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

A low-temperature co-fired ceramics and powder technology, applied in the field of low-temperature co-fired ceramics, can solve problems such as unfavorable industrial production and low thermal conductivity of materials, and achieve the effects of small thermal expansion coefficient, high thermal conductivity and good thermal stability.

Active Publication Date: 2014-09-03
CHONGQING YUNTIANHUA HIGH END NEW MATERIALS DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation methods of the basic materials reported above all use aluminum nitride and glass materials to increase the thermal conductivity of the material, and the thermal conductivity of the prepared material is low, and it is not conducive to large-scale industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] Correspondingly, the present invention also provides a preparation method of a low-temperature co-fired ceramic material, comprising the following steps: mixing borosilicate glass powder with a weight ratio of (60-85):(15-40) and silicon carbide, and then adding Ethanol, dried after ball milling to obtain low-temperature co-fired ceramic powder; adding solvent, binder, plasticizer, dispersant and wetting agent to the low-temperature co-fired ceramic powder, mixing evenly, and tape-casting , and the low-temperature co-fired ceramic material is obtained after drying. Wherein, the borosilicate glass preferably has a weight ratio of (50-65): (20-30): (1-10): (2-5): (5-10): (0.5-3): (0.5~3):(1~5) SiO 2 , B 2 o 3 , MgO, Al 2 o 3 , aluminum borate, K 2 O. Li 2 O and RO 2Composition, the R is Zr and / or Ti. Among the above components, the addition of MgO promotes the crystallization of the glass phase, reduces the content of the glass phase in the substrate material, an...

Embodiment 1

[0042] Embodiment 1: (glass powder is 70wt%, ceramic powder 30wt%)

[0043] Step (1) prepares glass powder;

[0044] Weigh and mix the raw materials with the following weights, add ethanol, ball mill and mix at a speed of 300r / min for 10 hours in a planetary ball mill, and then dry at 120°C;

[0045] Al 2 o 3 : 2g (2%);

[0046] h 3 BO 3 : 17.4g (B 2 o 3 The mass fraction is 20%);

[0047] MgO: 5g (5%);

[0048] K 2 CO 3 : 1.5g (K 2 The mass fraction of O is 1%);

[0049] Li 2 CO 3 : 7.4g (Li 2 The mass fraction of O is 3%);

[0050] SiO 2 : 60g (60%);

[0051] Aluminum borate: 6g (6%);

[0052] ZrO 2 : 1.5g (1.5%);

[0053] TiO 2 : 1.5g (1.5%);

[0054] Place the dried powder in a corundum crucible to raise the temperature to 1450°C at a rate of 5°C / min and keep it warm for 2 hours, then place the obtained liquid glass in deionized water for water quenching to obtain glass powder;

[0055] The glass powder was pulverized, then an appropriate amount of ...

Embodiment 2

[0059] Embodiment 2 (glass powder 85wt%, ceramic powder 15wt%)

[0060] Step (1) prepares glass powder:

[0061] The raw materials of the following weights were weighed and mixed with ethanol, ball milled and mixed at a speed of 300r / min for 10 hours in a planetary ball mill, and then dried at 120°C:

[0062] Al 2 o 3 : 5g (5%);

[0063] h 3 BO 3 : 22.2g (B 2 o 3 The mass fraction of is 25%);

[0064] MgO: 7g (7%);

[0065] K 2 CO 3 : 4.4g (K 2 The mass fraction of O is 3%);

[0066] Li 2 CO 3: 2.5g (Li 2 The mass fraction of O is 1%);

[0067] SiO 2 : 54g (54%);

[0068] Aluminum borate: 3g (3%);

[0069] ZrO 2 : 2g (2%);

[0070] Place the dried powder in a corundum crucible to raise the temperature to 1450°C at a rate of 5°C / min and keep it warm for 2 hours, then place the obtained liquid glass in deionized water for water quenching to obtain glass powder;

[0071] After pulverizing the glass powder, add an appropriate amount of deionized water, then b...

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Abstract

The invention discloses a low-temperature co-fired ceramic material and a preparation method thereof. The material comprises the following components in percentage by weight: 60%-85% of borosilicate glass and 15%-40% of silicon carbide. The silicon carbide ceramic has characteristics of strong oxidation resistance, excellent abrasion resistance performance, excellent thermal stability, large high-temperature strength, small thermal expansion coefficient, high thermal conduction, excellent thermal shock resistance, chemical corrosion resistance and the like. Compared with the prior art, for the invention, SiC material with high thermal conduction is added into the borosilicate glass, the thermal conduction of the LTCC (low-temperature co-fired ceramic) substrate material is improved; the low-temperature densely sintering of the SiC material is realized, and the low-temperature co-fired ceramic material is suitable for large scale industrialization production. The test results prove that the thermal expansion coefficient of the low-temperature co-fired ceramic material prepared by the invention is 3.9*10-6k-1, the dielectric constant is 5.2(1MHz), and the thermal conduction is 30W / mK.

Description

technical field [0001] The invention relates to the technical field of low-temperature co-fired ceramics, and more specifically, relates to a low-temperature co-fired ceramic material and a preparation method thereof. Background technique [0002] The electronic substrate is the carrier of the semiconductor chip package, carrying the support of electronic components and forming the base of the electronic circuit. Traditional inorganic substrates use Al 2 o 3 , AlN and SiC, etc. are used as substrates, and have excellent performance in terms of thermal conductivity and flexural strength. However, the sintering temperature of the traditional substrate is above 1500°C. If the simultaneous co-firing method is used, the conductor material can only be selected from metals with high melting point and high resistance, such as Mo and W, which greatly increases the cost. [0003] Low-temperature co-fired ceramic (LTCC) technology has a lower sintering temperature, and metals with l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/00C03B32/02
Inventor 刘明龙杨晓战普雪涛江林朱红伟刘晏君
Owner CHONGQING YUNTIANHUA HIGH END NEW MATERIALS DEV CO LTD
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