CN101407422A - Sialon complex phase ceramic lift tube and production method thereof - Google Patents
Sialon complex phase ceramic lift tube and production method thereof Download PDFInfo
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- CN101407422A CN101407422A CNA2008101401117A CN200810140111A CN101407422A CN 101407422 A CN101407422 A CN 101407422A CN A2008101401117 A CNA2008101401117 A CN A2008101401117A CN 200810140111 A CN200810140111 A CN 200810140111A CN 101407422 A CN101407422 A CN 101407422A
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Abstract
The invention relates to a sialon composite ceramic lift tube and a preparation method thereof. The weight percents of the raw materials forming the composite ceramic lift tube are: 25-50 percent of silicon nitride, 15-30 percent of quartz, 5-20 percent of aluminum dioxide, 0.01-0.1 percent of yttria, 20-40 percent of carborundum, 1-10 percent of zirconia, 0.01-0.06 percent of acrylamide, 0.001-0.005 percent of N, N'-methylenebisacrylamide, 0.1-0.7 percent of polymethacrylic acid amine and 0.05-0.2 percent of ammonium persulfate. The preparation method comprises: adding pre-mix liquid to a ball mill in advance, adding the silicon nitride, the quartz, the yttria, the aluminum dioxide, the carborundum and zirconia in sequence and ball-milling for 15-30 hours; adding the ammonium persulfate to the sizing agent, vacuumizing by a vacuum agitator and injecting into a mold to be solidified; demolding, drying and sintering at the temperature of 1300-1600 DEG C to obtain the finished product. The sialon composite ceramic lift tube is characterized by long service life, high strength, strong thermal shock resistance and low cost, which is not infiltrated or reacted with aluminum melt.
Description
Technical field:
The present invention relates to riser pipe stupalith and preparation method field, specifically be a kind of Sialon complex phase ceramic lift tube (also claiming Sialon complex phase ceramic lift tube) and preparation method, its product mainly is applied to the key part on the air injection machine of producing car high-quality and safety structural part (for example: wheel hub, parts etc. travel) and engine structure spare (particularly automobile, motorcycle parts).
Background technology:
Twentieth century sixties, proposition along with the ceramic engine notion, countries in the world developments, exploitation ceramic new material have emerged large quantities of high performance structural stupaliths, are widely used in that metallurgy, chemical industry, automobile, aerospace etc. are civilian, fields such as industry and military project.Along with developing of automobile industry, advanced low-pressure casting process is applied to the key part on the air injection machine of high-quality and safety structural part (for example: wheel hub, parts etc. travel) and engine structure spare (particularly automobile, motorcycle parts) rapidly.As far back as the 60 to 70's of last century, the developed countries such as the U.S., Japan and Germany etc., promptly carried out the research of the riser pipe of various materials, cast iron riser pipe, stainless steel riser pipe, quartzy riser pipe and aluminium titanates riser pipe stage have been passed through, the aluminium titanates riser pipe of producing as Germany it is reported that be about 2 months its online normal work-ing life, also there are the situation of several days or tens days, about 6000 yuan of prices in indivedual life-spans.At present, high performance ceramic lift tube has all turned to Sialon or silicon nitride material, and the riser pipe of this kind material not only has with aluminum melt characteristics such as do not soak into, do not react; And compare with the aluminium titanates riser pipe with quartzy, have the intensity height, the anti-thermal shock ability is strong, does not in use fall slag, long service life etc., can increase substantially the quality of foundry goods.The riser pipe of such material has only the U.S. and Japan to produce abroad at present, about 1.2 ten thousand yuans of its import price, and be about three months work-ing life.
Comparatively speaking, China adopts the low-pressure casting technology to start late, and has equally also experienced from cast iron riser pipe, stainless steel riser pipe, quartzy riser pipe and to stage of aluminium titanates riser pipe.What present domestic great majority adopted is quartzy riser pipe and aluminium titanates riser pipe, the riser pipe of this two classes material because itself material, be easy to during high temperature crystallization or with aluminum solutions generation redox reaction, thereby cause have only tens days online work-ing life, the longest ability one wheat harvesting period.For a long time, domestic research to riser pipe has all focused on how to improve the performance of aluminium titanates and on work-ing life, and for high performance other materials of exploitation, domestic also have only a few R﹠D institution to study, reaction sintering silicon nitride based on silicon carbide riser pipe as Northwestern Polytechnical University's development, obtain some progress at present, but also do not had mass production.
Summary of the invention:
Purpose of the present invention is exactly at the existing in prior technology defective, and a kind of Sialon complex phase ceramic lift tube and preparation method are provided.This method is by adopting advanced gel-casting technology, becoming the atmosphere quick sintering technology of ultra, reaches good product performance, cost is low.
Technical scheme comprises:
(1) weight percent of the raw material of complex phase ceramic lift tube composition and various raw materials is: silicon nitride 25%-50%, quartzy 15%-30%, aluminium dioxide 5%-20%, yttrium oxide 0.01%-0.1%, silicon carbide 20%-40%, zirconium white 1%-10%, acrylamide 0.01%-0.06%, N, N '-methylene-bisacrylamide 0.001%-0.005%, polymethyl acid amide 0.1%-0.7%, Ammonium Persulfate 98.5 0.05%-0.2%.
(2) preparation method who adopts above-mentioned raw materials to carry out complex phase ceramic lift tube is employing near net-shape injectiong coagulation shaping technology, and process wet ball grinding, injection molding, curing, depanning, drying and firing process make.Wherein: wet ball grinding is to add deionized water, acrylamide and N in ball mill in advance, N '-methylene-bisacrylamide is as premixed liquid, wherein to account for the weight percent of whole raw materials be 22%-40% to the deionized water add-on, the back added silicon nitride, quartz and yttrium oxide ball milling 3-5 hour, add aluminium dioxide, silicon carbide and zirconium white again and carry out ball milling, ball milling total time is 15-30 hour, goes out mill and detects granularity＜3.0 micron.
Injection molding is with the slurry behind the ball milling, and the vacuum mixer of packing into adds Ammonium Persulfate 98.5, vacuumizes, and gets rid of gas, is squeezing in the mould under 0.8-1.2kg pressure with vacuum mixer then.Curing is depanning after solidifying 5-10 minute under 50 ℃ of-80 ℃ of temperature condition.Drying is at 50%-70%RH environment inner drying in 20 ℃-40 ℃ of temperature, humidity.Burning till is 1300 ℃-1600 ℃ of temperature, and firing atmosphere is that oxidation becomes under the condition of nitriding atmosphere stoking 15-30 hour.In the wet ball grinding link of such scheme, in order to keep the good flowability of slurry, the pH value of regulating slurry by ammoniacal liquor is 3～5.
Product of the present invention and similar products at home and abroad relatively have following characteristics: (1) its work-ing life is all above 3 months, apparently higher than domestic like product, be traditional riser pipe 3-8 doubly; (2) compare with traditional cast iron riser pipe, have with aluminum melt and advantage such as do not soak into, do not react; (3) compare with the aluminium titanates riser pipe with quartzy, have the intensity height, the anti-thermal shock ability is strong, does not in use fall outstanding features such as slag, long service life; (4) price is lower than external like product 1/3-1/2.Preparation method provided by the invention has easy handling, technology is simple, and product processed is stable and reliable for performance.
Embodiment:
Embodiment 1, the raw material of complex phase ceramic lift tube is formed and the weight percent of various raw materials is: silicon nitride 35%, quartz 20%, aluminium dioxide 14%, yttrium oxide 0.05%, silicon carbide 25%, zirconium white 5.2%, acrylamide 0.048%, N, N '-methylene-bisacrylamide 0.002%, polymethyl acid amide 0.6%, Ammonium Persulfate 98.5 0.1%.
Embodiment 2, the raw material of complex phase ceramic lift tube is formed and the weight percent of various raw materials is: silicon nitride 40%, quartz 18%, aluminium dioxide 10%, yttrium oxide 0.05, silicon carbide 25, zirconium white 6.2%, acrylamide 0.048%, N, N '-methylene-bisacrylamide 0.002%, polymethyl acid amide 0.6%, Ammonium Persulfate 98.5 0.1%.
On the basis of above-mentioned raw materials proportioning, utilize prior preparation method through wet ball grinding, injection molding, curing, depanning, drying and firing process, can make the ceramic lift tube of superior performance.
Embodiment 3, form at the raw material of embodiment 1, and the preparation method who carries out complex phase ceramic lift tube makes through wet ball grinding, injection molding, curing, depanning, drying and firing process for adopting the near net-shape injectiong coagulation shaping technology.Wherein: wet ball grinding is to add deionized water, acrylamide and N in ball mill in advance, N '-methylene-bisacrylamide is as premixed liquid, wherein to account for the weight percent of whole raw materials be 30% to the deionized water add-on, the back added silicon nitride, quartz and yttrium oxide ball milling 3-5 hour, add aluminium dioxide, silicon carbide and zirconium white again and carry out ball milling, ball milling total time is 15-30 hour.Go out mill and detect granularity＜3.0 micron.Injection molding is with the slurry behind the ball milling, and the vacuum mixer of packing into adds Ammonium Persulfate 98.5, vacuumizes, and gets rid of gas, is squeezing in the mould under 1kg pressure with vacuum mixer then.Curing is depanning after solidifying 8 minutes under 60 ℃ of temperature condition.Drying is at 60%RH environment inner drying in 30 ℃ of temperature, humidity.Burning till is 1500 ℃ of temperature, and firing atmosphere is that oxidation becomes under the condition of nitriding atmosphere stoking 20 hours.In the wet ball grinding link, in order to keep the good flowability of slurry, the pH value of regulating slurry by ammoniacal liquor is 5.
Embodiment 4, form at the raw material of embodiment 2, and the preparation method who carries out complex phase ceramic lift tube makes through wet ball grinding, injection molding, curing, depanning, drying and firing process for adopting the near net-shape injectiong coagulation shaping technology.Wherein: wet ball grinding is to add deionized water, acrylamide and N in ball mill in advance, N '-methylene-bisacrylamide is as premixed liquid, wherein to account for the weight percent of whole raw materials be 40% to the deionized water add-on, the back added silicon nitride, quartz and yttrium oxide ball milling 5 hours, add aluminium dioxide, silicon carbide and zirconium white again and carry out ball milling, ball milling total time is 25 hours, goes out mill and detects granularity＜3.0 micron.Injection molding is with the slurry behind the ball milling, and the vacuum mixer of packing into adds Ammonium Persulfate 98.5, vacuumizes, and gets rid of gas, is squeezing in the mould under 0.8kg pressure with vacuum mixer then.Curing is depanning after solidifying 6 minutes under 80 ℃ of temperature condition.Drying is at 50%RH environment inner drying in 40 ℃ of temperature, humidity.Burning till is 1300 ℃ of temperature, and firing atmosphere is that oxidation becomes under the condition of nitriding atmosphere stoking 25 hours.
Product performance detected result: volume density 3G/cm
3, void content＜10%, bending strength 〉=120Mpa.
Claims (3)
1, a kind of Sialon complex phase ceramic lift tube is characterized in that: raw material is formed and the weight percent of various raw materials is: silicon nitride 25%-50%, quartzy 15%-30%, aluminium dioxide 5%-20%, yttrium oxide 0.01%-0.1%, silicon carbide 20%-40%, zirconium white 1%-10%, acrylamide 0.01%-0.06%, N, N '-methylene-bisacrylamide 0.001%-0.005%, polymethyl acid amide 0.1%-0.7%, Ammonium Persulfate 98.5 0.05%-0.2%.
2, the preparation method of Sialon complex phase ceramic lift tube according to claim 1, be the near net-shape injectiong coagulation shaping technology, make through wet ball grinding, injection molding, curing, depanning, drying and firing process, it is characterized in that: wet ball grinding is to add deionized water, acrylamide and N in ball mill in advance, N '-methylene-bisacrylamide is as premixed liquid, the back added silicon nitride, quartz and yttrium oxide ball milling 3-5 hour, add aluminium dioxide, silicon carbide and zirconium white again and carry out ball milling, ball milling total time is 15-30 hour, goes out mill and detects granularity＜3.0 micron; Injection molding is with the slurry behind the ball milling, and the vacuum mixer of packing into adds Ammonium Persulfate 98.5, vacuumizes, and gets rid of gas, is squeezing in the mould under 0.8-1.2kg pressure with vacuum mixer then; Curing is depanning after solidifying 5-10 minute under 50 ℃ of-80 ℃ of temperature condition; Drying is at 50%-70%RH environment inner drying in 20 ℃-40 ℃ of temperature, humidity; Burning till is 1300 ℃-1600 ℃ of temperature, and firing atmosphere is that oxidation becomes under the condition of nitriding atmosphere stoking 15-30 hour.
3, the preparation method of Sialon complex phase ceramic lift tube according to claim 2, it is characterized in that: in the wet ball grinding link of such scheme, the weight percent that the deionized water add-on accounts for whole raw materials is 22%-40%, and the pH value of regulating slurry by ammoniacal liquor is 3～5.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973765A (en) * | 2010-09-15 | 2011-02-16 | 山东理工大学 | Preparation method of metallurgical cast ceramic catheter |
| CN102010208A (en) * | 2010-09-15 | 2011-04-13 | 山东理工大学 | Preparation method of silicon ingot linear cutting waste ceramic guide pipe |
| CN101654363B (en) * | 2009-08-25 | 2012-01-18 | 山东理工大学 | Preparation method of ceramic split flow flange of isothermal gradient heat exchanger |
| CN105964979A (en) * | 2016-07-12 | 2016-09-28 | 安阳恒安电机有限公司 | Airproof high-temperature-resistant corrosion-resistant molten aluminum lifting pipe and compositions thereof |
| CN110156470A (en) * | 2019-06-25 | 2019-08-23 | 东营新科信特陶有限责任公司 | The preparation method of M- Sialon combined silicon carbide ceramic lift tube |
| CN110272284A (en) * | 2019-06-25 | 2019-09-24 | 东营新科信特陶有限责任公司 | The preparation method of Sialon combined silicon carbide ceramic lift tube |
-
2008
- 2008-08-08 CN CNA2008101401117A patent/CN101407422A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101654363B (en) * | 2009-08-25 | 2012-01-18 | 山东理工大学 | Preparation method of ceramic split flow flange of isothermal gradient heat exchanger |
| CN101973765A (en) * | 2010-09-15 | 2011-02-16 | 山东理工大学 | Preparation method of metallurgical cast ceramic catheter |
| CN102010208A (en) * | 2010-09-15 | 2011-04-13 | 山东理工大学 | Preparation method of silicon ingot linear cutting waste ceramic guide pipe |
| CN101973765B (en) * | 2010-09-15 | 2013-01-02 | 山东理工大学 | Preparation method of metallurgical cast ceramic catheter |
| CN102010208B (en) * | 2010-09-15 | 2013-02-13 | 山东理工大学 | Preparation method of silicon ingot linear cutting waste ceramic guide pipe |
| CN105964979A (en) * | 2016-07-12 | 2016-09-28 | 安阳恒安电机有限公司 | Airproof high-temperature-resistant corrosion-resistant molten aluminum lifting pipe and compositions thereof |
| CN105964979B (en) * | 2016-07-12 | 2017-11-10 | 安阳恒安电机有限公司 | A kind of air tight high-temperature-resistant and anti-corrosion aluminum melt stalk |
| CN110156470A (en) * | 2019-06-25 | 2019-08-23 | 东营新科信特陶有限责任公司 | The preparation method of M- Sialon combined silicon carbide ceramic lift tube |
| CN110272284A (en) * | 2019-06-25 | 2019-09-24 | 东营新科信特陶有限责任公司 | The preparation method of Sialon combined silicon carbide ceramic lift tube |
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