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Low-temperature co-fired ceramic dielectric material and preparation method thereof

A dielectric material and low dielectric constant technology, applied in the field of LTCC dielectric materials, can solve problems such as reducing the sintering temperature of LTCC dielectric materials, achieve great practical value, simple preparation process, and easy control of material comprehensive properties and sintering characteristics

Active Publication Date: 2019-09-24
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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  • Low-temperature co-fired ceramic dielectric material and preparation method thereof
  • Low-temperature co-fired ceramic dielectric material and preparation method thereof
  • Low-temperature co-fired ceramic dielectric material and preparation method thereof

Examples

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Embodiment 1

[0039] Select 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 ) composition can be expressed as 90wt% Al 2 o 3 -10wt% (45wt% CuO-55wt% Nb 2 o 5 ), referred to as CN. Take Al 2 o 3 , CuO and Nb 2 o 5 As a raw material, mix according to the above ratio and put it into a nylon ball mill tank, add absolute ethanol and balls, and perform ball milling at 300 rpm for 24 hours to mix the raw materials evenly to obtain a mixed powder. The mixed powder was dried (at 100°C for 4 hours), and then molded (pressed at 100MPa for 1 minute) to obtain a cylindrical sample green body. The obtained cylindrical sample green body was sintered at 900° C. for 4 hours to obtain a sintered dense LTCC dielectric material. X-ray diffraction (XRD pattern, figure 1 ) analysis shows that the ceramic phase composition of LTCC dielectric material is mainly Al 2 o 3 , no glass phase. Microwave dielectric property tests show that the d...

Embodiment 2

[0041] Select 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 ) composition can be expressed as 85wt% MgTiO 3 -15wt% (50wt% MnO 2 -50wt%TiO 2 ), the oxide activator is referred to as MT. Synthesized MgTiO 3 , and MnO 2 and TiO 2 As a raw material, mix according to the above ratio and put it into a nylon ball mill tank, add absolute ethanol and balls, and carry out ball milling for 24 hours to make the raw materials mix evenly. After the mixed raw materials are dried, they are molded to obtain a cylindrical sample green body, which is sintered at 925° C. for 4 hours to obtain a sintered dense ceramic sample. Microwave dielectric property tests show that the obtained ceramic samples have a dielectric constant of 18 (@10GHz) and a quality factor of Q·f~22000GHz, showing excellent microwave dielectric properties.

Embodiment 3

[0043] Select 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 ) composition can be expressed as 80wt% NdAlO 3 -20wt% (50wt% CuO-50wt% TiO 2 ), the oxide activator is referred to as CT. To synthesize good NdAlO 3 , and CuO and TiO 2 As a raw material, mix according to the above ratio and put it into a nylon ball mill tank, add absolute ethanol and balls, and carry out ball milling for 24 hours to make the raw materials mix evenly. After the mixed raw materials are dried, they are molded to obtain a cylindrical sample green body, which is sintered at 925° C. for 4 hours to obtain a sintered dense ceramic sample. Microwave dielectric properties test surface, the dielectric constant of the obtained ceramic samples is 22 (@10GHz), quality factor 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 LTCC dielectric material comprises an oxide dielectric material having a high sintering temperature and an oxide activator, and the LTCC dielectric material concretely comprises 1-20 wt% of the oxide activator, and the balance of the oxide dielectric material having the high sintering temperature; the oxide dielectric material with the high sintering temperature is an oxide of M, wherein M is at least one of Mg, Al, Ti, Ca, Zr, Nd, MgTi, MgAl, CaTi and NdAl; and the oxide activator comprises an oxide of A and an oxide of B, A is at least one of Zn, Cu, Mn, Sn, Fe, Co and Ni, B is at least one of V, Nb, Ta, Ti and Si, and the mass of the oxide of A is 10-100% 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 material field. Background technique [0002] As one of the core technologies of passive integration and packaging interconnection, LTCC dielectric (Low temperature co-fired ceramics, LTCC) technology is to make low temperature sintered ceramic powder into green ceramic tape, and use punching, microhole grouting, electrode printing and other processes to produce circuit patterns containing gold metal electrodes, silver metal electrodes or copper metal electrodes on the green ceramic tape, and can embed a variety of passive components (such as capacitors, resistors, filters, couplers, etc.) In the green ceramic tape, the mult...

Claims

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Application Information

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Patent Type & Authority Applications(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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