Tape casting-warm compaction composite molding process for micro-nano cross-scale mixed ceramic substrate

A ceramic substrate and composite molding technology, which is applied in the direction of ceramic molding machines, manufacturing tools, etc., can solve the problems of mixed substrates with large, micro, and nano scales in thickness, and achieve the effects of lower sintering temperature, high thermal conductivity, and high thermal conductivity

Active Publication Date: 2019-10-15
FOSHAN BAIRUI NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a tape-casting-warm-pressure composite molding process for micro-nano cross-scale hybrid ceramic substrates to solve the problems in the preparation of thicker micro-nano cross-scale hybrid substrates

Method used

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  • Tape casting-warm compaction composite molding process for micro-nano cross-scale mixed ceramic substrate
  • Tape casting-warm compaction composite molding process for micro-nano cross-scale mixed ceramic substrate

Examples

Experimental program
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Effect test

Embodiment 1

[0020] A tape-casting-warm-compression composite molding process for micro-nano cross-scale hybrid ceramic substrates, such as figure 1 As shown, it mainly includes the following steps:

[0021] According to the total amount of 600g of ceramic material, calculate the amount of alumina powder with a median particle size of 3μm and a median particle size of 30nm with a volume ratio of 75:25, and weigh them respectively; add 277.5g of ethanol solvent and 31g of herring oil dispersant Ball milling and mixing for 24 hours. After ball milling, add 58.5g of PVB binder and 32.5g of polyethylene glycol plasticizer, and continue ball milling for 20h. Then add 0.5 g of defoaming agent, and defoam in a vacuum stirring tank for 20 minutes to obtain a ceramic slurry with a solid content of 60%. Cast the obtained ceramic slurry on a casting machine, and dry it in the main drying zone of the casting machine at 120°C for 20 minutes to obtain a ceramic green tape, cut the obtained ceramic gre...

Embodiment 2

[0024] A tape-casting-warm-compression composite molding process for micro-nano cross-scale hybrid ceramic substrates, such as figure 1 As shown, it mainly includes the following steps:

[0025] According to the total amount of 650g of ceramic material, the alumina powder with a median particle size of 5μm, the alumina powder with a median particle size of 50nm and the high thermal conductivity with a median particle size of 50nm are calculated at a volume ratio of 60:15:25. ZnO–B 2 o 3 – SiO 2 The amount of glass powder is weighed separately; 242.5g of ethanol solvent and 27g of herring oil dispersant are added and mixed by ball milling for 26 hours. After ball milling, add 50g of PVB binder and 30g of polyethylene glycol plasticizer, and continue ball milling for 24h. Then add 0.5g defoaming agent, defoaming in a vacuum stirring tank for 25min to obtain a ceramic slurry with a solid content of 65%. After drying in the main drying area for 25 minutes, the ceramic green ...

Embodiment 3

[0027] A tape-casting-warm-compression composite molding process for micro-nano cross-scale hybrid ceramic substrates, such as figure 1 As shown, it mainly includes the following steps:

[0028] According to the total amount of 700g of ceramic material, the aluminum nitride powder with a median particle size of 5 μm and the aluminum nitride powder with a median particle size of 30 nm and the aluminum nitride powder with a median particle size of 30 nm are calculated at a volume ratio of 65:20:15. The amount of high thermal conductivity Ca-Al-B-Si-O glass powder is weighed separately; 221.5g of ethanol solvent and 21g of herring oil dispersant are added and mixed by ball milling for 28 hours. After ball milling, add 38g of PVB binder and 19g of polyethylene glycol plasticizer, and continue ball milling for 26h. Then add 0.5g defoaming agent, defoaming in a vacuum stirring tank for 30min, to obtain a ceramic slurry with a solid content of 70%. After drying in the main drying a...

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Abstract

The invention relates to a tape casting-warm compaction composite molding process of a micro-nano cross-scale mixed ceramic substrate, wherein the raw material powder of the ceramic substrate comprises micron powder and nano powder. The tape casting-warm compaction process comprises the following steps: preparing a ceramic green belt by a tape casting method, cutting the ceramic green belt into aregular shape after drying, stacking the ceramic green belt in a special mold, and pressing the ceramic green belt by a warm press at a certain temperature to allow micron powder particles in the ceramic green belt to be continuously communicated in a vertical pressure direction to serve as a framework and to allow nano powder particles to be filled in gaps of the micron powder particle framework.According to the tape casting-warm compaction composite molding process, the micron powder in the ceramic substrate is closely connected and mutually communicated to form a heat conduction channel similar to a one-dimensional material, and the heat conduction capability of the substrate after the ceramic green belt is sintered is greatly improved; at the same time, the densification sintering temperature of the ceramic green belt is reduced by adding the high-activity nano powder, and the composite ceramic substrate with excellent thermal conductivity is suitable to prepare at the lower sintering temperature.

Description

technical field [0001] The invention belongs to the field of preparation of fine ceramics, and in particular relates to a tape-casting-warm-pressure composite molding process of a micro-nano cross-scale hybrid ceramic substrate. Background technique [0002] In today's environment of accelerated evolution such as 5G network construction, Industry 4.0, and the Internet of Things, electronic products have higher and higher requirements for signal transmission speeds, and traditional materials with electromagnetic shielding properties will leave the stage. With the development of advanced precision manufacturing technology, the unit integration density of components is getting higher and higher, and the calorific value is also increasing. Advanced ceramic materials have become one of the materials with the widest application prospects due to their excellent non-electromagnetic shielding performance and thermal conductivity. Tape casting method is currently the main way to prepa...

Claims

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Application Information

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IPC IPC(8): C04B35/111C04B35/582C04B35/622B28B1/29B28B3/02
CPCB28B1/29B28B3/02C04B35/111C04B35/581C04B35/622C04B2235/365C04B2235/3873C04B2235/5436C04B2235/5454C04B2235/656C04B2235/6567C04B2235/9607
Inventor 王双喜陈鹏欧阳雪琼靳艺凯郑华强
Owner FOSHAN BAIRUI NEW MATERIAL TECH CO LTD
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