dielectric adjustable microwave medium material and preparing process thereof

Examples

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preparation example Construction

[0029] The preparation method of the microwave dielectric material provided by the present invention specifically includes the following steps:

[0030] (1) Using the traditional electronic ceramic powder preparation process, through the solid-phase reaction method, BaM is synthesized according to the following reaction equation 1 / 3 Ta 2 / 3 O 3 Powder, M is Mg or Zn:

[0031] 3BaCO 3 +Ta 2 O 5 +MgO=3BaMg 1 / 3 Ta 2 / 3 O 3 +3CO 2 ↑

[0032] 3BaCO 3 +Ta 2 O 5 +ZnO=3BaZn 1 / 3 Ta 2 / 3 O 3 +3CO 2 ↑

[0033] First, weigh out MgO (99.9%) or ZnO (99.9%) and BaCO according to the above molar ratio. 3 , Ta 2 O 5 (99.9%) powder, the mixed material is placed in a nylon ball mill tank, zirconia balls and absolute ethanol or deionized water are added, ball milled for 20 to 24 hours, and the material is dried and pre-fired at 1200°C to 1300°C 4 ~8 hours, BaM is obtained after grinding 1 / 3 Ta 2 / 3 O 3 Powder, M is Mg or Zn.

[0034] (2) According to Ba 1-x Sr x (M 1 / 3 Ta 2 / 3 ) y Ti 1-y O 3 , M is Mg or ...

Embodiment 1～8

[0037] Examples 1-8 , Preparation of dielectric tunable microwave dielectric material Ba 1-x Sr x (M 1 / 3 Ta 2 / 3 ) y Ti 1-y O 3 , M is Mg or Zn, x=0~0.4y=0.03~0.25.

[0038] First, weigh 59.3801g BaCO 3 , 44.2242g Ta 2 O 5 , 4.0340g MgO and 59.3801gBaCO 3 , 44.2242g Ta 2 O 5 , 8.1481g ZnO powder is placed in a nylon ball milling tank, added with zirconia balls and deionized water, ball milled for 24 hours, discharged and dried and pre-fired at 1300°C for 4 hours. After grinding, BaMg is obtained. 1 / 3 Ta 2 / 3 O 3 And BaZn 1 / 3 Ta 2 / 3 O 3 The powder is ready for use.

[0039] Then, weigh the BaTiO according to the composition ratio in the formula in Table 1. 3 , SrTiO 3 , BaMg 1 / 3 Ta 2 / 3 O 3 And BaZn 1 / 3 Ta 2 / 3 O 3 Powder:

[0040] Table 1

[0041] Example BaTiO 3 SrTiO 3 BaMg 1 / 3 Ta 2 / 3 O 3 BaZn 1 / 3 Ta 2 / 3 O 3 1 # (M=Mg, x=0, y=0.076) 18.000g -- 2.000g -- 2 # (M=Mg, x=0, y=0.116)

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Abstract

The invention discloses a dielectrically adjustable microwave dielectric material, the chemical composition of which is: Ba1-xSrx(M1 / 3Ta2 / 3)yTi1-yO3, M is Mg or Zn, x=0-0.4 y=0.03-0.25. The invention also discloses a method for preparing the dielectrically adjustable microwave dielectric material. The dielectrically adjustable microwave dielectric material in the present invention has high dielectric adjustability, low dielectric loss (high Q value) and suitable dielectric constant at the same time, and can be used as a passive adjustable microwave device and dielectric function Key material for module design and development.

Description

Technical field [0001] The invention relates to a kind of microwave dielectric material with adjustable dielectric constant under the action of an external DC electric field, which is suitable for the application and development of adjustable microwave devices and electrical tuning function modules, and belongs to the field of electronic functional materials. Background technique [0002] The rapid development of information technology urgently requires high-speed data and high current density transmission, and electronic circuits are increasingly developing in the direction of miniaturization, integration and high frequency, which puts forward new and higher requirements for information functional materials. The research of new microwave dielectric materials conforms to the mainstream development trend of miniaturization, multi-function and modularization of modern electronic components. Passive tunable microwave devices, as a new type of functional electronic components, are ur...

Claims

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Application Information

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