CN102358701B - Preparation method of ceramic wiper plate - Google Patents
Preparation method of ceramic wiper plate Download PDFInfo
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- CN102358701B CN102358701B CN 201110168175 CN201110168175A CN102358701B CN 102358701 B CN102358701 B CN 102358701B CN 201110168175 CN201110168175 CN 201110168175 CN 201110168175 A CN201110168175 A CN 201110168175A CN 102358701 B CN102358701 B CN 102358701B
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Abstract
The invention provides a preparation method of a ceramic wiper plate, and comprises the steps of ceramic pug material preparation, moulding, solidification, sintering, and polishing. The method is characterized by consisting of: mixing silicon carbide powder, graphite powder, carbon black, phenolic resin and liquid paraffin, and subjecting the mixture to mulling in a vacuum pug mill so as to prepare a ceramic plastic pug material, conducting extrusion moulding to the ceramic plastic pug material, and cutting the material into an extrusion moulding green body, then carrying out curing to prepare a ceramic wiper plate green body, and performing sintering and polishing, thus obtaining the ceramic wiper plate. The ceramic wiper plate prepared in the invention is used for the papermaking industry, and a single wiper plate is free of splicing seams. Characterized by high surface fineness, great hardness and high strength, the ceramic wiper plate prepared in the invention avoids the defect of uneven splicing seams in ordinary ceramic wiper plates. With high production efficiency, the preparation method of the invention can be used for continuous mass production.
Description
Technical field
The present invention relates to a kind of preparation method of ceramic wiper plate, belong to the ceramics processing field.
Background technology
The ceramic wiper plate at present main aluminum oxide injection forming technology that adopts is produced, its shortcoming is that alumina material hardness is lower, wear resistance is relatively poor, and the length of single-piece Wiper blade little (about 10 centimetres) complex production process, the splicing seams unfairness, production efficiency is low, manual operation, floor space is large, and product performance are unstable.
Summary of the invention
The object of the present invention is to provide a kind of preparation method that can overcome defects, adopt the ceramic wiper plate of extrusion moulding adaptation continuous mass production, excellent property.Its technical scheme is:
Comprising ceramic material preparation, moulding, solidify, burn till, polish, is d with granularity
50＜0.5 μ m silicon carbide powder, granularity are d
50＜0.5 μ m Graphite Powder 99, granularity are d
50＜0.5 μ m carbon black, resol and whiteruss are 30～80: 2～20: 3～20: 10～20 by weight: 5～10 evenly are blended in and are made of mixing the silicon carbide ceramics plastic mud material in the vacuum deairing machine, with above-mentioned pug extrusion moulding, cut into the extrusion moulding base substrate, being 50～90 ℃ at curing cycle solidifies and to make the ceramic wiper plate base substrate in 8～10 hours, be room temperature～100 ℃ at calcining system, 4～6 hours, 100～300 ℃, 10～16 hours, more than 300 ℃, 8～12 hours, 1500～2000 ℃ of firing temperatures, nitrogen atmosphere was fired in 2～4 hours, and then ceramic wiper plate is made in polishing.
The present invention compared with prior art, its advantage is:
1, the present invention is plastic agent owing to having adopted resol, so that the blank strength after the curing of ceramic wiper plate base substrate obtains larger raising, can carry out biscuit processing, physical dimension is accurate, single-piece length can reach more than 2 meters, compare length with the alumina-ceramic Wiper blade and improved 20 times, the single-piece Wiper blade is complete without splicing seams, has avoided the irregular defective of conventional ceramic Wiper blade splicing seams;
2, since form behind the phenolic resin carbonized porous carbon high-activity carbon and with roasting material in pasc reaction Formed SiClx so that the uniform microstructure of ceramic wiper plate, intensity is high, global reliability is high.
3, because the microvoid structure of the porous high-activity carbon that phenolic resin carbonized forms has effectively stoped the immersion of silicon melt in the roasting material, the remaining silicon amount in the silicon carbide reaction-sintered goods is significantly reduced, improved silicon carbide reaction-sintered goods mechanical behavior under high temperature.
Description of drawings
Fig. 1 is the structural representation of ceramic wiper plate.
Embodiment
Embodiment 1
1, the moulding of extrusion moulding base substrate
Be that 0.3 μ m silicon carbide powder, granularity are that Graphite Powder 99, the granularity of 0.3 μ m is that 0.5 μ m carbon black, resol and whiteruss are 30: 20: 20 by weight with granularity: evenly be blended at 20: 10 and be made of mixing the silicon carbide ceramics plastic mud material in the vacuum deairing machine, with above-mentioned pug extrusion moulding, cut into the extrusion moulding base substrate.
2, solidify:
The extrusion moulding base substrate after solidifying in 8 hours, 90 ℃ of curing is made the ceramic wiper plate base substrate.
3, burn till:
Be room temperature～100 ℃ with the ceramic wiper plate base substrate after solidifying at calcining system, 4 hours, 100～300 ℃, 10 hours, more than 300 ℃, 8 hours, 1500 ℃ of firing temperatures, nitrogen atmosphere was fired in 4 hours, and then ceramic wiper plate is made in polishing.
The purity of testing used proportion material is technical pure.
The extrusion-formation of ceramic Wiper blade compressive strength that obtains is 260MPa..
Embodiment 2
1, the moulding of extrusion moulding base substrate
Be that 0.1 μ m silicon carbide powder, granularity are that Graphite Powder 99, the granularity of 0.5 μ m is that 0.3 μ m carbon black, resol and whiteruss are 55: 11: 11 by weight with granularity: evenly be blended at 15: 8 and be made of mixing the silicon carbide ceramics plastic mud material in the vacuum deairing machine, with above-mentioned pug extrusion moulding, cut into the extrusion moulding base substrate.
2, solidify:
The extrusion moulding base substrate after solidifying in 9 hours, 70 ℃ of curing is made the ceramic wiper plate base substrate.
3, burn till:
Be room temperature～100 ℃ with the ceramic wiper plate base substrate after solidifying at calcining system, 5 hours, 100～300 ℃, 13 hours, more than 300 ℃, 10 hours, 1800 ℃ of firing temperatures, nitrogen atmosphere was fired in 3 hours, and then ceramic wiper plate is made in polishing.
The purity of testing used proportion material is technical pure.
The extrusion-formation of ceramic Wiper blade compressive strength that obtains is 280MPa..
Embodiment 3
1, the moulding of extrusion moulding base substrate
Be that 0.5 μ m silicon carbide powder, granularity are that Graphite Powder 99, the granularity of 0.1 μ m is that 0.1 μ m carbon black, resol and whiteruss are 80: 2: 3 by weight with granularity: evenly be blended at 10: 5 and be made of mixing the silicon carbide ceramics plastic mud material in the vacuum deairing machine, with above-mentioned pug extrusion moulding, cut into the extrusion moulding base substrate.
2, solidify:
The extrusion moulding base substrate after solidifying in 10 hours, 50 ℃ of curing is made the ceramic wiper plate base substrate.
3, burn till:
Be room temperature～100 ℃ with the ceramic wiper plate base substrate after solidifying at calcining system, 6 hours, 100～300 ℃, 16 hours, more than 300 ℃, 12 hours, 2000 ℃ of firing temperatures, nitrogen atmosphere was fired in 2 hours, and then ceramic wiper plate is made in polishing.
The purity of testing used proportion material is technical pure.
The extrusion-formation of ceramic Wiper blade compressive strength that obtains is 240Mpa..
Claims (1)
1. the preparation method of a ceramic wiper plate comprises ceramic material preparation, moulding, solidifies, burns till, polishes, and it is characterized in that: be d with granularity
50＜0.5 μ m silicon carbide powder, granularity are d
50＜0.5 μ m Graphite Powder 99, granularity are d
50＜0.5 μ m carbon black, resol and whiteruss are 30～80: 2～20: 3～20: 10～20 by weight: 5～10 evenly are blended in and are made of mixing the silicon carbide ceramics plastic mud material in the vacuum deairing machine, with above-mentioned pug extrusion moulding, cut into the extrusion moulding base substrate, be 50～90 ℃ at curing cycle and admittedly made the ceramic wiper plate base substrate in dried 8～10 hours, be room temperature～100 ℃ at calcining system, 4～6 hours, 100～300 ℃, 10～16 hours, more than 300 ℃, 8～12 hours, 1500～2000 ℃ of firing temperatures, nitrogen atmosphere was fired in 2～4 hours, and then ceramic wiper plate is made in polishing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110168175 CN102358701B (en) | 2011-08-25 | 2011-08-25 | Preparation method of ceramic wiper plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110168175 CN102358701B (en) | 2011-08-25 | 2011-08-25 | Preparation method of ceramic wiper plate |
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| CN102358701A CN102358701A (en) | 2012-02-22 |
| CN102358701B true CN102358701B (en) | 2013-02-13 |
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| CN 201110168175 Expired - Fee Related CN102358701B (en) | 2011-08-25 | 2011-08-25 | Preparation method of ceramic wiper plate |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1569741A (en) * | 2004-04-29 | 2005-01-26 | 西安交通大学 | Method for extrusion molding of thyrite at normal temperature with phenol-formaldehyde resin as binding agent |
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2011
- 2011-08-25 CN CN 201110168175 patent/CN102358701B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1569741A (en) * | 2004-04-29 | 2005-01-26 | 西安交通大学 | Method for extrusion molding of thyrite at normal temperature with phenol-formaldehyde resin as binding agent |
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| CN102358701A (en) | 2012-02-22 |
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