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Super material harmonic oscillator and preparation method thereof

A harmonic oscillator and metamaterial technology, applied in the field of filters, can solve problems such as difficult to master and high loss, and achieve the effect of thin glass coating, lower sintering temperature, and avoid loss

Active Publication Date: 2014-12-10
KUANG CHI INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the LTCC process is difficult to master, and there are many technical problems
For example, sintering in unpressurized air leads to delamination and warping; in order to protect the lower sintering temperature (< melting point of Ag-Pd alloy), some low-melting sintering aids must be added, and too much sintering aids lead to high loss

Method used

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  • Super material harmonic oscillator and preparation method thereof

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preparation example Construction

[0020] A preparation method of a metamaterial harmonic oscillator, the preparation method comprising the following steps: as figure 1 shown

[0021] a. Prepare ceramic powder with a sintering temperature lower than 950°C to make a ceramic slurry, and then cast it into a green ceramic belt with a thickness of 20 μm to 200 μm, and process multiple metal microstructures on the green ceramic belt that requires a metal microstructure , and then according to the actual design requirements, the green ceramic tape without metal microstructure and the green ceramic tape with metal microstructure are laminated into a whole and glued side by side to make pre-fired LTCC ceramic sheets;

[0022] b, the glass powder (such as P 2 o 5 -ZnO-Al 2 o 3 -SiO 2 -MgO-CaO system, Bi 2 o 5 -B 2 o 3 -ZnO-Al 2 o 3 -SiO 2 system, etc.), the oxide precursors (corresponding carbonates, hydroxyl salts or metal organic compounds, etc.) of each oxide component in the oxide components are mixed uni...

Embodiment 1

[0029] ZnNb 2 o 6 The ceramic powder of the system is prepared into a ceramic slurry, and 0.5wt% of a sintering aid is added to it, and then cast to form a green ceramic tape with a thickness of 20 μm, and a 350-mesh screen printing is used on the green ceramic tape that requires a metal microstructure A plurality of metal microstructures, the green ceramic strips without metal microstructures and the green ceramic strips containing metal microstructures are placed alternately to form a whole, and glued side by side to make pre-fired LTCC ceramic sheets;

[0030] Will P 2 o 5 -ZnO-Al 2 o 3 -SiO 2 The oxide precursors (corresponding carbonates, hydroxyl salts or metal organic compounds, etc.) of each oxide component in the glass powder of the MgO-CaO system are mixed uniformly to form a sol, and the ceramic auxiliary sheet with a thickness of 2 mm is immersed in the After the above sol is taken out, then the gel is allowed to stand and dried to obtain a pre-fired ceramic ...

Embodiment 2

[0035] Will BaTi 4 o 9 The ceramic powder of the system was prepared into a ceramic slurry, and 1wt% of a sintering aid was added to it, and then flow-cast to form a green ceramic tape with a thickness of 100 μm, and a 370-mesh screen printing was used on the green ceramic tape that required a metal microstructure. A metal microstructure, the green ceramic strips without metal microstructure and the green ceramic strips containing metal microstructure are alternately laminated into a whole, and glued side by side to make pre-fired LTCC ceramic sheets;

[0036] Will P 2 o 5 -ZnO-Al 2 o 3 -SiO 2 The oxide precursors (corresponding carbonates, hydroxyl salts or metal organic compounds, etc.) of each oxide component in the glass powder of the MgO-CaO system are mixed uniformly to form a sol, and the ceramic auxiliary sheet with a thickness of 3 mm is passed through a rotary The method of coating is to apply a layer of sol, then let it stand and dry to make a pre-fired cerami...

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Abstract

The invention provides a super material harmonic oscillator and a preparation method thereof. The preparation method includes that ceramic powder with sintering temperature lower than 950 DEG C, is prepared into ceramic slurry, the ceramic slurry is made into a green ceramic tape in curtain coating mode, a plurality of metal microstructures are arranged on the green ceramic tape requiring the metal microstructures, and the green ceramic tape is folded and pressed into a whole body which is made into pre-burning low temperature co-fired ceramic (LTCC) sheets; oxide precursors of oxide components in glass powder are mixed evenly to form sol, a ceramic auxiliary sheet is soaked in the sol and then taken out, or a layer of sol is coated on the ceramic auxiliary sheet through spin coating mode, and the ceramic auxiliary sheet is stood for sol coagulation and dried to obtain a pre-burning ceramic auxiliary sheet; and the pre-burning LTCC ceramic sheet and the pre-burning ceramic auxiliary sheet are overlapped and sintered under the loading condition to obtain the super material harmonic oscillator. Zero contraction of the LTCC ceramic sheet on an XY plane is achieved by using the ceramic auxiliary sheet, and simultaneously quick-firing (Qf) is improved. A glass coating prepared by adopting a sol-gel method is low in loss, reduces whole sintering temperature, and avoids the defect of enlargement of super material harmonic oscillator loss because a large amount of sintering agents are added in the LTCC ceramic sheet.

Description

【Technical field】 [0001] The invention relates to the field of filters, in particular to a metamaterial harmonic oscillator and a preparation method thereof. 【Background technique】 [0002] Metamaterials are materials that can modulate electromagnetic waves developed in the past ten years. Metamaterials are generally composed of a certain number of metal microstructures attached to a substrate with certain mechanics and electromagnetism. These microstructures with specific patterns and materials can modulate electromagnetic waves of specific frequency bands passing through them. [0003] Metamaterial resonators refer to microwave ceramic resonators containing metal microstructures, which are used to make small-volume high-performance filters. Metamaterial resonators generally use a low-temperature co-firing process, that is, sintering under pressure-free conditions. However, the LTCC process is difficult to master, and there are many technical difficulties. For example, s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/622B32B18/00C04B35/495C04B35/468C04B35/465C03C8/24H01P7/10
Inventor 刘若鹏徐冠雄缪锡根
Owner KUANG CHI INST OF ADVANCED TECH
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