CN105732009A - Self-lubrication aluminum oxide ceramic sealing material for machines and preparing method of self-lubrication aluminum oxide ceramic sealing material - Google Patents
Self-lubrication aluminum oxide ceramic sealing material for machines and preparing method of self-lubrication aluminum oxide ceramic sealing material Download PDFInfo
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Abstract
The invention discloses a self-lubrication aluminum oxide ceramic sealing material for machines and a preparing method of the self-lubrication aluminum oxide ceramic sealing material. The material is prepared from, by weight, 65-88 parts of aluminum oxide, 8-14 parts of hexagonal boron nitride, 5-9 parts of calcium stearate, 5-9 parts of barium sulfate, 4-7 parts of zirconium oxide, 0.8-1.4 parts of yttrium oxide, 1.5-2.2 parts of bismuth oxide, 3-6 parts of titanium oxide and 3-5 parts of polyvinyl alcohol, and is prepared through raw material mixing, spray granulation, compression molding, vacuum sintering and processing. According to the prepared self-lubrication aluminum oxide ceramic sealing material for machines, the density ranges from 3.3 g/cm<3> to 3.6 g/cm<3>, the HRA hardness ranges from 80 to 85, the three-point bending strength ranges from 260 MPa to 315 MPa, and the friction coefficient ranges from 0.22 to 0.28. Abrasion and even cracking, caused by overlarge suction force of the two sealing end faces of a movable ring and a static ring, of a sealing piece can be avoided, and the service life of a product is greatly prolonged.
Description
Technical field
The present invention relates to mechanical material technical field, specifically a kind of machinery self-lubricating aluminium oxide ceramics encapsulant and system thereof
Preparation Method.
Background technology
Aluminium oxide ceramics is a kind of with aluminium oxide (Al2O3) it is the ceramic material of main body, for thick film integrated circuit.Aluminium oxide
Pottery has preferable conductivity, mechanical strength and heat-resisting quantity.It should be noted that and need to wash with ultrasound wave.Aluminium oxide
Pottery is a kind of broad-spectrum pottery, because its superior performance, more extensive in the application of modern society, full
It is sufficient to daily and property needs.
Aluminium oxide ceramics sealing member is to use the moulding processs such as cast, hot pressing, dry-pressing to be made, and can mirror finish process,
Precision is up to ± 0.01, and mechanical strength is high, wear resistance at elevated temperature is good, resistance to chemical corrosion is strong, air-tightness is good, and temperature is dashed forward
During change waterproof, for mechanical seal and the motion seal of various piston type domestic water pumps, agricultural pump and other chemical pump, full well
Foot sliding capability and sealing property two aspect requirement under practical service environment, can be widely used for metallurgy, machinery, chemical industry,
The industry mechanical sealing parts such as medicine, food, noncorrosive pump, automobile, pneumatic element.
Due to aluminium oxide ceramics sealing member in use, rotating ring and stationary ring two seal face flatness are the highest, easily produce
Raw adhesive phenomenon, under static state during starting device, owing to the suction-combining force of rotating ring and stationary ring two seal face is very big, easily
Make sealing member produce abrasion even to rupture, thus affect the service life of product.
Summary of the invention
It is an object of the invention to provide a kind of machinery self-lubricating aluminium oxide ceramics encapsulant and preparation method thereof, solve
Due to the suction-combining force of rotating ring and the stationary ring two seal face excessive sealing part abrasion caused even breakage problem.
For achieving the above object, the present invention provides following technical scheme:
A kind of machinery self-lubricating aluminium oxide ceramics encapsulant, in parts by weight, is made up of following raw material: aluminium oxide
65-88 part, hexagonal boron nitride 8-14 part, calcium stearate 5-9 part, barium sulfate 5-9 part, zirconium oxide 4-7 part, yittrium oxide
0.8-1.4 part, bismuth oxide 1.5-2.2 part, titanium oxide 3-6 part, polyvinyl alcohol 3-5 part.
As the further scheme of the present invention: in parts by weight, it is made up of following raw material: aluminium oxide 69-74 part, six
Side boron nitride 10-13 part, calcium stearate 6-8 part, barium sulfate 5-7 part, zirconium oxide 4-6 part, yittrium oxide 0.9-1.3 part,
Bismuth oxide 1.6-2.0 part, titanium oxide 3.5-4.8 part, polyvinyl alcohol 3.5-4.5 part.
As the further scheme of the present invention: in parts by weight, it is made up of following raw material: aluminium oxide 72 parts, six sides
Boron nitride 12 parts, calcium stearate 7 parts, 6 parts of barium sulfate, zirconium oxide 5 parts, yittrium oxide 1.2 parts, bismuth oxide 1.8 parts,
Titanium oxide 4.2 parts, polyvinyl alcohol 4 parts.
As the further scheme of the present invention: the particle diameter of described hexagonal boron nitride is 5-10 μm, purity is more than 95%.
The preparation method of described machinery self-lubricating aluminium oxide ceramics encapsulant, comprises the following steps:
(1) mixing of raw material: weigh each raw material by above-mentioned parts by weight, put in batch mixer add pure water carry out wet method mix
Close 12-20h, cross 80-100 mesh sieve, obtain slip；
(2) mist projection granulating: slip is carried out pelletize by mist projection granulating tower, mist projection granulating tower inlet temperature 180-260 DEG C,
Outlet temperature 60-120 DEG C, the premixing flour 60-180 mesh sieve after pelletize sieves, and the premixing flour pine produced fills close
Degree reaches 0.92-0.95g/cm3, mobility reaches 8-11s/30g；
(3) compression molding: choose mould according to required article shape, loads above-mentioned premixing flour in mold cavity, first with
120-160MPa pressure carries out molding preforming, then carries out isostatic pressed with 250-280MPa pressure, obtains blank；
(4) vacuum-sintering: blank above-mentioned steps prepared, puts into and carries out vacuum-sintering in vacuum sintering furnace, sintering
Step is: blank loads vacuum-sintering furnace rear, and sintering furnace is carried out evacuation, when vacuum reaches 0.032-0.040Pa
After, in sintering furnace, logical nitrogen heats to normal pressure；Wherein, heating curves is: first with the speed of 1-2 DEG C/min
It is warming up to 950 DEG C, and is incubated 0.5-1h；Then with the ramp of 2-2.5 DEG C/min to 1650-1720 DEG C, and it is incubated
4-5h, afterwards furnace cooling, be down to room temperature and come out of the stove；
(5) processing: the blank after above-mentioned vacuum-sintering is processed, obtains described machinery self-lubricating aluminium oxide ceramics
Sealing member finished product.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention is with aluminium oxide as matrix, with hexagonal boron nitride, calcium stearate, barium sulfate as lubricant, with bismuth oxide for burning
Knot auxiliary agent, with polyvinyl alcohol as binding agent, prepares a kind of machinery with from profit through wet-mixed, pelletize, compacting, vacuum-sintering
Sliding aluminium oxide ceramics encapsulant, the density of this material is 3.3-3.6g/cm3, HRA hardness 80-85, three-point bending resistance intensity be
260-315MPa, coefficient of friction is 0.22-0.28, illustrates that this material has self lubricity, can avoid due to rotating ring and quiet
The excessive sealing part abrasion caused of the suction-combining force of ring two seal face even ruptures, and substantially prolongs the service life of product.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, aobvious
So, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, all
Belong to the scope of protection of the invention.
Embodiment 1
In the embodiment of the present invention, a kind of machinery self-lubricating aluminium oxide ceramics encapsulant, in parts by weight, by following
Raw material is made: aluminium oxide 65 parts, hexagonal boron nitride 14 parts, calcium stearate 5 parts, 9 parts of barium sulfate, zirconium oxide 4 parts,
Yittrium oxide 1.4 parts, bismuth oxide 1.5 parts, titanium oxide 6 parts, polyvinyl alcohol 3 parts；The particle diameter of hexagonal boron nitride is 5-10
μm, purity is more than 95%.
The preparation method of described machinery self-lubricating aluminium oxide ceramics encapsulant, comprises the following steps:
(1) mixing of raw material: weigh each raw material by above-mentioned parts by weight, put in batch mixer add pure water carry out wet method mix
Close 20h, cross 80-100 mesh sieve, obtain slip；
(2) mist projection granulating: slip is carried out pelletize, mist projection granulating tower inlet temperature 260 DEG C, outlet by mist projection granulating tower
Temperature 120 DEG C, the premixing flour 60-180 mesh sieve after pelletize sieves, and the premixing flour apparent density produced reaches
0.92-0.95g/cm3, mobility reaches 8-11s/30g；
(3) compression molding: choose mould according to required article shape, loads above-mentioned premixing flour in mold cavity, first with
160MPa pressure carries out molding preforming, then carries out isostatic pressed with 280MPa pressure, obtains blank；
(4) vacuum-sintering: blank above-mentioned steps prepared, puts into and carries out vacuum-sintering in vacuum sintering furnace, sintering
Step is: blank loads vacuum-sintering furnace rear, and sintering furnace is carried out evacuation, after vacuum reaches 0.040Pa, to
In sintering furnace, logical nitrogen heats to normal pressure；Wherein, heating curves is: first with the ramp of 2 DEG C/min extremely
950 DEG C, and it is incubated 1h；Then with the ramp of 2.5 DEG C/min to 1720 DEG C, and it is incubated 5h, furnace cooling afterwards,
It is down to room temperature come out of the stove；
(5) processing: the blank after above-mentioned vacuum-sintering is processed, obtains described machinery self-lubricating aluminium oxide ceramics
Sealing member finished product.
Embodiment 2
In the embodiment of the present invention, a kind of machinery self-lubricating aluminium oxide ceramics encapsulant, in parts by weight, by following
Raw material is made: aluminium oxide 88 parts, hexagonal boron nitride 8 parts, calcium stearate 9 parts, 5 parts of barium sulfate, zirconium oxide 7 parts,
Yittrium oxide 0.8 part, bismuth oxide 2.2 parts, titanium oxide 3 parts, polyvinyl alcohol 5 parts；The particle diameter of hexagonal boron nitride is 5-10
μm, purity is more than 95%.
The preparation method of described machinery self-lubricating aluminium oxide ceramics encapsulant is same as in Example 3.
Embodiment 3
In the embodiment of the present invention, a kind of machinery self-lubricating aluminium oxide ceramics encapsulant, in parts by weight, by following
Raw material is made: aluminium oxide 69 parts, hexagonal boron nitride 13 parts, calcium stearate 6 parts, 7 parts of barium sulfate, zirconium oxide 4 parts,
Yittrium oxide 1.3 parts, bismuth oxide 1.6 parts, titanium oxide 4.8 parts, polyvinyl alcohol 3.5 parts；The particle diameter of hexagonal boron nitride is 5-10
μm, purity is more than 95%.
The preparation method of described machinery self-lubricating aluminium oxide ceramics encapsulant, comprises the following steps:
(1) mixing of raw material: weigh each raw material by above-mentioned parts by weight, put in batch mixer add pure water carry out wet method mix
Close 12h, cross 80-100 mesh sieve, obtain slip；
(2) mist projection granulating: slip is carried out pelletize, mist projection granulating tower inlet temperature 180 DEG C, outlet by mist projection granulating tower
Temperature 60 C, the premixing flour 60-180 mesh sieve after pelletize sieves, and the premixing flour apparent density produced reaches
0.92-0.95g/cm3, mobility reaches 8-11s/30g；
(3) compression molding: choose mould according to required article shape, loads above-mentioned premixing flour in mold cavity, first with
120MPa pressure carries out molding preforming, then carries out isostatic pressed with 250MPa pressure, obtains blank；
(4) vacuum-sintering: blank above-mentioned steps prepared, puts into and carries out vacuum-sintering in vacuum sintering furnace, sintering
Step is: blank loads vacuum-sintering furnace rear, and sintering furnace is carried out evacuation, after vacuum reaches 0.032Pa, to
In sintering furnace, logical nitrogen heats to normal pressure；Wherein, heating curves is: first with the ramp of 1 DEG C/min extremely
950 DEG C, and it is incubated 0.5h；Then with the ramp of 2 DEG C/min to 1650 DEG C, and it is incubated 4h, furnace cooling afterwards,
It is down to room temperature come out of the stove；
(5) processing: the blank after above-mentioned vacuum-sintering is processed, obtains described machinery self-lubricating aluminium oxide ceramics
Sealing member finished product.
Embodiment 4
In the embodiment of the present invention, a kind of machinery self-lubricating aluminium oxide ceramics encapsulant, in parts by weight, by following
Raw material is made: aluminium oxide 74 parts, hexagonal boron nitride 10 parts, calcium stearate 8 parts, 5 parts of barium sulfate, zirconium oxide 6 parts,
Yittrium oxide 0.9 part, bismuth oxide 2.0 parts, titanium oxide 3.5 parts, polyvinyl alcohol 4.5 parts；The particle diameter of hexagonal boron nitride is 5-10
μm, purity is more than 95%.
Embodiment 5
In the embodiment of the present invention, a kind of machinery self-lubricating aluminium oxide ceramics encapsulant, in parts by weight, by following
Raw material is made: aluminium oxide 72 parts, hexagonal boron nitride 12 parts, calcium stearate 7 parts, 6 parts of barium sulfate, zirconium oxide 5 parts,
Yittrium oxide 1.2 parts, bismuth oxide 1.8 parts, titanium oxide 4.2 parts, polyvinyl alcohol 4 parts；The particle diameter of hexagonal boron nitride is 5-10
μm, purity is more than 95%.
The preparation method of described machinery self-lubricating aluminium oxide ceramics encapsulant, comprises the following steps:
(1) mixing of raw material: weigh each raw material by above-mentioned parts by weight, put in batch mixer add pure water carry out wet method mix
Close 16h, cross 80-100 mesh sieve, obtain slip；
(2) mist projection granulating: slip is carried out pelletize, mist projection granulating tower inlet temperature 220 DEG C, outlet by mist projection granulating tower
Temperature 80 DEG C, the premixing flour 60-180 mesh sieve after pelletize sieves, and the premixing flour apparent density produced reaches
0.92-0.95g/cm3, mobility reaches 8-11s/30g；
(3) compression molding: choose mould according to required article shape, loads above-mentioned premixing flour in mold cavity, first with
140MPa pressure carries out molding preforming, then carries out isostatic pressed with 260MPa pressure, obtains blank；
(4) vacuum-sintering: blank above-mentioned steps prepared, puts into and carries out vacuum-sintering in vacuum sintering furnace, sintering
Step is: blank loads vacuum-sintering furnace rear, and sintering furnace is carried out evacuation, after vacuum reaches 0.037Pa, to
In sintering furnace, logical nitrogen heats to normal pressure；Wherein, heating curves is: first with the ramp of 1.5 DEG C/min extremely
950 DEG C, and it is incubated 1h；Then with the ramp of 2 DEG C/min to 1680 DEG C, and it is incubated 5h, furnace cooling afterwards, fall
Come out of the stove to room temperature；
(5) processing: the blank after above-mentioned vacuum-sintering is processed, obtains described machinery self-lubricating aluminium oxide ceramics
Sealing member finished product.
The performance of table 1 each embodiment material
The sealing member finished product preparing above-described embodiment carries out performance test, and test result is as shown in table 1.Can by data in table
To find out, the density of the machinery self-lubricating aluminium oxide ceramics encapsulant that the present invention prepares is 3.3-3.6g/cm3, HRA hard
Degree 80-85, three-point bending resistance intensity are 260-315MPa, and coefficient of friction is 0.22-0.28, illustrates that this material has self-lubricating
Property, can avoid even rupturing due to the excessive sealing part abrasion caused of the suction-combining force of rotating ring and stationary ring two seal face, significantly
Extend the service life of product.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and do not carrying on the back
In the case of the spirit or essential attributes of the present invention, it is possible to realize the present invention in other specific forms.Therefore, no matter from
From the point of view of which point, all should regard embodiment as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all by fall in the implication of equivalency and scope of claim
Change is included in the present invention.
Although moreover, it will be appreciated that this specification is been described by according to embodiment, but the most each embodiment only comprises
One independent technical scheme, this narrating mode of description is only the most for clarity sake, and those skilled in the art should be by
Description is as an entirety, and the technical scheme in each embodiment can also be through appropriately combined, and forming those skilled in the art can
With other embodiments understood.
Claims (5)
1. a machinery self-lubricating aluminium oxide ceramics encapsulant, it is characterised in that in parts by weight, by following former
Material is made: aluminium oxide 65-88 part, hexagonal boron nitride 8-14 part, calcium stearate 5-9 part, barium sulfate 5-9 part, oxidation
Zirconium 4-7 part, yittrium oxide 0.8-1.4 part, bismuth oxide 1.5-2.2 part, titanium oxide 3-6 part, polyvinyl alcohol 3-5 part.
Machinery self-lubricating aluminium oxide ceramics encapsulant the most according to claim 1, it is characterised in that according to weight
Number meter, is made up of following raw material: aluminium oxide 69-74 part, hexagonal boron nitride 10-13 part, calcium stearate 6-8 part, sulfur
Acid barium 5-7 part, zirconium oxide 4-6 part, yittrium oxide 0.9-1.3 part, bismuth oxide 1.6-2.0 part, titanium oxide 3.5-4.8 part,
Polyvinyl alcohol 3.5-4.5 part.
Machinery self-lubricating aluminium oxide ceramics encapsulant the most according to claim 1, it is characterised in that according to weight
Number meter, is made up of following raw material: aluminium oxide 72 parts, hexagonal boron nitride 12 parts, calcium stearate 7 parts, 6 parts of barium sulfate,
Zirconium oxide 5 parts, yittrium oxide 1.2 parts, bismuth oxide 1.8 parts, titanium oxide 4.2 parts, polyvinyl alcohol 4 parts.
4. according to the arbitrary described machinery self-lubricating aluminium oxide ceramics encapsulant of claim 1-3, it is characterised in that institute
The particle diameter of the hexagonal boron nitride stated is 5-10 μm, and purity is more than 95%.
The preparation method of machinery self-lubricating aluminium oxide ceramics encapsulant the most according to claim 4, it is characterised in that
Comprise the following steps:
(1) mixing of raw material: weigh each raw material by above-mentioned parts by weight, put in batch mixer add pure water carry out wet method mix
Close 12-20h, cross 80-100 mesh sieve, obtain slip；
(2) mist projection granulating: slip is carried out pelletize by mist projection granulating tower, mist projection granulating tower inlet temperature 180-260 DEG C,
Outlet temperature 60-120 DEG C, the premixing flour 60-180 mesh sieve after pelletize sieves, and the premixing flour pine produced fills close
Degree reaches 0.92-0.95g/cm3, mobility reaches 8-11s/30g；
(3) compression molding: choose mould according to required article shape, loads above-mentioned premixing flour in mold cavity, first with
120-160MPa pressure carries out molding preforming, then carries out isostatic pressed with 250-280MPa pressure, obtains blank；
(4) vacuum-sintering: blank above-mentioned steps prepared, puts into and carries out vacuum-sintering in vacuum sintering furnace, sintering
Step is: blank loads vacuum-sintering furnace rear, and sintering furnace is carried out evacuation, when vacuum reaches 0.032-0.040Pa
After, in sintering furnace, logical nitrogen heats to normal pressure；Wherein, heating curves is: first with the speed of 1-2 DEG C/min
It is warming up to 950 DEG C, and is incubated 0.5-1h；Then with the ramp of 2-2.5 DEG C/min to 1650-1720 DEG C, and it is incubated
4-5h, afterwards furnace cooling, be down to room temperature and come out of the stove；
(5) processing: the blank after above-mentioned vacuum-sintering is processed, obtains described machinery self-lubricating aluminium oxide ceramics
Sealing member finished product.
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|---|---|---|---|
| CN201610097786.2A CN105732009A (en) | 2016-02-23 | 2016-02-23 | Self-lubrication aluminum oxide ceramic sealing material for machines and preparing method of self-lubrication aluminum oxide ceramic sealing material |
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|---|---|---|---|
| CN201610097786.2A CN105732009A (en) | 2016-02-23 | 2016-02-23 | Self-lubrication aluminum oxide ceramic sealing material for machines and preparing method of self-lubrication aluminum oxide ceramic sealing material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108467275A (en) * | 2016-04-08 | 2018-08-31 | 陈玉玲 | A kind of self-lubrication ceramic bearing |
| CN108892489A (en) * | 2018-06-25 | 2018-11-27 | 河津市锦浩特种陶瓷有限公司 | Easy fired high alumina ceramic and preparation method thereof |
| CN112594310A (en) * | 2020-12-29 | 2021-04-02 | 山东金力新材料科技股份有限公司 | Preparation method of ceramic alloy composite wear-resistant material for brake pad |
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2016
- 2016-02-23 CN CN201610097786.2A patent/CN105732009A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 王芬等: "Al2O3/hBN自润滑复合材料的制备及显微结构分析", 《宇航材料工艺》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108467275A (en) * | 2016-04-08 | 2018-08-31 | 陈玉玲 | A kind of self-lubrication ceramic bearing |
| CN108892489A (en) * | 2018-06-25 | 2018-11-27 | 河津市锦浩特种陶瓷有限公司 | Easy fired high alumina ceramic and preparation method thereof |
| CN112594310A (en) * | 2020-12-29 | 2021-04-02 | 山东金力新材料科技股份有限公司 | Preparation method of ceramic alloy composite wear-resistant material for brake pad |
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Application publication date: 20160706 |