CN103044074A - Surface fluorination protection method for ceramic material - Google Patents
Surface fluorination protection method for ceramic material Download PDFInfo
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- CN103044074A CN103044074A CN2012105957053A CN201210595705A CN103044074A CN 103044074 A CN103044074 A CN 103044074A CN 2012105957053 A CN2012105957053 A CN 2012105957053A CN 201210595705 A CN201210595705 A CN 201210595705A CN 103044074 A CN103044074 A CN 103044074A
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- stupalith
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- fluorine
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Abstract
The invention discloses a surface fluorination protection method for a ceramic material. The method comprises the steps that a ceramic material workpiece is placed into an air-tight cavity, and vacuumized; the oxygen content in the cavity is decreased; mixed gas containing fluorine is supplied to the cavity; fluorine reacts with the surface of the ceramic workpiece; and a fluoride protection layer is generated on the surface of the workpiece. The resistance to acid and alkali erosion of the workpiece is protected, and the surface hardness and wear resistance of the workpiece are improved.
Description
Technical field
The present invention relates to a kind of surface treatment method, relate in particular to a kind of surface fluorination protection method of stupalith workpiece.
Background technology
Along with the development of science and technology, now in the design of various products all towards quality gently, the target of heavily environmental protection strides forward, and therefore, selects for exploitation and the characteristic of product material, need to do the consideration of certain degree.Wherein the range of application with stupalith is the most extensive again,
At present in order to promote the solution of ceramic surface character, to adopt other material to be covered on the mode of ceramic surface mostly, by the stupalith that adds structural strength and the surface properties of pottery are carried out reinforcement, or employing spraying baking vanish mode, break off ceramic surface and contact with outside air, and reach oxidation resistant purpose.Yet the combination of this compound ceramic material has bubble between often can be because of stupalith and stupalith on making, and makes the problem that produces the bonding strength deficiency between stupalith and the stupalith.Also there is the problem that thermotolerance is inadequate, adherence is bad in compound ceramic material after completing simultaneously, the pottery that causes the surface to be covered with the compound ceramic layer is not good for the character of opposing abrasion yet, the problem that causes stupalith easily to be peeled off from stupalith.Spraying baking vanish method also has the problems referred to above, so will cause environmental pollution on its numerous and diverse technique.
Summary of the invention
Technical problem to be solved by this invention is to propose a kind of surface fluorination protection method of stupalith, be difficult for carrying out surface treatment in the anodizing mode so as to improvement prior art pottery, and the outer practice of covering a ceramic layer in the surface of prior art pottery, its ceramic layer easily and ceramic surface be separated, cause the problems such as the thermotolerance of prior art ceramic surface and wear resistant be unsatisfactory.
For achieving the above object, the surface fluorination protection method of stupalith disclosed in this invention, but at first be that the stupalith workpiece is inserted in the air tight housing, and vacuumize the oxygen level that reduces in the cavity; Then, pass into include fluorine mixed gas to cavity, stupalith workpiece surface and fluorine react, so the Surface Creation of workpiece and be coated with the monofluoride protective layer and utilize ultrasonic technique to take out ceramic surface impurity.。Wherein, the material of this stupalith workpiece is pottery or aluminium alloy, and the material of this fluorochemical protective layer that generates is respectively magnesium fluoride and aluminum fluoride.
Wherein, passing into this mixed gas to the step in this cavity that includes this fluorine is to carry out in a room temperature environment.
Wherein, in this cavity vacuumize reduce the step that oxygen level processes after, also include the step that heats this stupalith workpiece.
Wherein, the heated perimeter of this stupalith workpiece is that room temperature is between 300 degree approximately Celsius.
Wherein, this mixed gas includes this fluorine and an argon.
Wherein, to include volumn concentration be that this argon of 90% and volumn concentration are this fluorine of 10% to this mixed gas.
Wherein, this mixed gas includes this fluorine and a nitrogen.
Wherein, to include volumn concentration be that this nitrogen of 90% and volumn concentration are this fluorine of 10% to this mixed gas.
The surface fluorination protection method of stupalith of the present invention; generate fine and close fluorochemical protective layer by atmosphere control technique in the ceramic workpiece surface coverage; so as to the corrosion of the protection acid and alkali of workpiece own or alkali, significantly improve surface hardness and the abrasion performance character of workpiece simultaneously.Just fluoridize as example the volume of the volume/magnesium of its compacting factor=magnesium fluoride=(density of the weight/magnesium fluoride of magnesium fluoride)/(density of the weight/magnesium of magnesium)=(62.3018g/3.18g/cm take magnesium
3)/(24.305g/1.738g/cm
3)=1.401, mean magnesium fluoridize after volume can increase by 40%, this magnesium fluoride protective layer will be covered with whole workpiece surface, produce hardly again hydrolytic action in air, can be for a long time and effectively protect the surface of ceramic workpiece.And avoided the spraying baking finish process of not environmental protection.
Above about content of the present invention explanation and the explanation of following embodiment be in order to demonstration with explain principle of the present invention, and provide claim of the present invention further to explain.
Description of drawings
Fig. 1 is operation chart of the present invention;
Fig. 2 is the schematic diagram that ceramic workpiece surface coverage of the present invention has fluorochemical;
Wherein, Reference numeral:
100: the stupalith workpiece
200: cavity
210: worktable
220: vacuum pumps
300: fluorine
400: the fluorochemical protective layer
Embodiment
See also the surface fluorination method of the stupalith of Fig. 1 first embodiment of the invention, its step at first be with a stupalith workpiece 100 insert one can be airtight cavity 200 in (step 500), wherein stupalith workpiece 100 can directly be placed on the worktable 210, or stupalith workpiece 100 is hooked on one hangs on the tool (not shown), again stupalith workpiece 100 is positioned on the worktable 210 in the lump together with hanging tool, is not limited with the disposing way that the present embodiment was disclosed.Wherein, the material of stupalith workpiece 100 disclosed in this invention is pottery (Magnesium alloy) or aluminium alloy (Aluminum alloy), but those skilled in the art, also can select the alloy of other ceramic material as the workpiece for the treatment of that surface fluorination is processed, not be limited with the present embodiment.
Then, the vacuum pumps (vacuum pump) that is connected in cavity 200 vacuumizes cavity 200 and reduces oxygen level processing (step 510), arrives a default operating pressure to make the environmental stresss in the cavity 200.Then pass into the mixed gas that includes fluorine 300 to the cavity 200 (step 520), this mixed gas can be and includes fluorine 300 (fluorine, F) or argon (argon, Ar) mixed gas of (not shown), its blending ratio are that volume percent (vol.%) is that 90 argon and volume percent (vol.%) are 10 fluorine; Or, this mixed gas can be and includes fluorine 300 or nitrogen (nitrogen, N) mixed gas of (not shown), its blending ratio is that volume percent (vol.%) is that 90 nitrogen and volume percent (vol.%) are 10 fluorine, in other words, to include volumn concentration be that this nitrogen of 90% and volumn concentration are this fluorine of 10% to this mixed gas.
But be not limited to gaseous species and blending ratio that the present embodiment discloses.
It should be noted that, the step of the mixed gas that the passing into of the present embodiment includes fluorine 300 to the cavity 200, its cavity 200 inside remain on a room temperature environment (room temperature) and carry out operation, also are that the envrionment temperature of cavity 200 inside is carried out aeration step in 25 degree (25 ℃) Celsius.
Please continue to consult Fig. 1 and Fig. 2; be full of the mixed gas that includes fluorine 300 in the cavity 200; and keep certain working hour (being about tens of minutes); allow stupalith workpiece 100 and fluorine 300 react; therefore, in the Surface Creation of stupalith workpiece 100 and be coated with fine and close fluorochemical protective layer 400 (as shown in Figure 2).For example, if the material of stupalith workpiece 100 is pottery, the protective layer that itself and fluorine 300 reactions generate is magnesium fluoride (MgF
2), if the material of stupalith workpiece 100 is aluminium alloy, the protective layer that itself and fluorine 300 reactions generate is aluminum fluoride (AlF
3).
The surface fluorination method of the stupalith workpiece of another embodiment of the present invention, its step at first be with a stupalith workpiece 100 insert one can be airtight cavity 200 in (step 500), wherein stupalith workpiece 100 can directly be placed on the worktable 210, or stupalith workpiece 100 is hooked on one hangs on the tool (not shown), again stupalith workpiece 100 is positioned on the worktable 210 in the lump together with hanging tool, is not limited with the disposing way that the present embodiment was disclosed.Wherein, the material of stupalith workpiece 100 disclosed in this invention is pottery or aluminium alloy, but those skilled in the art also can select the alloy of other ceramic material as the workpiece for the treatment of that surface fluorination is processed, are not limited with the present embodiment.
Then, the vacuum pumps that is connected in cavity 200 vacuumizes cavity 200 and reduces oxygen level processing (step 510), arrives a default operating pressure to make the environmental stresss in the cavity 200.Follow heating ceramic material workpiece 100 to one preset temps (step 530), the step of its heating ceramic material workpiece 100 can be used the heating installation (not shown) of cavity 200, so that the stupalith workpiece 100 in the cavity 200 are heated.The heated perimeter of the stupalith workpiece 100 of the present embodiment is that room temperature (25 ℃) is between 300 degree (300 ℃) approximately Celsius.
See also Fig. 1 and Fig. 2, then pass into the mixed gas that includes fluorine 300 to the cavity 200 (step 520), this mixed gas can be and includes fluorine 300 or the mixed gas of argon (not shown), and its blending ratio is that volume percent (vol.%) is that 90 argon and volume percent (vol.%) are 10 fluorine; Or, this mixed gas can be and includes fluorine 300 or the mixed gas of nitrogen (not shown), its blending ratio is that volume percent (vol.%) is that 90 nitrogen molecule and volume percent (vol.%) are 10 fluorine, but is not limited to gaseous species and the blending ratio that the present embodiment discloses.The step of the mixed gas that the passing into of the present embodiment includes fluorine 300 to the cavity 200, its cavity 200 inside remain on the room temperature operation of ventilating to the envrionment temperature between 300 degree approximately Celsius.
Please continue to consult Fig. 1 and Fig. 2; be full of the mixed gas that includes fluorine 300 in the cavity 200 and keep certain working hour (being about tens of minutes); stupalith workpiece 100 reacts with fluorine 300, and in the Surface Creation of stupalith workpiece 100 and be coated with fine and close fluorochemical protective layer 400 (as shown in Figure 2).For example, if the material of stupalith workpiece 100 is pottery, the protective layer that itself and fluorine 300 reactions generate is magnesium fluoride (MgF
2), if the material of stupalith workpiece 100 is aluminium alloy, the protective layer that itself and fluorine 300 reactions generate is aluminum fluoride (AlF
3).
It should be noted that; the heated perimeter of the stupalith workpiece 100 of the present embodiment is that room temperature (25 ℃) is between 300 degree (300 ℃) approximately Celsius; so as to the speed of reaction of increase fluorine 300 with stupalith workpiece 100 surfaces, and then the thickness of increase fluorochemical protective layer 400.
The surface fluorination method of stupalith disclosed in this invention; to cover the fine and close fluorochemical protective layer of generation by atmosphere control technique in the stupalith workpiece surface; for example be magnesium fluoride or aluminum fluoride, with the corrosion of the protection acid and alkali of stupalith workpiece own or alkali.The fluorochemical protective layer that the present invention generates belongs to ceramic material, and therefore, the surface hardness of stupalith workpiece and abrasion performance character are greatly improved.
In addition, hydrolytic action can occur in fluorochemical protective layer of the present invention hardly, therefore, can be for a long time and effectively protect the surface of stupalith workpiece, prolong the work-ing life of stupalith workpiece and keep good surface properties.
Certainly; the present invention also can have other various embodiments; in the situation that do not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (9)
1. the surface fluorination protection method of a stupalith is characterized in that, may further comprise the steps:
With a stupalith workpiece insert one can be airtight cavity in;
This cavity is vacuumized the reduction oxygen level to be processed; And
Pass into include a fluorine a mixed gas to this cavity, this stupalith workpiece and this fluorine react, and in a Surface Creation of this stupalith workpiece and be coated with the monofluoride protective layer;
Utilize ultrasonic technique to take out ceramic surface impurity.
2. the surface fluorination protection method of stupalith according to claim 1 is characterized in that, the material of this stupalith workpiece is pottery or aluminium alloy, and the material of this fluorochemical protective layer that generates is respectively magnesium fluoride and aluminum fluoride.
3. the surface fluorination protection method of stupalith according to claim 1 is characterized in that, passing into this mixed gas to the step in this cavity that includes this fluorine is to carry out in a room temperature environment.
4. the surface fluorination protection method of stupalith according to claim 1 is characterized in that, in this cavity vacuumize reduce the step that oxygen level processes after, also include the step that heats this stupalith workpiece.
5. the surface fluorination protection method of stupalith according to claim 4 is characterized in that, the heated perimeter of this stupalith workpiece is that room temperature is between 300 degree approximately Celsius.
6. the surface fluorination protection method of stupalith according to claim 1 is characterized in that, this mixed gas includes this fluorine and an argon.
7. the surface fluorination protection method of stupalith according to claim 6 is characterized in that, it is that this argon of 90% and volumn concentration are this fluorine of 10% that this mixed gas includes volumn concentration.
8. the surface fluorination protection method of stupalith according to claim 1 is characterized in that, this mixed gas includes this fluorine and a nitrogen.
9. the surface fluorination protection method of stupalith according to claim 8 is characterized in that, it is that this nitrogen of 90% and volumn concentration are this fluorine of 10% that this mixed gas includes volumn concentration.
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|---|---|---|---|
| CN2012105957053A CN103044074A (en) | 2012-12-17 | 2012-12-17 | Surface fluorination protection method for ceramic material |
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|---|---|---|---|
| CN2012105957053A CN103044074A (en) | 2012-12-17 | 2012-12-17 | Surface fluorination protection method for ceramic material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113321509A (en) * | 2021-06-25 | 2021-08-31 | 中国科学院上海光学精密机械研究所 | Corrosion-resistant vent pipe for fluoride glass active atmosphere treatment |
-
2012
- 2012-12-17 CN CN2012105957053A patent/CN103044074A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113321509A (en) * | 2021-06-25 | 2021-08-31 | 中国科学院上海光学精密机械研究所 | Corrosion-resistant vent pipe for fluoride glass active atmosphere treatment |
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Application publication date: 20130417 |