CN1445194A - Improved carborundum lamella - Google Patents
Improved carborundum lamella Download PDFInfo
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- CN1445194A CN1445194A CN 03113304 CN03113304A CN1445194A CN 1445194 A CN1445194 A CN 1445194A CN 03113304 CN03113304 CN 03113304 CN 03113304 A CN03113304 A CN 03113304A CN 1445194 A CN1445194 A CN 1445194A
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- thin plate
- silicon carbide
- described silicon
- sic
- carbide thin
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Abstract
An improved thin SiC plate as refractory in kiln contains SiC particles (less than 3 mm) (90-99 wt.%), SiC powder (less than 2 microns) (1-10), and V2O5 (0.03-0.7). Its advantages are high density, bending strength, and resistance to oxidizing, cracking, creeping, and high temp. and long service life (400 times at 1380-1390 deg.C).
Description
Technical field
Invention is the improvement of pottery, the calcining of fire-resistant industry being used the siliceous kiln furnitures of carbonization, relates in particular to a kind of silicon carbide thin plate that burns product of putting.
Background technology
The siliceous kiln furnitures of carbonization are much accounted of because of its good performance, are widely used as make shelf, backing plate, sheath etc. in pottery, the calcining of fire-resistant industry.Be the further improvement to the cracking that brought by SiC particle and trace metal oxide-bonded, oxidation, creep resistant, Chinese patent 95103594 discloses a kind of V that adds 0.01-0.7% in the following SiC particle of 4mm
2O
5, the CaO of 0.01-0.7% and 0.01-5% the siliceous kiln furnitures of carbonization formed of clay.This invention is for reaching the balanced above-mentioned characteristic of improving, removing needs the strict above-mentioned prescription that adopts, also need to burn till the product special parameter and could effectively guarantee the balanced above-mentioned characteristic of improving by control, as cristobalite and the SiC difference measured respectively by powder method with X-ray diffraction and control table layer segment and centre portions generate, make it to satisfy ratio greater than 20% above condition, and the bending strength when making the normal temperature bending strength of burning till product be 1400 ℃ ± 20% scope in.Yet control is burnt till product and is formed specified property, is again slowly to heat up through crossing calcining and 1300-1500 ℃ more than 10 hours through continuous calcining realization in 2-10 hour by 700-1100 ℃.Yet this method in actual manufacturing is burnt till, complex process not only, and will reach These parameters and require difficulty bigger, and higher to burning kiln and respective detection Equipment Requirement.In addition, owing to use CaO, make that having eutectic when burning till produces in this invention, cause in use easily producing cracking and high-temperature bending strength and descend; Should invention promote moulding in addition by adding the clay softening agent, but its introducing not only can import impurity, make the high-temperature behavior variation, cause goods high temperature bending resistance (high temperature load) to descend, for example use easy deformation more than 1500 ℃ at high temperature, but also can cause heat transfer property to descend, increase and put the burning energy consumption.Besides, use CaO and clay all can cause the anti-shock property of goods to descend.Therefore still having is worth improved place.
Existing besides silicon carbide refractory slab, the anti-expansion joint (E.J.) of its radial and axial setting, for avoiding swelling cracking to extend, usually the end at seam offers the many circular port big than the slit, yet can make the upper strata fall slag than the existence of big hole and drop on lower floor's product, cause the infringement of burning quality product putting by circular hole.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned prior art, it is good a kind of anti-cracking, oxidation, creep properties to be provided and to bear high-temperature behavior, long service life, and fire simple silicon carbide thin plate.
Another object of the present invention is to provide a kind of upper strata that can effectively prevent to fall slag and fall into lower floor, influence lower floor and put the silicon carbide thin plate that burns product.
The present invention's first purpose realizes, the main improvement is to adopt a certain amount of SiC micro mist to replace easily causing generating eutectic and the CaO and the clay that cause high temperature fracture resistance and anti-acute degeneration to descend, not only make thin plate of the present invention can obtain anti-oxidant preferably, high anti-folding, reach good acute degeneration (anti-cracking), and burn till simple, do not need the specific component content of special control burned material, and respective detection equipment.Specifically, silicon carbide thin plate of the present invention is characterized in that consisting of the following SiC particle of 90-99% (weight) 3mm, 2 μ of 1-10%-0SiC micro mist, the V of 0.03-0.7%
2O
5
The present invention is owing to adopt the SiC micro mist, the specific surface area that micro mist is big, and the plastic forming combination when not only having improved moulding helps the moulding of SiC particle product; And in oxydizing flame burns till than easier oxidation of SiC particle and V
2O
5Agent reaction takes place, form firm homogeneity in conjunction with phase, high temperature bond is good, has CaO and clay effect simultaneously, thereby alternative CaO and clay, has avoided the defective of using CaO and clay to bring.
The present invention's second purpose realizes that main the improvement is by the lengthening dilatation joint, improves anti-shock property, economizes slightly to prevent swelling cracking and do not hold at dilatation joint big hole is set, and falls into lower floor and puts and burn product and influence quality thereby effectively avoided the upper strata to fall slag.Silicon carbide thin plate dilatation joint of the present invention can be than the long 13-25% of same specification thin plate.
The present invention effectively stops thin plate surface oxidation in hot environment to generate glassy phase, and bonding is by the Beijing enamel part, shelves at thin plate and waits to burn product table (just) face and be coated with and be brushed with anti-oxidation aluminum oxide coating layer.
The present invention is owing to adopt the silicon carbide super-fine powder, substitute the clay that easily produces the CaO of glassy phase and influence high-temperature behavior, not only make extrudate density improve, overcome and used the deficiency that CaO and clay brought, anti-oxidant, anti-cracking, high temperature break resistant intensity, anti-acute degeneration, the creep resistant of goods and bear high-temperature behavior and all obtain significantly balanced the raising, and burn till simple, need not special control burned material Chemical Composition, easy-sintering, the time is short, and energy consumption is few.Goods SiC content height of the present invention reaches 94-98%, and volume density is big, reaches 2.68-2.75g/cm
3, the high temperature break resistant intensity height, the anti-folding of high temperature reaches 34-45MPa in the time of 1400 ℃, the use temperature height, maximum operation (service) temperature can reach 1500 ℃, long service life, reach more than 400 times work-ing life in 1380-1390 ℃ of environment.The raising of high temperature fracture resistance simultaneously, the anti-rimose dilatation joint of thin plate is extended, and the lengthening of dilatation joint makes thin plate obtain better anti-acute degeneration and resistance to cracking again, effectively eliminate thermal expansion, thereby can omit the big hole that the terminal anti-cracking of dilatation joint extends.The aluminum oxide white coating that thin sheet surface is anti-oxidation provides effective assurance for high temperature uses anti-oxidation bonding to put the burning product again.The present invention is because of using the SiC super-fine powder, and molding blank is talks yellow, and burnt product transfers black to, brushing inoxidzable coating top layer white.
Below in conjunction with several specific embodiments, further specify the present invention.
Embodiment
Embodiment: by Example formulations (subordinate list), each raw material is fully evenly mixed, add the water of 5-7% and 0.1% methylcellulose gum (increasing moulding plasticity), make the thin plate of 500 * 370 * 12mm through vibratory compaction, radial and axially have 85 and the dilatation joint of 110mm (same specification thin plate dilatation joint respectively long 75 and 90mm), naturally cooling was burnt till through 6 hours in dry back in 1500 ℃ of oxydizing flame.The last anti-oxidation mud of external coating 98% aluminum oxide of shelving product.
Embodiment proportioning table
| Component | Example 1 | Example 2 | Example 3 |
| The SiC particle | ???????95％ | ?????????90％ | ????????98％ |
| Wherein (mm) | 3-1??????????30％ | 3-1???????????????30％ | 3-1????????????30％ |
| 1-0.42???????30％ | 1-0.42????????????32％ | 1-0.42?????????30％ | |
| 0.25-0.105???10％ | 0.25-0.105????????18％ | 0.25-0.105?????10％ | |
| 0.105-0??????30％ | 0.105-0???????????20％ | 0.105-0????????30％ | |
| 2 μ-0SiC super-fine powder | ??????4.8％ | ?????????9.95％ | ???????1.35％ |
| ????V 2O 5 | ??????0.2％ | ?????????0.05％ | ???????0.65％ |
| Methylcellulose gum | ??????0.1％ | ?????????0.1％???????? | ???????0.1％ |
| SiC content % | ??????97.5 | ?????????94 | ???????99 |
| Density g/cm 3????? | ??????2.73 | ?????????2.68 | ???????2.7 |
| 1400 ℃ of the anti-foldings of high temperature | ??????41.2MPa | ?????????34.3MPa | ??????31.7MPa |
Claims (6)
1, a kind of silicon carbide thin plate is characterized in that consisting of the following SiC particle of 90-99% (weight) 3mm, 2 μ of 1-10%-0SiC micro mist, the V of 0.03-0.7%
2O
5
2,, it is characterized in that said thin plate SiC content 94-98% according to the described silicon carbide thin plate of claim 1.
3,, it is characterized in that said thin plate volume density 2.68-2.75g/cm according to the described silicon carbide thin plate of claim 1
3
4,, it is characterized in that 1400 ℃ of high temperature break resistant intensities of said thin plate are 34-45MPa according to the described silicon carbide thin plate of claim 1.
5,, it is characterized in that the radial and axial dilatation joint of said thin plate is than the long 13-25% of same specification thin plate according to claim 1,2,3 or 4 described silicon carbide thin plates.
6,, it is characterized in that said thin plate shelves product surface to be burnt anti-oxidation aluminum oxide coating layer is arranged according to the described silicon carbide thin plate of claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03113304 CN1445194A (en) | 2003-04-24 | 2003-04-24 | Improved carborundum lamella |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03113304 CN1445194A (en) | 2003-04-24 | 2003-04-24 | Improved carborundum lamella |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1445194A true CN1445194A (en) | 2003-10-01 |
Family
ID=27814698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03113304 Pending CN1445194A (en) | 2003-04-24 | 2003-04-24 | Improved carborundum lamella |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1445194A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383085C (en) * | 2006-03-10 | 2008-04-23 | 宁夏协成冶金制品有限公司 | Silicon carbide kiln furniture and its preparing process |
| CN102775163A (en) * | 2012-07-25 | 2012-11-14 | 江苏省陶瓷研究所有限公司 | Silicon carbide-cordierite composite ceramic kiln furniture and preparation method thereof |
| CN103224410A (en) * | 2013-04-27 | 2013-07-31 | 福建省佳圣轩工艺品有限公司 | Silicon carbide plate reparation method |
-
2003
- 2003-04-24 CN CN 03113304 patent/CN1445194A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383085C (en) * | 2006-03-10 | 2008-04-23 | 宁夏协成冶金制品有限公司 | Silicon carbide kiln furniture and its preparing process |
| CN102775163A (en) * | 2012-07-25 | 2012-11-14 | 江苏省陶瓷研究所有限公司 | Silicon carbide-cordierite composite ceramic kiln furniture and preparation method thereof |
| CN102775163B (en) * | 2012-07-25 | 2013-12-18 | 江苏省陶瓷研究所有限公司 | Silicon carbide-cordierite composite ceramic kiln furniture and preparation method thereof |
| CN103224410A (en) * | 2013-04-27 | 2013-07-31 | 福建省佳圣轩工艺品有限公司 | Silicon carbide plate reparation method |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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