CN1654417A - Process for producing high performance aluminas ceramic wafer by gel cutting and forming method - Google Patents
Process for producing high performance aluminas ceramic wafer by gel cutting and forming method Download PDFInfo
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- CN1654417A CN1654417A CN 200410039133 CN200410039133A CN1654417A CN 1654417 A CN1654417 A CN 1654417A CN 200410039133 CN200410039133 CN 200410039133 CN 200410039133 A CN200410039133 A CN 200410039133A CN 1654417 A CN1654417 A CN 1654417A
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Abstract
The present invention is jelly cutting formation process of producing high performance alumina ceramic chip. The production process includes compounding pre-mixed material with organic monomer 3.5-4.5 wt%, cross-linking agent 0.15-0.25 wt%, dispersant 2-4 wt% and water 17-20 wt%; adding superfine alumina powder as base material into the pre-mixed material, ball milling for 2 hr, adding initiator 0.2-0.4 wt%, ball milling for 10 min, adding catalyst 0.2-0.4 wt%, and ball milling for 10 min to making the slurry; injecting the slurry into glass mold, curing at 60-70 deg.c to form rod biscuit and demolding; soaking the biscuit in water for 3-6 hr to form rubber-like material, slicing, drilling hole, drying, sintering and plating electrodes. Thus produced chip has homogeneous density, no warpage after sintering, no deformation of holes, high voltage resistance and high performance.
Description
Technical field:
The present invention relates to adopt the production technique of ceramic substrate material produce high-performance electronic substrate, particularly a kind of production technique of jelly excision forming method production high-performance alumina series ceramic substrate.
Background technology:
Research at present and produce in the ceramic substrate material that adopts glass-glass system, sintered glass ceramics-Ceramic Composite system, one-component ceramic and alumina series are arranged, wherein with the ratio of performance to price optimum of alumina series.
The forming method that the base sheet adopts is mainly and rolls embrane method, hot die-casting method and casting method, and modern study shows that they respectively have relative merits, and division is as follows:
Roll embrane method and be exactly the material that to prepare and obtain fine powder after handling, add a certain amount of tackiness agent and mix the back and material is added in pressurize on a pair roller that grinds the sheet machine and rolls,, burn till after the oven dry until reaching thickness requirement through ball milling, oven dry.This method quantity of organic compounds is big, and sintering shrinks big, owing to roll the film direction and the non-film direction of rolling is stressed different in rolling, causes two direction shrinking percentages to differ about 3% simultaneously, and therefore, the substrate hole of producing is ovalize all.
Hot die-casting method be with the material for preparing levigate after, add tackiness agent and be made into slip, under certain temperature and pressure, inject metal die, the cooling back is taken out and is carried out de-waxing and burn till.The shortcoming of this method maximum is that the production cycle is long, the production cost height, and volume density is little, and total contraction causes bulk deformation serious greatly.
Casting method is that the mixed solution with the ceramic raw material of substrate and organic binder bond dissolves in the solvent, draws together into long and narrow continuous band with drawing together cutter.The herring bone dry air is removed solvent, on glass ribbon, go out desired substrate shape then.The substrate that forms is through pre-burning, and to remove organic bond, at high temperature roasting makes it sintering at last.The result of roasting, linear shrinkage reaches 18-25%, and like this, not only the dimensional precision of substrate is difficult to control, and its density is also inhomogeneous.
In a word, forming method commonly used at present all exists anisotropic serious, and the little and skewness of volume density shrinks big shortcoming, and warpage is serious, causes and produces special-shaped and substrate difficulty with holes, and withstand voltage properties is poor.
Summary of the invention:
Purpose of the present invention is intended to solve the deficiency of above-mentioned background technology, and a kind of improved gel-casting method that utilizes is provided, prepare the production technique of the jelly excision forming method production high-performance alumina series ceramic substrate of high performance alumina ceramic substrate by the method for cutting and processing gelatin charge bar.
The technical scheme that realizes the foregoing invention purpose is: the production craft step of this jelly excision forming method production high-performance alumina series ceramic substrate is: a, be base with the ultra-fine material powder of alumina series, the organic monomer of 3.5-4.5wt%, the linking agent of 0.15-0.25wt% and the dispersion agent of 2-4wt% are mixed with concentrated solution, and the water that adds 17-20wt% again is mixed with premixed liquid;
B, aluminum oxide powder is added in this premixed liquid, ball milling 2 hours, treat that its viscosity is suitable after, add the initiator of 0.2-0.4wt%, ball milling 10 minutes adds the catalyzer of 0.2-0.4wt% again, ball milling was made satisfactory slip in 10 minutes;
C, above-mentioned slip is injected glass mold, under 60-70 ℃, be solidified into bar-shaped biscuit, the demoulding then;
D, the biscuit after the demoulding was immersed in the water 3-6 hour, make it to become rubber-like material, cut into slices, perforation processing technology is to the shape and size requirement that reaches finished product, carries out drying, sintering and plated electrode technological process then.
Gel injection molding and forming technology is a kind of new colloidal formation technology that has occurred since the nineties, it combines traditional ceramics technology and polymer chemistry, be incorporated into the method for polymer chemistry monomer polymerization in the ceramic molding flexibly, by the concentrated suspension of the high solid volume fraction of preparation low viscosity, thus the base substrate of acquisition high-density high-strength and good uniformity.Its thinking is that concentrated suspension with the high solid volume fraction of low viscosity is under initiator, catalyzer and glue crosslinking agent effect, make the organic monomer in the concentrated suspension aggregate into tridimensional network, make the moulding of concentrated suspension in-situ solidifying, make it have the material that the processed-type that can cut can be produced the high-performance ceramic substrate by water logging.
The present invention is based on above-mentioned technology and improve, at first prepare fractional solid volume at the alumina series dense suspension more than 55%, carry out gel casting forming on this basis making biscuit, this biscuit volume density is high and evenly.No matter owing to be solid state or jelly state, biscuit has good intensity and toughness, can carry out mechanical workout, simultaneously because the volume density of substrate is even, burn till not warpage of mera, the void shape of processing is constant, therefore is the preferred method of producing high pressure resistant high performance alumina series electronic substrates.
Description of drawings:
Fig. 1 is technological process of production figure of the present invention.
Embodiment:
Below in conjunction with drawings and Examples in detail the present invention is described in detail.
The embodiment of the invention is a base with 1 kilogram of ultra-fine alumina powder material, and the organic monomer of 40 grams, the linking agent and the 34 gram dispersion agents of 2 grams are mixed with concentrated solution, and the water that adds 185 grams again is mixed with premixed liquid; The ultra-fine alumina powder material is added in this premixed liquid, ball milling 2 hours, treat that its viscosity is suitable after, add the initiators of 3.4 grams, ball milling 10 minutes adds 3.4 catalyzer again, ball milling was made satisfactory slip in 10 minutes; Above-mentioned slip is injected glass mold, under 65 ℃, be solidified into bar-shaped biscuit, the demoulding then; Biscuit after the demoulding was immersed in the water 5 hours, make it to become rubber-like material, cut into slices, perforation processing technology is to the shape and size requirement that reaches finished product, carries out drying, sintering and plated electrode technological process then.
In the described production technique of present embodiment, this organic monomer is the acryloyl ammonium; This linking agent is N, N '-methylene-bis acrylic amine; This dispersion agent is the PMAA-Na of concentration 10%; This initiator is an ammonium persulphate; This catalyzer is N, N, N ', N ' ,-Tetramethyl Ethylene Diamine.
Claims (2)
1, a kind of production technique of jelly excision forming method production high-performance alumina series ceramic substrate, this processing step is:
A, be base with the ultra-fine material powder of alumina series, the organic monomer of 3.5-4.5wt%, the linking agent of 0.15-0.25wt% and the dispersion agent of 2-4wt% are mixed with concentrated solution, the water that adds 17-20wt% again is mixed with premixed liquid;
B, aluminum oxide powder is added in this premixed liquid, ball milling 2 hours, treat that its viscosity is suitable after, add the initiator of 0.2-0.4wt%, ball milling 10 minutes adds the catalyzer of 0.2-0.4wt% again, ball milling was made satisfactory slip in 10 minutes;
C, above-mentioned slip is injected glass mold, under 60-70 ℃, be solidified into bar-shaped biscuit, the demoulding then;
D, the biscuit after the demoulding was immersed in the water 3-6 hour, make it to become rubber-like material, cut into slices, perforation processing technology is to the shape and size requirement that reaches finished product, carries out drying, sintering and plated electrode technological process then.
2, the production technique of jelly excision forming method production high-performance alumina series ceramic substrate according to claim 1 is characterized in that this organic monomer is the acryloyl ammonium; This linking agent is N, N '-methylene-bis acrylic amine; This dispersion agent is the PMAA-Na of concentration 10%; This initiator is an ammonium persulphate; This catalyzer is N, N, N ', N ' ,-Tetramethyl Ethylene Diamine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410039133 CN1280230C (en) | 2004-02-12 | 2004-02-12 | Process for producing high performance aluminas ceramic wafer by gel cutting and forming method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410039133 CN1280230C (en) | 2004-02-12 | 2004-02-12 | Process for producing high performance aluminas ceramic wafer by gel cutting and forming method |
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| Publication Number | Publication Date |
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| CN1654417A true CN1654417A (en) | 2005-08-17 |
| CN1280230C CN1280230C (en) | 2006-10-18 |
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| CN 200410039133 Expired - Fee Related CN1280230C (en) | 2004-02-12 | 2004-02-12 | Process for producing high performance aluminas ceramic wafer by gel cutting and forming method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107619264A (en) * | 2017-10-16 | 2018-01-23 | 深圳市商德先进陶瓷股份有限公司 | Aluminium oxide ceramic substrate and its preparation method and application |
| CN109081685A (en) * | 2018-09-13 | 2018-12-25 | 南京鑫达晶体材料科技有限公司 | A kind of aluminium oxide ceramics and preparation method thereof |
-
2004
- 2004-02-12 CN CN 200410039133 patent/CN1280230C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107619264A (en) * | 2017-10-16 | 2018-01-23 | 深圳市商德先进陶瓷股份有限公司 | Aluminium oxide ceramic substrate and its preparation method and application |
| CN107619264B (en) * | 2017-10-16 | 2020-04-03 | 深圳市商德先进陶瓷股份有限公司 | Alumina ceramic substrate and preparation method and application thereof |
| CN109081685A (en) * | 2018-09-13 | 2018-12-25 | 南京鑫达晶体材料科技有限公司 | A kind of aluminium oxide ceramics and preparation method thereof |
| CN109081685B (en) * | 2018-09-13 | 2021-09-24 | 南京鑫达晶体材料科技有限公司 | Alumina ceramic and preparation method thereof |
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| Publication number | Publication date |
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| CN1280230C (en) | 2006-10-18 |
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