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A kind of low temperature co-fired ceramic dielectric material and preparation method thereof

A technology of dielectric material and total mass, applied in the field of LTCC dielectric material with adjustable dielectric constant and its preparation, low temperature co-fired ceramic dielectric material and its preparation, can solve the problem of reducing the sintering temperature of LTCC dielectric material, and achieve large Practical value, adjustable dielectric constant, comprehensive material properties and sintering characteristics are easy to control

Active Publication Date: 2022-05-27
ZHEJIANG SIRAMIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defect of reducing the sintering temperature of the LTCC dielectric material by introducing a large amount of low-melting glass phase in the existing LTCC material, the purpose of the present invention is to provide a low-temperature co-fired ceramic dielectric material without glass addition and its preparation method

Method used

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  • A kind of low temperature co-fired ceramic dielectric material and preparation method thereof
  • A kind of low temperature co-fired ceramic dielectric material and preparation method thereof
  • A kind of low temperature co-fired ceramic dielectric material and preparation method thereof

Examples

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Embodiment 1

[0039] M=Al, A=Cu, B=Nb, x=90wt%, y=10wt%, a=45wt%, b=55wt%, then the LTCC dielectric material xMO m +y(aAO n -bBO t ) can be expressed as 90wt% Al 2 O 3 -10wt%(45wt%CuO-55wt%Nb 2 O 5 ), referred to as CN. with Al 2 O 3 , CuO and Nb 2 O 5 As raw materials, mix the ingredients according to the above proportions and put them into a nylon ball mill tank, add absolute ethanol and grinding balls, and perform ball milling at 300 rpm for 24 hours to mix the raw materials evenly to obtain mixed powder. After drying the mixed powder (holding at 100° C. for 4 hours), molding (pressing at 100 MPa for 1 minute) to obtain a green cylindrical sample. The obtained cylindrical sample green body was sintered at 900° C. for 4 hours to obtain a sintered and dense LTCC dielectric material. X-ray diffraction (XRD pattern, figure 1 ) analysis shows that the ceramic phase composition of the LTCC dielectric material is mainly Al 2 O 3 , no glass phase. The microwave dielectric performa...

Embodiment 2

[0041] M=MgTi, A=Mn, B=Ti, x=85wt%, y=15wt%, a=60wt%, b=40wt%, then the LTCC dielectric material xMO m +y(aAO n -bBO t ) can be expressed as 85wt% MgTiO 3 -15wt% (50wt% MnO 2 -50wt% TiO 2 ), oxide activator is referred to as MT. As synthesized MgTiO 3 , and MnO 2 and TiO 2 As raw materials, mix the ingredients according to the above proportions and put them into a nylon ball mill tank, add absolute ethanol and grinding balls, and carry out ball milling for 24 hours to make the raw materials evenly mixed. After the mixed raw materials are dried, a cylindrical sample green body is obtained after molding, and sintered at 925° C. for 4 hours to obtain a sintered and dense ceramic sample. The microwave dielectric performance test shows that the obtained ceramic sample has a dielectric constant of 18 (@10GHz) and a quality factor of Q·f~22000GHz, showing excellent microwave dielectric performance.

Embodiment 3

[0043] M=NdAl, A=Cu, B=Ti, x=80wt%, y=20wt%, a=50wt%, b=50wt%, then the LTCC dielectric material xMO m +y(aAO n -bBO t ) can be expressed as 80wt% NdAlO 3 -20wt%(50wt%CuO-50wt%TiO 2 ), the oxide activator is referred to as CT. The synthesized NdAlO 3 , and CuO and TiO 2 As raw materials, mix the ingredients according to the above proportions and put them into a nylon ball mill tank, add absolute ethanol and grinding balls, and carry out ball milling for 24 hours to make the raw materials evenly mixed. After the mixed raw materials are dried, a cylindrical sample green body is obtained after molding, and sintered at 925° C. for 4 hours to obtain a sintered and dense ceramic sample. The surface of the microwave dielectric property test shows that the obtained ceramic sample has a dielectric constant of 22 (@10GHz) and a quality factor of Q·f~12000GHz, showing excellent microwave dielectric properties.

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Abstract

The invention relates to a low-temperature co-fired ceramic dielectric material and a preparation method thereof. The components of the LTCC dielectric material include an oxide dielectric material with a high sintering temperature and an oxide activator, and the content of the oxide activator is 1- 20 wt%, and the balance is oxide dielectric material with high sintering temperature; the oxide dielectric material with high sintering temperature is the oxide of M, wherein M is Mg, Al, Ti, Ca, Zr, Nd, MgTi, At least one of MgAl, CaTi, NdAl; the components of the oxide activator include oxides of A and oxides of B, and A is at least one of Zn, Cu, Mn, Sn, Fe, Co, Ni species, B is at least one of V, Nb, Ta, Ti, and Si, and the mass content of the oxide of A accounts for 10-100 wt% of the total mass of the oxide activator.

Description

technical field [0001] The invention relates to a low-temperature co-fired ceramic dielectric material (LTCC dielectric material) and a preparation method thereof, in particular to an LTCC dielectric material with adjustable dielectric constant prepared by grain boundary activation sintering and a preparation method thereof, belonging to LTCC dielectric materials material field. Background technique [0002] As one of the core technologies of passive integration and package interconnection, LTCC dielectric (Low temperature co-fired ceramics, LTCC) technology is to make low temperature sintered ceramic powder into green ceramic tape, using punching, micro-hole grouting, electrode printing A circuit pattern containing gold metal electrodes, silver metal electrodes or copper metal electrodes can be produced on green ceramic tapes by other processes, and various passive components (such as capacitors, resistors, filters, couplers, etc.) can be embedded in multiple layers. In th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/465C04B35/50C04B35/622
CPCC04B35/10C04B35/465C04B35/50C04B35/622C04B2235/3281C04B2235/3251C04B2235/3232C04B2235/3267C04B2235/602C04B2235/656C04B2235/6567
Inventor 马名生刘志甫李永祥
Owner ZHEJIANG SIRAMIC TECH CO LTD
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