CN105541302A - Preparation method of transparent alumina ceramic - Google Patents
Preparation method of transparent alumina ceramic Download PDFInfo
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- CN105541302A CN105541302A CN201510850472.0A CN201510850472A CN105541302A CN 105541302 A CN105541302 A CN 105541302A CN 201510850472 A CN201510850472 A CN 201510850472A CN 105541302 A CN105541302 A CN 105541302A
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Abstract
The invention relates to a preparation method of a transparent alumina ceramic, and belongs to the field of preparation of functional materials. The purpose of the invention is to provide the preparation method of the transparent alumina ceramic with high light transmittance and simple preparation process. The method comprises the following steps: adding a binder to a butanone and ethanol mixed solvent, carrying out ball milling on the mixed solvent and the binder for 4h, adding the obtained mixed solvent and binder slurry to alumina powder, carrying out ball milling on the obtained alumina powder in the presence of a dispersant, a plasticizer and a sintering aid to obtain a slurry, processing the slurry to produce transparent alumina blank sheets with the thickness of 1mm, heating the blank sheets in a high temperature box type furnace at a rate of 2DEG C/min to 1400DEG C, dumping the heated blank sheets, sintering the dumped blank sheets in hydrogen atmosphere at 1830DEG C, and maintaining the temperature for 1.5h to obtain the transparent alumina ceramic. The above product prepared through the method has the advantages of compact microscopic structure, no pore residual, uniform crystal grains size mostly being 10-20[mu]m, clear crystal boundaries, no precipitation of a second phase or impurities, and high total light transmittance reaching up to 73.5%.
Description
Technical field
The invention belongs to functional materials preparation field, particularly relate to transparent alumina ceramics preparation method.
Background technology
Crystalline ceramics refers to the polycrystalline material with certain light transmission adopting ceramic process to prepare.Crystalline ceramics not only has the intrinsic high strength of pottery, high rigidity, high temperature resistant, corrosion-resistant, the performances such as excellent chemical stability, there are again the optical property of glass and excellent dielectric properties, low conductivity, the unrivaled performance of many other materials such as high heat conductance, therefore lighting engineering can be widely used in, laser technology, extraordinary instrument manufacturing, high-temperature technology, Wireless Electronics, the high-tech sector transparent alumina ceramicses such as information detection technology and war industry are that the first realizes transparent pottery, not only there is high strength, high rigidity, corrosion-resistant, the feature such as high temperature resistant, and have good perviousness to visible ray and infrared light, raw material is easy to get simultaneously, cheap, therefore crystalline ceramics discharge tube is widely used in, crystalline ceramics is armoring, LED substrate material and packaged material.
The moulding process of transparent alumina ceramics mainly contains dry-pressing formed, injection molding, extrusion moulding and isostatic pressing etc., but adopt these moulding processs to be difficult to prepare the flawless crystalline ceramics blank of smooth surface between thickness tens microns to 1mm, flow casting molding is the single-phase or more effective technique of complex phase ceramic lamellar structure material of preparation, and have production efficiency high, can operate continuously; Defect size is little; Little, the stable performance of product composition fluctuating; Can be mass-produced; Be suitable for the advantages such as shaping large-scale thin plate pottery, but often need to add a large amount of organism in order to good snappiness can be obtained, this just requires strict Controlling Technology parameter, otherwise just easily cause the low and not easily defect such as stripping of peeling, striped, blank intensity, organism simultaneously used, because toxic, easily causes environmental pollution.
Summary of the invention
The object of this invention is to provide a kind of transmittance high, and the simple transparent alumina ceramics preparation method of preparation process.
The present invention is achieved by the following technical programs: a kind of transparent alumina ceramics preparation method, 6wt% binding agent polyvinyl butyral acetal is added in butanone and alcohol mixed solvent, ball milling 4h, the slurry of mixed solvent and binding agent is joined in aluminum oxide powder, be dispersion agent with 1wt% trolamine, the mixture of 5wt% polyoxyethylene glycol and dibutyl phthalate is softening agent, magnesium nitrate, Yttrium trinitrate, lanthanum nitrate is sintering aid, ball milling 24h, obtain the slurry that solid load is 50vol%, be prepared into the transparent alumina blank that 1mm is thick, blank is warming up to 1400 DEG C of binder removals at high temperature box furnace with 2 DEG C/min, then the base substrate after binder removal is sintered at hydrogen atmosphere, sintering temperature is 1830 DEG C, and be incubated 1.5h, obtain transparent alumina ceramics.
In butanone and alcohol mixed solvent, volume fraction of ethanol is 50%.
Two kinds of material 1:1 mixing in mass ratio in the mixture of described polyoxyethylene glycol and dibutyl phthalate.
The ratio of described magnesium nitrate, Yttrium trinitrate, lanthanum nitrate 1:1:2 is in mass ratio added, and the total amount that three adds accounts for the 50vol% of described slurry.
The present invention has following beneficial effect:
The product microstructure that the method prepares is fine and close, and pore-free remains, and grain-size is relatively more even, and mostly at 10-20 μm, crystal boundary is clear, does not have the precipitation of second-phase and impurity, and its total light transmittance is up to 73.5%.
Embodiment
Below in conjunction with specific embodiment, the present invention will be further described.
Specific embodiment: add 6wt% binding agent polyvinyl butyral acetal in butanone and alcohol mixed solvent, ball milling 4h, the slurry of mixed solvent and binding agent is joined in aluminum oxide powder, be dispersion agent with 1wt% trolamine, the mixture of 5wt% polyoxyethylene glycol and dibutyl phthalate is softening agent, magnesium nitrate, Yttrium trinitrate, lanthanum nitrate is sintering aid, ball milling 24h, obtain the slurry that solid load is 50vol%, be prepared into the transparent alumina blank that 1mm is thick, blank is warming up to 1400 DEG C of binder removals at high temperature box furnace with 2 DEG C/min, then the base substrate after binder removal is sintered at hydrogen atmosphere, sintering temperature is 1830 DEG C, and be incubated 1.5h, obtain transparent alumina ceramics.
In butanone and alcohol mixed solvent, volume fraction of ethanol is 50%.
Two kinds of material 1:1 mixing in mass ratio in the mixture of described polyoxyethylene glycol and dibutyl phthalate.
The ratio of described magnesium nitrate, Yttrium trinitrate, lanthanum nitrate 1:1:2 is in mass ratio added, and the total amount that three adds accounts for the 50vol% of described slurry.
Carry out displaing microstructure observing to the product prepared, find that its microstructure is fine and close, pore-free remains, and grain-size is relatively more even, and mostly at 10-20 μm, crystal boundary is clear, does not have the precipitation of second-phase and impurity; Detect its transmittance, its total light transmittance is 73.5%.
Above content is the further description done the present invention in conjunction with concrete embodiment, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (4)
1. a transparent alumina ceramics preparation method, it is characterized in that: in butanone and alcohol mixed solvent, add 6wt% binding agent polyvinyl butyral acetal, ball milling 4h, the slurry of mixed solvent and binding agent is joined in aluminum oxide powder, be dispersion agent with 1wt% trolamine, the mixture of 5wt% polyoxyethylene glycol and dibutyl phthalate is softening agent, magnesium nitrate, Yttrium trinitrate, lanthanum nitrate is sintering aid, ball milling 24h, obtain the slurry that solid load is 50vol%, be prepared into the transparent alumina blank that 1mm is thick, blank is warming up to 1400 DEG C of binder removals at high temperature box furnace with 2 DEG C/min, then the base substrate after binder removal is sintered at hydrogen atmosphere, sintering temperature is 1830 DEG C, and be incubated 1.5h, obtain transparent alumina ceramics.
2. transparent alumina ceramics preparation method as claimed in claim 1, is characterized in that: in butanone and alcohol mixed solvent, volume fraction of ethanol is 50%.
3. transparent alumina ceramics preparation method as claimed in claim 1, is characterized in that: two kinds of material 1:1 mixing in mass ratio in the mixture of described polyoxyethylene glycol and dibutyl phthalate.
4. transparent alumina ceramics preparation method as claimed in claim 1, is characterized in that: the ratio of described magnesium nitrate, Yttrium trinitrate, lanthanum nitrate 1:1:2 is in mass ratio added, and the total amount that three adds accounts for the 50vol% of described slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510850472.0A CN105541302A (en) | 2015-11-30 | 2015-11-30 | Preparation method of transparent alumina ceramic |
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| CN201510850472.0A CN105541302A (en) | 2015-11-30 | 2015-11-30 | Preparation method of transparent alumina ceramic |
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| CN105541302A true CN105541302A (en) | 2016-05-04 |
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| CN201510850472.0A Pending CN105541302A (en) | 2015-11-30 | 2015-11-30 | Preparation method of transparent alumina ceramic |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106966709A (en) * | 2017-04-01 | 2017-07-21 | 广东工业大学 | A kind of preparation method of transparent alumina ceramics |
| CN107721395A (en) * | 2017-10-09 | 2018-02-23 | 宁夏钜晶电子材料科技有限公司 | Transparent alumina ceramics preparation method |
| CN111620678A (en) * | 2020-05-27 | 2020-09-04 | 新化县群华陶瓷科技有限公司 | Organic composite porous ceramic material and preparation method thereof |
-
2015
- 2015-11-30 CN CN201510850472.0A patent/CN105541302A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106966709A (en) * | 2017-04-01 | 2017-07-21 | 广东工业大学 | A kind of preparation method of transparent alumina ceramics |
| CN106966709B (en) * | 2017-04-01 | 2020-08-11 | 广东工业大学 | Method for preparing transparent alumina ceramic through 3D printing based on photocuring molding |
| CN107721395A (en) * | 2017-10-09 | 2018-02-23 | 宁夏钜晶电子材料科技有限公司 | Transparent alumina ceramics preparation method |
| CN111620678A (en) * | 2020-05-27 | 2020-09-04 | 新化县群华陶瓷科技有限公司 | Organic composite porous ceramic material and preparation method thereof |
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Application publication date: 20160504 |
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| WD01 | Invention patent application deemed withdrawn after publication |