Medium low-loss LTCC microwave dielectric ceramic material and preparation method thereof

A technology of microwave dielectric ceramics and ceramic materials, applied in sustainable manufacturing/processing, chemical industry, climate sustainability, etc., can solve problems such as the difference in temperature coefficient of resonance frequency, achieve the effect of improving Qf value and good application prospects

Active Publication Date: 2020-12-25
YANCHUANG PHOTOELECTRIC TECH GANZHOU
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Problems solved by technology

[0005] Overall, ZnZrNb with a monoclinic wolframite structure with intermediate features 2 o 8 Although ceramics have low dielectric loss, their sintering temperature is too high, generally above 1150°C, followed by poor temperature coefficient of resonant frequency, all around -50ppm / °C

Method used

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  • Medium low-loss LTCC microwave dielectric ceramic material and preparation method thereof
  • Medium low-loss LTCC microwave dielectric ceramic material and preparation method thereof
  • Medium low-loss LTCC microwave dielectric ceramic material and preparation method thereof

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Embodiment 1-9

[0023] The intermediate low-loss LTCC microwave dielectric ceramic material provided by the present embodiment 1-9 includes a two-phase mixed ceramic material, wherein the main crystal phase is ZnZr of a monoclinic wolframite structure (1-x) Ti x Nb 2 o 8 , x=0.1~0.2, the auxiliary phase is Li with monoclinic structure 2 TiO 3 , ZnZr (1-x) Ti x Nb 2 o 8 Pre-fired material and Li 2 TiO 3 The pre-fired material is mixed according to the weight percentage of 63-67wt%: 37-33wt%, and then mixed with 1.5-2.5wt% LMBBA glass accounting for the two-phase mixed ceramic material as a flux for sintering, and the sintering temperature is 900°C; the composition of the LMBBA glass is Li 2 CO 3 -MgO-Bi 2 o 3 -B 2 o 3 -Al 2 o 3 .

[0024] in,

[0025] The ZnZr (1-x) Ti x Nb 2 o 8 The calcined material included oxides in the following molar ratios:

[0026] ZnO: ZrO 2 : TiO 2 : Nb 2 o 5 =1:0.8:0.2:1.

[0027] The Li 2 TiO 3 The calcined material comprises raw mate...

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Abstract

The invention provides a medium low-loss LTCC microwave dielectric ceramic material and a preparation method thereof.The LTCC microwave dielectric ceramic material comprises a two-phase mixed ceramicmaterial, the main crystalline phase is ZnZr(1-x)TixNb2O8 of a monoclinic wolframite structure, x is 0.1-0.2, the auxiliary phase is Li2TiO3 of a monoclinic system structure, a ZnZr(1-x)TixNb2O8 pre-sintered material and a Li2TiO3 pre-sintered material are mixed according to a the weight percentage ratio of (63-67 wt%): (37-33 wt%), and then LMBBA glass accounting for 1.5-2.5 wt% of the two-phasemixed ceramic material is doped as a cosolvent and is sintered at 900 DEG C; and the component of the LMBBA glass is Li2CO3-MgO-Bi2O3-B2O3-Al2O3. The LTCC microwave dielectric ceramic material disclosed by the invention not only has a relatively high dielectric constant and very low microwave dielectric loss, but also has a temperature coefficient close to zero, and has a very high application value in LTCC radio frequency microwave devices.

Description

【Technical field】 [0001] The invention relates to the field of electronic functional ceramic materials and the manufacture thereof, in particular to an intermediate low-loss LTCC microwave dielectric ceramic material and a preparation method thereof. 【Background technique】 [0002] In recent years, whether it is general-purpose electronic machines, communication equipment or consumer electronic products in the world, they are rapidly developing in the direction of miniaturization, light weight, integration, multi-function and high reliability. The microelectronics technology based on the integration of active devices has been developed relatively well, and once became the main technology for the miniaturization of electronic devices. However, with the development requirements of further miniaturization and light weight of the electronic whole system, the integration of a single active device is far from meeting the needs of production and application, and the miniaturization...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622C04B35/64
CPCC04B35/495C04B35/622C04B35/64C04B2235/3249C04B2235/3251C04B2235/3234C04B2235/3203C04B2235/36C04B2235/96Y02P20/10
Inventor 肖明
Owner YANCHUANG PHOTOELECTRIC TECH GANZHOU
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