Degradable low-temperature co-fired ceramic and preparation method thereof

A technology of low-temperature co-fired ceramics and ceramics, which is applied in the field of electronic engineering applications and can solve problems such as environmental pollution

Active Publication Date: 2018-11-23
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims to solve the problem of environmental pollution in the recycling of waste electronic equipment. By providing a degradable low-temperature co-fired ceramic material and its preparation method, the waste electronic components can be degraded by themselves in the water environment, and precious metals can be extracted safely and environmentally friendly. In order to avoid the environmental pollution caused by the traditional strong acid and strong alkali corrosion process

Method used

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  • Degradable low-temperature co-fired ceramic and preparation method thereof
  • Degradable low-temperature co-fired ceramic and preparation method thereof

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preparation example Construction

[0025] Such as figure 1 Shown, a kind of preparation method of above-mentioned degradable low-temperature co-fired ceramics, comprises the following steps:

[0026] S1, with SiO 2 , SiO 2 ·nH 2 O, H 3 BO 3 , B 2 o 3 , NaOH, KOH, Ba(OH) 2 ·8H 2 O, Al(OH) 3 , MgO, CaO, SrO, ZnO and rare earth oxides as raw materials, according to the composition of ceramics, weigh each raw material separately, and add distilled water according to the water-solid ratio of 3 to 5:1 to make a mixture, and set aside;

[0027] S2. Using a ball mill to mill the water-solid mixture in step S1, the milling time is 5 to 7 hours;

[0028] S3. After the treatment in step S2, the ceramic suspension slurry is separated, and dried at a temperature of 80-100° C. to a constant weight for 24-36 hours to obtain a dry sample;

[0029] S4, taking out the dry sample and crushing and grinding to obtain a powdery material with a particle size of 2-50 μm;

[0030] S5, placing the powdery material in a cruc...

Embodiment 1

[0034] A method for preparing the above-mentioned degradable low-temperature co-fired ceramics, comprising the following steps:

[0035] S1, with SiO 2 、H 3 BO 3 , Al(OH) 3 as raw material, according to xB 2 o 3 ·ySiO 2 · zAl 2 o 3 In wMO, x=23%, y=64%, z=13%, w=0% ratio, weigh each raw material separately, and add distilled water according to the water-solid ratio of 3-5:1 to make a mixture, set aside ;

[0036] S2. Use a ball mill to mill the water-solid mixture in step S1, and the milling time is 6 hours;

[0037] S3. After the treatment in step S2, the ceramic suspension slurry is separated, and dried at a temperature of 90° C. to a constant weight for 30 hours to obtain a dry sample;

[0038] S4, taking out the dry sample and crushing and grinding to obtain a powdery material with a particle size of 2-50 μm;

[0039] S5, placing the powdery material in a crucible, and calcining at a temperature of 300° C. for 5 hours to obtain a pre-calcined sample;

[0040] S6,...

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Abstract

The invention discloses degradable low-temperature co-fired ceramic, and relates to a ceramic material which takes a boron silicate inorganic polymeric molecular structure as a main structure; a composition chemical formula is xB2O3.ySiO2.zAl2O3.wMO, wherein MO is at least one of MgO, CaO, SrO, BaO, Na2O, Al2O3, K2O, ZnO or rare-earth element oxides, x, y, z and w are mass percentages, x is greater than or equal to 20 percent and is smaller than or equal to 65 percent, y is greater than or equal to 15 percent and is smaller than or equal to 65 percent, z is greater than or equal to 0 and is smaller than or equal to 30 percent, and w is greater than or equal to 0 and is smaller than or equal to 30 percent. A preparation method of the degradable low-temperature co-fired ceramic is characterized by taking SiO2, SiO2.nH2O, H3BO3, B2O3, NaOH, KOH, Ba(OH)2.8H2O, Al(OH)3, MgO, CaO, SrO, ZnO and rare-earth oxide as raw materials, and adopting the technological steps of ball milling, drying, grinding, roasting, pelleting, forming and sintering. According to a unique boron-rich silicon inorganic polymeric structure which is used as a hydrolysis trigger phase and through chemical compositioncontrol of the degradable low-temperature co-fired ceramic and dispersive distribution design of the hydrolysis trigger phase in the structure, the degradable low-temperature co-fired ceramic can be spontaneously degraded under a wet condition and in the environment of water, salt solution and the like.

Description

technical field [0001] The invention belongs to the field of electronic engineering application and material technology, and in particular relates to a degradable low-temperature co-fired ceramic and a preparation method thereof. Background technique [0002] The development of low-temperature cofired ceramics (Low-temperature cofired ceramics, LTCC) technology has supported the development of circuit integrated packaging and component integration technology, and has become the development direction of passive integration and passive devices, as well as the development of supercomputer technology and national defense information technology. The construction provides important basic conditions, and it has attracted wide attention at home and abroad. In addition to requiring ceramic materials to have specific physical properties, LTCC technology is notable for the fact that the sintering temperature of ceramics must be lower than the melting point of the co-fired metal electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B35/622
CPCC04B35/14C04B35/622C04B2235/3201C04B2235/3206C04B2235/3208C04B2235/3213C04B2235/3217C04B2235/3224C04B2235/3284C04B2235/3409
Inventor 陈松孙大明黎文徐博韩雪玲王航
Owner SOUTHWEST JIAOTONG UNIV
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