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Low-temperature sintered microwave dielectric material and preparation method thereof

A microwave dielectric material and low-temperature sintering technology are applied in the field of low-temperature sintering microwave dielectric materials and their preparation, the composition of low-temperature sintering microwave dielectric materials and their preparation fields, and can solve the problems of unsatisfactory stability, chemical reaction raw materials, special sintering process, etc. Achieve the effect of adjustable dielectric constant, simple preparation process and low cost

Active Publication Date: 2021-11-19
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although most of the new LTCC dielectric material systems in the above research reports exhibit excellent dielectric properties and sintering characteristics, these material systems still have problems such as complex components, unsatisfactory stability, special and sensitive sintering processes, and some systems are still There are problems such as chemical reaction with silver and toxicity of raw materials

Method used

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  • Low-temperature sintered microwave dielectric material and preparation method thereof
  • Low-temperature sintered microwave dielectric material and preparation method thereof
  • Low-temperature sintered microwave dielectric material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Select M=Zn, u=1, v=2, w=4, x=90wt%, y=10wt%, a=4(44.4%), b=1(11.2%), c=4(44.4%) . The composition of LTCC dielectric material can be expressed as 90wt% ZnAl 2 o 4 +10wt% (4CuO-TiO 2 -4NbO 2.5 ). Start with Al 2 o 3 Powder and ZnO powder are used as raw materials, mixed by ball milling at a molar ratio of 1:1, and the dried mixture is sintered at 1150°C for 4 hours to obtain the matrix material ZnAl 2 o 4 Powder. ZnAl 2 o 4 Powder, CuO powder, TiO 2 Powder and Nb 2 o 5 The powder is used as the raw material, and the ingredients are mixed according to the above ratio and put into a nylon ball mill jar, adding absolute ethanol and balls, and ball milling for 12 hours to make the raw materials evenly mixed. Dry the mixed raw materials and perform molding treatment to obtain a cylindrical green body, which is sintered at 950° C. for 4 hours to obtain a sintered dense ceramic sample. X-ray diffraction (XRD) analysis shows that the phase composition of ceramics...

Embodiment 2

[0046] Select M=Zn, u=1, v=2, w=4, x=95wt%, y=5wt%, a=4(44.4%), b=1(11.2%), c=4(44.4%) . The composition of LTCC dielectric material can be expressed as 95wt% ZnAl 2 o 4 +5wt% (4CuO-TiO 2 -4NbO 2.5 ). Start with Al 2 o 3 Powder and ZnO powder are used as raw materials, mixed by ball milling at a molar ratio of 1:1, and the dried mixture is sintered at 1150°C for 4 hours to obtain the matrix material ZnAl 2 o 4 Powder. ZnAl 2 o 4 Powder, CuO powder, TiO 2 Powder and Nb2O 5 The powder is used as the raw material, and the ingredients are mixed according to the above ratio and put into a nylon ball mill jar, adding absolute ethanol and balls, and ball milling for 12 hours to make the raw materials evenly mixed. Dry the mixed raw materials and perform molding treatment to obtain a cylindrical green body, which is sintered at 1050° C. for 4 hours to obtain a sintered dense ceramic sample. X-ray diffraction (XRD) analysis shows that the phase composition of ceramics is ...

Embodiment 3

[0048] Choose M=Zn, u=1, v=2, w=4, x=95wt%, y=5wt%, a=1(50%), b=0, c=1(50%). The composition of LTCC dielectric material can be expressed as 95wt% ZnAl 2 o 4 +5wt% (CuO-NbO 2.5 ). Start with Al 2 o 3 Powder and ZnO powder are used as raw materials, mixed by ball milling at a molar ratio of 1:1, and the dried mixture is sintered at 1150°C for 4 hours to obtain the matrix material ZnAl 2 o 4 Powder. ZnAl 2 o 4 powder, CuO powder and Nb 2 o 5 The powder is used as the raw material, and the ingredients are mixed according to the above ratio and put into a nylon ball mill jar, adding absolute ethanol and balls, and ball milling for 12 hours to make the raw materials evenly mixed. Dry the mixed raw materials and perform molding treatment to obtain a cylindrical green body, which is sintered at 975° C. for 4 hours to obtain a sintered dense ceramic sample. X-ray diffraction (XRD) analysis shows that the phase composition of ceramics is mainly ZnAl 2 o 4 , XRD pattern se...

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Abstract

The invention relates to a low-temperature sintered microwave dielectric material and a preparation method thereof. The chemical composition of the low-temperature sintered microwave dielectric material is xM[u]Al[v]O[w]+y(aCuO-bTiO[2]-cNbO[2.5]), wherein M is at least one of Mg, Zn, Ca and Ba, 1<=u<=2, 1<=v<=2, and 4<=w<=5; x and y are mass percentages, 1 wt%<=y<=10 wt%, and x+y=100 wt%; and a, b and c are mole percentage contents, 0<=a<=100%, 0<=b<=100%, 0<=c<=100%, and a+b+c=100%.

Description

technical field [0001] The invention relates to a low-temperature sintered microwave dielectric material composition and its preparation method, in particular to a low-temperature sintered microwave dielectric material with high quality factor and adjustable dielectric constant prepared by grain boundary activation sintering and its preparation method, belonging to functional ceramics material field. Background technique [0002] Low temperature cofired ceramics (Low Temperature Cofired Ceramics, LTCC) refers to the ability to co-fire with Au, Ag, Cu and other metal or alloy electrode materials with excellent electrical conductivity at lower temperatures (<950 ° C) to obtain functional components or Ceramic materials for packaging substrates. [0003] With the rapid development of electronic information technology, the demand for new high-performance LTCC materials that can meet differentiated application scenarios is becoming more and more urgent. For example, 5G and f...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/622
CPCC04B35/10C04B35/622C04B2235/3284C04B2235/3232C04B2235/3281C04B2235/3251C04B2235/6567C04B2235/9607C04B2235/96
Inventor 刘志甫杨燕马名生
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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