WO1993025859A1 - Shelf plate having anti-spalling, anti-creep and oxidation resistant properties - Google Patents
Shelf plate having anti-spalling, anti-creep and oxidation resistant properties Download PDFInfo
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- WO1993025859A1 WO1993025859A1 PCT/JP1993/000759 JP9300759W WO9325859A1 WO 1993025859 A1 WO1993025859 A1 WO 1993025859A1 JP 9300759 W JP9300759 W JP 9300759W WO 9325859 A1 WO9325859 A1 WO 9325859A1
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- shelf
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
- C04B35/573—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide obtained by reaction sintering or recrystallisation
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D5/00—Supports, screens, or the like for the charge within the furnace
Definitions
- the present invention relates to a shelf board excellent in sponging resistance, creep resistance, and oxidation resistance, which can be preferably used for firing ceramics, tiles, and the like.
- Such refractory shelves can be thermally spoiled against the shelves even under severe operating conditions where the rate of temperature rise per hour exceeds 400. The excellent effect of preventing the occurrence of sporting has been recognized.
- the strength of the above-mentioned shelf board especially the bending strength
- the amount of the object to be fired such as ceramics which can be placed on the shelf board can be increased, and from the viewpoint of improving the firing efficiency and cost. I like it.
- sintering was actually performed using a shelf plate with a large bending strength, it was found that after a lapse of a predetermined time, the shelf plate shattered with intense noise and caused a bursting phenomenon.
- an object of the present invention is to provide a shelf plate having a large bending strength, which can increase the amount of a material to be fired, and which is excellent in sporting resistance and capable of preventing explosion. Things.
- a SiC sintered body is often used.
- a Si-SiC sintered body containing SiC and Si as constituent components is known;
- the firing temperature is 1200 to 135 ° C, so it can be used repeatedly for a long time.
- shelves warped and proved unusable In the case of 10,000 ill porcelain, tiles, bricks, etc., the firing temperature is relatively low at 110 ° C to 120 ° C, but it has been found that load deformation causes load deformation. .
- another object of the present invention is to provide a Si-SiC-based shelf plate which can increase the amount of the material to be fired and which has excellent creep resistance so that the shelf plate does not warp even after repeated use for a long time. It is to provide
- Still another object of the present invention is to have excellent oxidation resistance and endure long-term use.
- An object of the present invention is to provide a Si-SiC quality shelf board and a method of manufacturing the same. Disclosure of the invention
- a refractory shelf used in a heating furnace wherein the shelf is made of a material having a bending strength of a certain value or more, and
- a sporting-resistant shelf board characterized in that a slit having a predetermined length is formed from an edge to an edge facing the edge.
- S i -S i containing 2 to 25% by weight of 51 and 75 to 98% by weight of 0 S i C as a main phase.
- a creep-resistant shelf board provided with a C-made shelf board, wherein the A 1 impurity is controlled to 0.2 parts by weight or less with respect to 100 parts by weight of the main phase. Is done.
- a Si—SiC shelf containing 3 to 30% by weight of Si and 70 to 97% by weight iC as main phases.
- the porosity is controlled to 0.8% or less, and the amount of one or more impurities selected from the group consisting of Ca, A 1 and Fe is determined by the main phase 10.
- An oxidation-resistant shelf board characterized by being controlled to 0.8 parts by weight or less with respect to 0 parts by weight.
- the first shelf board used in the present invention has a flexural strength at a high temperature of 100 to 130 ° C. of 100 kgf / cm 2 or more, and The cut length is preferably in the range of 15 to 35% of the length of each side of the shelf.
- a first shelf board of the present invention is a shelf board having a predetermined slit length in a shelf made of a material having a bending strength of a certain value or more.
- Such shelves are particularly excellent in sponging resistance, do not cause explosion when firing ceramics or tiles, and may lead to accidents such as collapse in the furnace. It is preferably used as a shelf for a heating furnace.
- the bending strength is preferably a certain value or more, preferably ⁇ 10.
- a material made of a material having a flexural strength of 1000 kgf / cm 2 or more at a high temperature of 000 to 130 ° C is used.
- S i includes as a constituent S i C and S i - S i C sintered or recrystallized S i C sintered, S i 3 N 4 sintered It can be used favorably because of its high strength.
- a slit having a predetermined length is formed on the high-strength shelf board as described above.
- the slit is formed from the edge of the shelf to the opposite edge, and the slit length is equal to the length of the side of the shelf parallel to the slit. It is preferably in the range of ⁇ 35%, especially in the range of 20-30%.
- the slit length is within the above range, the sliver crack does not occur, and the breakage of the shelf is suppressed as much as possible.
- the slit length exceeds 35% of the side length of the shelf, the strength of the shelf decreases, making it difficult to handle when used.
- S i is a high-strength material for use in the present invention - illustrating an example of S i C sintered body manufacturing method of recrystallization S i C sintered body, and S i 3 N 4 sintered body I do.
- the Si-SiC sintered body is obtained by adding fine carbon powder and an organic binder to the SiC particles, forming the mixture by press molding, casting or extrusion molding, and then reducing the pressure. It can be manufactured by placing in an inert gas atmosphere or vacuum and impregnating with metal Si. Further, the recrystallized SiC sintered body can be manufactured by adding an organic binder to the SiC particles, firing the molded body in an inert atmosphere after molding. In addition, for the Si 3 N 4 sintered body, the sintering aid is mixed with the Si 3 N 4 powder It can be manufactured by molding and firing this molded body in a nitrogen atmosphere.
- press molding is preferred as a method for molding a molded body, since slit formation can be performed simultaneously and mass productivity is excellent.
- a hydraulic press is preferred as the press forming.
- the hydraulic press pressure usually 50 to 200 kgf / cm 2 is preferably used.
- the second shelf is composed of the SiC raw material, the C raw material, and the A1 and other materials mixed in the S raw material used for producing the Si_SiC sintered body composing the shelf. It is based on the finding that impurities reduce the body creep of the shelf, and is configured by appropriately controlling the amount of A 1 impurities contained in the shelf.
- the amount of A 1 impurities is based on 100 parts by weight of a main phase consisting of 2 to 25% by weight of S i and 75 to 98% by weight of S i C. It is controlled to 0.2 parts by weight or less, preferably 0.1 part by weight or less. Exceeding 0.2 parts by weight is not preferred because the creep resistance of the shelf is reduced.
- examples of other impurities to be controlled in this shelf board include Fe, Ti, Ca, Mg, Cr, and Ni.
- the amount of these impurities is controlled to 0.05 to 1 part by weight, preferably 0.05 to 0.5 part by weight, based on the main phase. If the content is less than 0.05 part by weight, the oxidation resistance is reduced. If the content exceeds 1 part by weight, the cleaving resistance starts to decrease and the shelf board components may move to the object to be fired. Is not preferred.
- Si02 can be mentioned; the amount of these impurities is preferably controlled to 3.0 parts by weight or less as described above. If it exceeds 3.0 parts by weight, the resulting shelf board will have poor creep resistance, which is not preferable.
- the method for producing the S i — S i C sintered body constituting the second shelf plate is the same as that for the first shelf plate described above, but the amount of impurities such as A 1, Fe, and T It can be controlled by selecting i C raw material, metal Si raw material and the like. That is, by selecting and using a raw material containing a predetermined amount of the above-described impurities, the amount of impurities contained in the obtained Si-SiC sintered body can be controlled. It is also possible to add and remove these impurities as needed to make fine adjustments.
- the second shelf does not require a slit as an essential component, and has sufficient slip resistance even without a slit. It is also possible to provide a specified slit on the shelf plate of this, and thereby, it is possible to improve the spoiling resistance.
- the third shelf is a shelf obtained by controlling the porosity of the Si—SiC sintered body and the amounts of impurities such as Ca, A 1, and Fe. is there.
- the amount of one or more impurities selected from the group consisting of A1, and Fe is determined by combining 3 to 30% by weight of 51 and 70 to 97% by weight of 51 (:
- the oxidation resistance of the shelf is improved by controlling the amount of these elements that promote oxidation such as Ca to 0.8 parts by weight or less with respect to 100 parts by weight. is there.
- a raw material for molding 1 to 12% by weight of (: powder, 88 to 99% by weight of 5 iC powder, 100 parts by weight of a mixture of C powder and S i C powder is 0% by weight.
- a raw material containing 1 to 15 parts by weight of an organic binder and an appropriate amount of water or an organic solvent knead the forming raw material, and form a molded body.
- the first and second shelves under a metal Si atmosphere, place in a reduced pressure inert gas or vacuum, and impregnate the metal body with the metal Si in the Si-SiC sintering.
- the C, A 1 and Fe impurities contained in the C powder, S i C powder and the metal S i used for impregnation are obtained, and the sintered body 100 is obtained.
- the amount is controlled to 0.8 parts by weight or less with respect to parts by weight, and if the amount exceeds 0.8 parts by weight, the oxidation resistance tends to decrease, which is not preferable.
- C a raw material, S i or used to select the C raw materials, Ru can and this performing Ri by the and this finely adjusted by the this appropriately adding and removing these impurities.
- impregnation is performed so that the porosity of the obtained Si—SiC sintered body becomes 0.8% or less.
- the addition amount of the metal Si is In view of the impregnation efficiency, etc., it is necessary to make the porosity excessively higher than the required M weight to achieve 0.8% porosity. That is, in order to achieve a porosity of 0.8%, it is necessary to add the metal Si in excess of 1.05 times the theoretical amount.
- the added metal S i is consumed in three modes: one that contributes to the reaction of S i + C ⁇ S i C, one that fills the pores, and one that is surplus S i. If the ratio is less than 1.05 times, impregnation of Si is insufficient, and the porosity of the obtained sintered body is increased, and the oxidation resistance is decreased, which is not preferable.
- the main phase is composed of 3 to 20% by weight of Si and 1 (: 70%). 997% by weight.
- the method of forming the molded body is the same as that of the first shelf board.
- the third shelf plate does not require a slit as an essential component and has sufficient oxidation resistance even without a slit. It is also possible to provide a specified slit on the board, which can also improve the resistance to spalling.
- FIG. 1 is an explanatory diagram showing an example of a shelf containing slits.
- FIG. 2 is an explanatory view showing another example of a shelf containing slits.
- FIG. 3 is an explanatory view showing another example of a shelf containing slits.
- FIG. 4 is an explanatory view showing another example of a shelf containing slits.
- FIG. 5 is an explanatory side view showing an example of a creep resistance evaluation test. BEST MODE FOR CARRYING OUT THE INVENTION
- the sintered body was placed in H 2 0 + 0 2 gas at 1000 for 100 hr, and the increase ( ⁇ W) was measured.
- the average particle size of the SiC powder obtained by mixing the SiC fine powder with an average particle size of 5.0 m and the SiC coarse powder with an average particle size of 100; / m in a weight ratio of 35:65 is 1.5% by weight of graphite powder with a diameter of 1.5Zm, 5.0% by weight of organic binder (methyl cellulose), and 5.0% by weight of water or organic solvent are blended with external additives for molding.
- Raw material was obtained. Next, after these forming raw materials are crushed using a ball mill, the crushed forming raw materials are introduced into a mold, and formed at 400 kg / cm 2 using a hydraulic press. As shown in FIG.
- the plate-shaped compact and 50% by weight of the metal Si of the compact were placed in a carbon crucible provided with a reaction preventing layer of BN (boron nitride) coating.
- BN boron nitride
- a Si—SiC sintered body was manufactured.
- the holding time at the maximum temperature (1800 ° C) was set to 2 hours.
- the temperature was raised at 10 ° C./hr between 140 ° C. and 150 ° C.
- Example 1 The same operation as in Example 1 was repeated, except that no slit was provided in the plate-like molded body. Table 1 shows the obtained results.
- the Sic powder obtained by mixing the SiC fine powder having an average particle diameter of 5.0 m and the SiC coarse powder having an average particle diameter of 100 m in a weight ratio of 35:65 is added to an organic binder ( (Methyl cell mouth) 1.0% by weight and 5.0% by weight of water or organic solvent were externally blended to obtain a raw material for molding.
- organic binder (Methyl cell mouth) 1.0% by weight and 5.0% by weight of water or organic solvent were externally blended to obtain a raw material for molding.
- these molding materials were molded in the same manner as in Example 1 to obtain various plate-like molded bodies having the same four slits as in Example 1.
- this plate-shaped compact was fired at 230 ° C. for 3 hours in an argon gas atmosphere to obtain a recrystallized SiC sintered body.
- Example 2 The same operation as in Example 2 was repeated, except that no slit was provided in the plate-like molded body. Table 1 shows the obtained results.
- Si 3 N 4 powder with an average particle size of 0, 8% by weight, 7% by weight of titanium oxide, 2% by weight of zirconium oxide, and 3% by weight of magnesium oxide 65 parts by weight of water was added to 100 parts by weight of the resulting raw material powder, mixed and pulverized for 5 hours, and then molded into the same shape as in Example 1.
- the obtained molded body was fired in a nitrogen atmosphere at a gauge pressure of 0.5 kg / cm 2 at 170 ° C. for 1 hour to obtain a Si 3 N 4 sintered body.
- 1 atm of gas such as N 2 or Ar.
- the pressure can be as high as about 0.2 to 0.05 Torr.
- Example 1 ⁇ ⁇ (v ⁇
- Example 2 Using the same method as in Example 1, a molded body having a thickness of 5 mm with a different slit length as shown in Table 2 was obtained, and was fired under the same conditions as in Example 1.
- the resulting S i — S i C sintered body was measured for its sporting resistance ( ⁇ T) and crack length. Table 2 shows the results.
- the shelf plate explodes due to the temperature difference ( ⁇ ⁇ ) from the atmosphere at the moment when the shelf is taken out of the furnace, the shelf assembly collapses when the shelf is taken out of the furnace in the actual firing process. This is because it is extremely dangerous to injure the workers and, in addition, if the shelves scatter due to explosion, the workers may be injured by the scattered debris.
- the average particle size of the SiC powder obtained by mixing the SiC fine powder having an average particle size of 5.0 / m and the SiC coarse powder having an average particle size of 100 m in a weight ratio of 35:65 is used.
- 1.5 wt% of graphite powder 5.0 wt%, organic binder (methylcellulose) 1.0 wt%, and 5.0 wt% of water or organic solvent are compounded by external distribution, and the molding raw material is mixed. Obtained.
- mixing was performed using a SiC raw material containing predetermined amounts of impurities such as A 1, Fe, and Ti, and the amounts of these impurities were controlled to the values shown in Table 1.
- the amount of Si02 was controlled by adjusting the amount of Si02 contained in the Si raw material and the SiC raw material.
- the plate-shaped compact and the metal Si were added to the SiC powder in a bon crucible provided with a reaction preventing layer of BN (boron nitride) coating.
- the plate-shaped molded body and the metal Si were placed at 0.1 Torr between room temperature and 600 ° C. by appropriately changing the amount so that the ratio (inner distribution) shown in FIG. Under a vacuum, between 600 and 100 000 in a 1 Torr argon gas atmosphere, and between 100 and 180 ° C in an argon gas atmosphere.
- a Si—SiC sintered body impregnated with metal Si and controlling the amount of impurities such as A 1 was manufactured.
- the holding time at the maximum temperature (1800 ° C) was set to 2 hours.
- the temperature was raised at 10 ° C./hr between 140 ° C. and 150 ° C.
- the creep resistance of the obtained Si—SiC sintered body was measured by the following method. Table 3 shows the obtained measurement results, formulations, and the like. (Evaluation method for creep resistance)
- the Si—SiC sintered body of the present invention has excellent creep resistance.
- An S1C fine powder having an average particle size of 3 Zm and a SiC coarse powder having an average particle size of 100 mixed at a weight ratio of 30:70 (weight ratio) are mixed with an S1C powder having an average particle size of 1 m.
- the graphite powder was mixed at a predetermined ratio. 100 parts by weight of this mixture were mixed with 2 parts by weight of an organic binder (methylcellulose) and 3 parts by weight of water or an organic solvent to obtain a molding raw material.
- an Si C raw material and a C raw material containing predetermined amounts of the impurities Ca, A 1 and Fe are mixed using a metal Si raw material to be impregnated later. The values were controlled as shown in Table 4.
- these forming raw materials are crushed using a ball mill, the crushed forming raw materials are introduced into a mold, and are formed at 500 kg / era 2 using a hydraulic press.
- a plate-shaped molded body (400 mm x 400 mm) having a thickness of 5 mm was obtained.
- the plate-shaped formed body and the metal Si were placed in a carbon crucible provided with a reaction prevention layer of BN (boron nitride) coating. At this time, the amount was appropriately changed so that the amount of metal Si exceeded the theoretical amount of metal Si required to achieve a porosity of 0.8% by the magnification shown in Table 4. Was installed.
- BN boron nitride
- the plate-shaped compact and the metal S i were placed in a 0.1 Torr vacuum between room temperature and 600 ° C., and in a 2 Torr argon gas atmosphere between 600 and 100 ° C.
- Si-SiC sintering in which the metal Si is impregnated and the amount of impurities such as Ca is controlled by firing at a reduced pressure of 5 Torr in an argon gas atmosphere up to 000 to 180 ° C Body manufactured.
- the holding time at the maximum temperature (1800 ° C) was set to 3 hours.
- the temperature was raised at 10 ° C.Zr between 140 ° C. and 150 ° C.
- the oxidation resistance of the obtained Si—SiC sintered body was measured by the following method. Table 4 shows the obtained measurement results, porosity, composition, and the like.
- a 60 mm ⁇ 60 mm ⁇ 5 mm (thickness) test piece was cut out and oxidized in a mixed gas of H 20 and 02 at 115 ° C.
- the oxidation rate of each test piece was measured as described below. (Oxidation rate)
- the Si—SiC sintered body (shelf plate) of the present invention has an oxidation rate of 50 ppm / hr or less and has excellent oxidation resistance.
- a Si-SiC sintered body (shelf) can be manufactured with extremely high reproducibility.
- a slit was provided to the S i —S i C sintered body obtained in Examples 8 to 12 in the same manner as in Example 1.
- the resulting Si-SiC sintered body was measured for its spalling resistance, creep resistance, etc., and the results are shown in Table 5. However, in the sporting resistance test, the thickness of the sintered body was 5 mm.
- Example 2 In the same manner as in Example 1, slits were provided on the Si—SiC sintered bodies obtained in Examples 14 to 19. The resulting Si—SiC sintered body was measured for its resistance to sporting and oxidation, and the results are shown in Table 5.
- the shelf board of the present invention in which a specific Si—SiC sintered body and a specific slit are combined has not only the resistance to spalling but also the resistance to spoiling. It can be seen that creep properties and oxidation resistance are also good. Industrial applicability
- the first shelf plate of the present invention described above is made of a material having a bending strength of not less than a predetermined value and a slit length of not less than a predetermined value.
- the firing efficiency can be improved and the spoiling resistance is excellent.
- the second and third shelves are provided with controlled properties of S i —S i C to predetermined properties, and are therefore excellent in creep resistance and oxidation resistance.
- any of the shelves of the present invention can be used for kiln tools such as shelves for rapid firing furnaces, saggers, sashes and the like, especially roller sheer skills, which emphasize resistance to sparkling, creep and oxidation. It can be used favorably for shelf boards for tile firing using tiles.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
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Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4392693T DE4392693T1 (de) | 1992-06-08 | 1993-06-07 | Temperaturwechselbeständige, kriechfeste und oxydationsfeste Einsätze |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4/147435 | 1992-06-08 | ||
JP4147435A JP2758313B2 (ja) | 1992-06-08 | 1992-06-08 | 耐スポーリング性棚板 |
JP4/167526 | 1992-06-25 | ||
JP4167526A JP2535480B2 (ja) | 1992-06-25 | 1992-06-25 | 耐クリ―プ性Si−SiC質焼結体 |
JP4/238457 | 1992-09-07 | ||
JP23845792A JP3437194B2 (ja) | 1992-09-07 | 1992-09-07 | 耐酸化性Si−SiC質焼結体 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993025859A1 true WO1993025859A1 (en) | 1993-12-23 |
Family
ID=27319351
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1993/000759 WO1993025859A1 (en) | 1992-06-08 | 1993-06-07 | Shelf plate having anti-spalling, anti-creep and oxidation resistant properties |
Country Status (3)
Country | Link |
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CN (1) | CN1076468C (ja) |
DE (1) | DE4392693T1 (ja) |
WO (1) | WO1993025859A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2012014835A1 (ja) * | 2010-07-26 | 2012-02-02 | 日本碍子株式会社 | 焼成用ラック |
JP5465216B2 (ja) * | 2010-08-11 | 2014-04-09 | 日本碍子株式会社 | 焼成用セッター |
JP5779794B2 (ja) * | 2013-03-19 | 2015-09-16 | 日本碍子株式会社 | ベースセッター |
JP6678991B2 (ja) * | 2016-03-31 | 2020-04-15 | 日本碍子株式会社 | 蓄熱部材 |
JP7167367B2 (ja) * | 2020-09-07 | 2022-11-08 | 日本碍子株式会社 | 耐火材 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5035094Y2 (ja) * | 1972-08-02 | 1975-10-13 | ||
JPS61143686A (ja) * | 1984-12-18 | 1986-07-01 | イビデン株式会社 | 寸法精度の優れた耐熱性治具用炭化珪素質焼結体 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1419676A (fr) * | 1964-08-26 | 1965-12-03 | Cie Des Meules Norton | Support réfractaire pour la cuisson de produits |
NO117628B (ja) * | 1964-09-11 | 1969-09-01 | Corning Glass Works | |
DE2239971C3 (de) * | 1972-08-14 | 1980-07-24 | Aleksandr Stepanovitsch Widnoe Moskovskoj Oblasti Tarabanov | Verfahren zur Herstellung eines Antifriktionsstoffs |
US3998646A (en) * | 1974-11-11 | 1976-12-21 | Norton Company | Process for forming high density silicon carbide |
US4174950A (en) * | 1977-12-19 | 1979-11-20 | United Technologies Corporation | Ceramic base and cap useful in firing ceramic shell molds |
GB2082165B (en) * | 1980-07-17 | 1984-03-28 | Asahi Glass Co Ltd | Silicon carbide ceramic |
DD234573A3 (de) * | 1982-04-26 | 1986-04-09 | Elektrokohle Lichtenberg Veb | Sic-formkoerper mit gleichbleibendem elektrischm widerstand |
DE8321679U1 (de) * | 1983-07-27 | 1983-12-01 | Norton Co., 01606 Worcester, Mass. | Platte aus feuerfestem material |
-
1993
- 1993-06-07 DE DE4392693T patent/DE4392693T1/de not_active Ceased
- 1993-06-07 WO PCT/JP1993/000759 patent/WO1993025859A1/ja active Application Filing
- 1993-06-08 CN CN 93108410 patent/CN1076468C/zh not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5035094Y2 (ja) * | 1972-08-02 | 1975-10-13 | ||
JPS61143686A (ja) * | 1984-12-18 | 1986-07-01 | イビデン株式会社 | 寸法精度の優れた耐熱性治具用炭化珪素質焼結体 |
Also Published As
Publication number | Publication date |
---|---|
CN1076468C (zh) | 2001-12-19 |
DE4392693T1 (de) | 1994-09-08 |
CN1081760A (zh) | 1994-02-09 |
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