JPH01215770A - Production of gas blowout form made of ceramic - Google Patents
Production of gas blowout form made of ceramicInfo
- Publication number
- JPH01215770A JPH01215770A JP3887288A JP3887288A JPH01215770A JP H01215770 A JPH01215770 A JP H01215770A JP 3887288 A JP3887288 A JP 3887288A JP 3887288 A JP3887288 A JP 3887288A JP H01215770 A JPH01215770 A JP H01215770A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- mold
- slurry
- ceramic
- ceramic slurry
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000002002 slurry Substances 0.000 claims abstract description 33
- 239000011347 resin Substances 0.000 claims abstract description 30
- 229920005989 resin Polymers 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims description 10
- 238000010306 acid treatment Methods 0.000 claims description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000006260 foam Substances 0.000 abstract description 2
- 230000009974 thixotropic effect Effects 0.000 abstract description 2
- 238000001354 calcination Methods 0.000 abstract 3
- 229910052581 Si3N4 Inorganic materials 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 229910052602 gypsum Inorganic materials 0.000 abstract 1
- 239000010440 gypsum Substances 0.000 abstract 1
- 229910003465 moissanite Inorganic materials 0.000 abstract 1
- 229910010271 silicon carbide Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 31
- 239000002184 metal Substances 0.000 description 18
- 210000003491 skin Anatomy 0.000 description 18
- 239000011148 porous material Substances 0.000 description 10
- 230000002093 peripheral effect Effects 0.000 description 8
- 238000003756 stirring Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000013256 coordination polymer Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 235000010407 ammonium alginate Nutrition 0.000 description 1
- KPGABFJTMYCRHJ-YZOKENDUSA-N ammonium alginate Chemical compound [NH4+].[NH4+].O1[C@@H](C([O-])=O)[C@@H](OC)[C@H](O)[C@H](O)[C@@H]1O[C@@H]1[C@@H](C([O-])=O)O[C@@H](O)[C@@H](O)[C@H]1O KPGABFJTMYCRHJ-YZOKENDUSA-N 0.000 description 1
- 239000000728 ammonium alginate Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Nozzles (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は金属溶湯を攪拌する場合などに使用するセラミ
ック製ガス噴出体の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a ceramic gas ejector used for stirring molten metal.
（従来の技術）
金属溶湯中ヘガスを噴出して溶湯の攪拌を行う方法が従
来から実施されており、この場合のガス噴出体としては
、溶湯に侵食されない耐熱金属にガス噴出用の細孔を形
成したり、耐熱金属を焼結させたものを用いている。し
かしながら、金属によってガス噴出体を構成すると、長
時間の使用によって徐々に溶湯によって侵食され、また
形成する細孔の径にも限度がある。(Prior art) A method of stirring the molten metal by ejecting gas into the molten metal has been practiced in the past, and the gas ejector in this case is a heat-resistant metal that is not corroded by the molten metal and has pores for ejecting gas. It is made of molded or sintered heat-resistant metal. However, if the gas ejector is made of metal, it will be gradually eroded by the molten metal over a long period of time, and there is also a limit to the diameter of the pores that can be formed.
そこでセラミックによってガス噴出体を構成することが
考えられる。斯かるセラミック製ガス噴出体の製造方法
としては特開昭６１−４４７７８号に開示されるものが
知られている。この方法は発泡樹脂の骨格表面にセラミ
ックスラリ−を付着せしめた後、発泡樹脂を回転せしめ
、遠心力によってセラミックスラリ−を外周部に集め、
発泡樹脂を燃焼飛散せしめるとともにセラミックを焼結
することで、外周部に緻密な層を形成するようにしたも
のである。Therefore, it is conceivable to construct the gas ejecting body using ceramic. As a method for manufacturing such a ceramic gas ejecting body, the method disclosed in Japanese Patent Application Laid-open No. 44778/1986 is known. In this method, after attaching ceramic slurry to the skeletal surface of foamed resin, the foamed resin is rotated and the ceramic slurry is collected around the outer periphery by centrifugal force.
By burning and scattering the foamed resin and sintering the ceramic, a dense layer is formed on the outer periphery.
（発明が解決しようとする課題）
上述したように外周部に緻密な層を有する多孔セラミッ
ク体であれば、ガスの流れに方向性を持たせることがで
きるのであるが、微細な孔を形成することが困難で且つ
緻密な層は外周部にしか形成できないため用途が限定さ
れてしまう。(Problems to be Solved by the Invention) As mentioned above, if a porous ceramic body has a dense layer on the outer periphery, it is possible to give directionality to the flow of gas, but it is possible to provide directionality to the gas flow. Since it is difficult to form a dense layer only on the outer periphery, its uses are limited.
（課題を解決するための手段）
上記課題を解決すべく本発明は、発泡樹脂の骨格表面に
セラミックスラリ−を付着せしめ、これを型内にセット
し、更に型と発泡樹脂との隙間に別途用意したセラミッ
クスラリ−を充填し、このセラミックスラリ−の部分を
後の焼結によって緻密な表皮層とするようにした。(Means for Solving the Problems) In order to solve the above problems, the present invention adheres a ceramic slurry to the skeletal surface of a foamed resin, sets it in a mold, and further adds a ceramic slurry to the gap between the mold and the foamed resin. The prepared ceramic slurry was filled, and the ceramic slurry was later sintered to form a dense skin layer.
（作用）
骨格表面にセラミックスラリ−が付着した発泡樹脂との
隙間に、所定粘度の他のセラミックスラリ−を充填する
と、このセラミックスラリ−は発泡樹脂内部にあまり浸
入せず、焼結後に当該セラミックが緻密な表皮層となる
。そして、この表皮層の厚みを適切なものとするか、酸
処理を施すことで、ガスの導入又は噴出に適した細孔を
形成することができる。(Function) If another ceramic slurry of a predetermined viscosity is filled into the gap between the foamed resin and the ceramic slurry adhered to the skeleton surface, this ceramic slurry will not penetrate into the foamed resin much, and the ceramic will be removed after sintering. becomes a dense epidermal layer. Then, by adjusting the thickness of this skin layer to an appropriate value or by subjecting it to acid treatment, pores suitable for introducing or ejecting gas can be formed.
（実施例） 以下に本発明の実施例を添付図面に基づいて説明する。(Example) Embodiments of the present invention will be described below based on the accompanying drawings.
第１図乃至第３図は本発明によって作製したガス噴出体
の使用例を示す図である。FIGS. 1 to 3 are diagrams showing examples of use of the gas ejection body produced according to the present invention.
即ち、第１図は溶湯攪拌用としての使用例を示し、加熱
炉１内にはルツボ２が設置され、このルツボ２内には金
属溶湯３が保持され、更にルツボ２の底部にはセラミッ
ク製ガス噴出体４をセットし、このガス噴出体４にガス
導入管５を接続し、溶湯３中にガスを噴出して攪拌する
ようにしている。That is, FIG. 1 shows an example of use for stirring molten metal, in which a crucible 2 is installed in a heating furnace 1, a molten metal 3 is held in the crucible 2, and a ceramic material is placed at the bottom of the crucible 2. A gas ejector 4 is set, a gas introduction pipe 5 is connected to the gas ejector 4, and gas is ejected into the molten metal 3 to stir it.
ガス噴出体４は第２図に示すように、全体がリング状と
なっており内部を多孔質４ａとし、外周面及び上下面を
溶湯の侵入を阻止し得る緻密な表皮層４ｂとし、更に内
周面には緻密ではあるがガスを噴出し得る細孔を有する
表皮層４ｃとしている。As shown in FIG. 2, the gas ejecting body 4 has a ring shape as a whole, with a porous interior 4a, a dense skin layer 4b on the outer peripheral surface and upper and lower surfaces that can prevent the intrusion of molten metal, and an inner layer 4b. The peripheral surface has a skin layer 4c having dense pores capable of ejecting gas.
第３図はガスシール用としての使用例を示し、加熱炉１
内にはＭｇ等の空気（酸素）との接触をきらう溶湯３を
保持したルツボ２が設置され、このルツボ２上面を蓋体
６にて気密に塞いでいる。そして蓋体６の中央には開ロ
アを形成し、この開ロア上に金型８をセットするととも
に開ロアから下方へストーク９を垂下し、このストーク
９の中間にガス噴出体４を取付けている。Figure 3 shows an example of its use as a gas seal.
A crucible 2 holding a molten metal 3 such as Mg which should not come into contact with air (oxygen) is installed inside the crucible 2, and the upper surface of the crucible 2 is hermetically closed with a lid 6. Then, an open lower part is formed in the center of the lid body 6, a mold 8 is set on this open lower part, a stalk 9 is suspended downward from the open lower part, and a gas ejecting body 4 is attached to the middle of this stalk 9. There is.
このガス噴出体４はルツボ２内鰐供給された＾ｒ、 Ｎ
２等の不活性ガスをストーク９内へ噴出することで、鋳
造後に金型８を離型する際に空気がストーク９内にある
溶湯３に接触しないようにしている。したがってこのガ
ス噴出体４は上下面を溶湯の侵入を阻止し得る緻密な表
皮層４ｂとし、内周面及び外周面をガスの導入及び噴出
が容易になされる細孔を有する表皮層４ｃとしている。This gas ejection body 4 was supplied to the crucible 2 ^r, N
By blowing out an inert gas such as No. 2 into the stalk 9, air is prevented from coming into contact with the molten metal 3 in the stalk 9 when the mold 8 is released after casting. Therefore, this gas ejecting body 4 has a dense skin layer 4b on the upper and lower surfaces that can prevent the intrusion of molten metal, and a skin layer 4c on the inner and outer peripheral surfaces that has pores through which gas can be easily introduced and ejected. .
次に前記セラミック製ガス噴出体４の製造方法を第４図
乃至第１１図に基いて説明する。Next, a method for manufacturing the ceramic gas ejecting body 4 will be explained with reference to FIGS. 4 to 11.
先ず第４図に示すようにウレタンフオーム等の三次元網
目構造をなす発泡樹脂１ｏを用意する。First, as shown in FIG. 4, a foamed resin 1o having a three-dimensional network structure such as urethane foam is prepared.
次いで発泡樹脂１０を第５図に示すようにセラミックス
ラリ−１１中に浸漬し、第６図の拡大図に示すように発
泡樹脂１ｏの骨格１０ａ表面にセラミックスラリ−１１
を付着せしめる。この付着を促進するには乳棒等によっ
て発泡樹脂１ｏをスラリー中で押したり伸ばしたりする
とよい。Next, the foamed resin 10 is immersed in a ceramic slurry 11 as shown in FIG.
Attach it. In order to promote this adhesion, it is preferable to press or stretch the foamed resin 1o in the slurry using a pestle or the like.
ここで、セラミックスラリ−１１を構成するセラミック
粉末としては、Ｓｉ、Ｎ４．ＳｉＣ，Ａｆｌ、０３゜Ｚ
ｒＯ，、ムライト、コージェライト等を用い、これらを
水又はポリアクリル酸アンモニウム、水溶性フェノール
、アルギン酸アンモニウム等の有機溶剤の溶液（３％程
度）に混合し、粘度が３〜１５ＣＰ程度のスラリーを調
整する。Here, as the ceramic powder constituting the ceramic slurry 11, Si, N4. SiC, Afl, 03°Z
Using rO, mullite, cordierite, etc., these are mixed with water or a solution (about 3%) of an organic solvent such as ammonium polyacrylate, water-soluble phenol, ammonium alginate, etc. to form a slurry with a viscosity of about 3 to 15 CP. adjust.
以上のようにして発泡樹脂１０の骨格にセラミックスラ
リ−１１を付着せしめたならば、第７図に示すように発
泡樹脂１０を石膏型１２内にセットし、発泡樹脂１０と
石膏型１２との隙間にセラミックスラＶ−１３を流し込
む。このセラミックスラリ−１３の成分は前記セラミッ
クスラリ−１１と同一でよいが、粘度については前記セ
ラミックスラリ−１１よりも高粘度とする。具体的には
セラミックスラリ−１３の粘度は２０〜５００ＣＰでチ
クソトロピー性を有するものとする。Once the ceramic slurry 11 has been attached to the skeleton of the foamed resin 10 as described above, the foamed resin 10 is set in the plaster mold 12 as shown in FIG. Pour Ceramic Sura V-13 into the gap. The components of this ceramic slurry 13 may be the same as those of the ceramic slurry 11, but the viscosity is higher than that of the ceramic slurry 11. Specifically, the ceramic slurry 13 has a viscosity of 20 to 500 CP and is thixotropic.
この粘度範囲とする理由は、２０ＣＰ未満とすると、発
泡樹脂１０内にセラミックスラリ−１３が入り込み、５
ｏｏｃｐを超えると隙間の中に充填しにくくなることに
よる。The reason for this viscosity range is that if the viscosity is less than 20CP, the ceramic slurry 13 will enter the foamed resin 10.
This is because if it exceeds oocp, it becomes difficult to fill the gap.
このようにして、型１２と発泡樹脂１０との隙間にセラ
ミックスラリ−１３を充填したならば、型内で固化せし
める。その結果第８図及び第８図のＡ−Ａ線断面図であ
る第９図に示すように、内部を多孔質１４ａとし、外周
面、内周面及び上下面を緻密な表皮層１４ｂとした成形
体１４が得られる。ここで表皮層１４ｂの厚さについて
は内周面に形成する表皮層１４ｂを他の部分よりも薄く
なるようにしている。After the ceramic slurry 13 is filled into the gap between the mold 12 and the foamed resin 10 in this manner, it is solidified within the mold. As a result, as shown in FIG. 8 and FIG. 9, which is a cross-sectional view taken along line A-A in FIG. A molded body 14 is obtained. Regarding the thickness of the skin layer 14b, the skin layer 14b formed on the inner peripheral surface is made thinner than other parts.
次いで、成形体１４を型１２から離型し、 １００〜１
５０℃の温度で１〜２時間乾燥せしめ、次いで２００〜
３００℃の温度で２〜３時間脱脂する。斯かる加熱処理
により成形体１４中へ発泡樹脂１０は燃焼飛散し、第１
０図に示すようにセラミックのみからなる三次元網目構
造体１５が得られる。Next, the molded body 14 is released from the mold 12, and 100 to 1
Dry at a temperature of 50°C for 1-2 hours, then dry at a temperature of 200°C.
Degrease for 2-3 hours at a temperature of 300°C. By such heat treatment, the foamed resin 10 is burned and scattered into the molded body 14, and the first
As shown in Figure 0, a three-dimensional network structure 15 made only of ceramic is obtained.
この後上記三次元網目構造体１５を６５０℃程度で１時
間、１２００℃程度で２時間仮焼成し、更に１７００〜
１７５０℃で２時間本焼成し目的とするガス噴出体４を
得る。Thereafter, the three-dimensional network structure 15 was pre-fired at about 650°C for 1 hour, at about 1200°C for 2 hours, and further heated at about 1700°C.
Main firing is performed at 1750° C. for 2 hours to obtain the desired gas ejecting body 4.
即ち、焼成前の三次元網目構造体１５の内周面には、外
周面及び上下面に形成された表皮層よりも薄い表皮層が
形成されており、この薄い表皮層は前記焼成工程におい
て他の表皮層よりも大きく収縮するため、内周面の表皮
層には微細な気孔が形成されることとなる。したがって
前記したように上下面及び外周面が溶湯の侵入を阻止し
得る緻密な表皮層４ｂとし、内周面をガスの噴出が容易
になされる細孔を有する表皮層４ｃとしたガス噴出体４
が得られる。That is, a skin layer thinner than the skin layers formed on the outer peripheral surface and the upper and lower surfaces is formed on the inner peripheral surface of the three-dimensional network structure 15 before firing, and this thin skin layer is Since the skin layer contracts more than the skin layer on the inner peripheral surface, fine pores are formed in the skin layer on the inner circumferential surface. Therefore, as described above, the gas ejecting body 4 has the upper and lower surfaces and the outer circumferential surface formed with a dense skin layer 4b that can prevent the intrusion of molten metal, and the inner circumferential surface formed with a skin layer 4c having pores through which gas can be easily ejected.
is obtained.
尚、前記した方法にあっては、微細な気孔を形成するた
めに、表皮層を薄くして焼成するようにしたが、第１１
図に示すように酸処理を行うようにしてもよい。In the method described above, the skin layer is thinned and fired in order to form fine pores.
An acid treatment may be performed as shown in the figure.
つまり、ガス噴出体４の上下面及び外周面を酢酸ビニル
等からなるシート！６で被覆し、内周面を露出した状態
で酸液１７中に浸漬し、内周面に微細な気孔を形成する
ようにしてもよい。In other words, the upper and lower surfaces and the outer peripheral surface of the gas ejecting body 4 are made of vinyl acetate or the like! 6 and immersed in the acid solution 17 with the inner circumferential surface exposed to form fine pores on the inner circumferential surface.
（発明の効果）
以上に説明した如く本発明によれば、溶湯の攪拌用、ガ
スシール用或いは清浄用フィルター等として、極めて微
細な気孔を有するセラミック製ガス噴出体を得ることが
できる。(Effects of the Invention) As described above, according to the present invention, it is possible to obtain a ceramic gas ejection body having extremely fine pores, which can be used as a filter for stirring molten metal, gas sealing, or cleaning.
第１図乃至第３図は本発明方法によって製造したガス噴
出体の使用例を示す図、第４図乃至第１１図は製造工程
を順に示した図である。
尚、図面中、３は溶湯、４はガス噴出体、４ａは多孔質
、４ｂ、４ｃは表皮層、１０は発泡樹脂、１１．１３は
セラミックスラリ−１１４は成形体である。
特 許 出 願 人 本田技研工業株式会社代理人
弁理士 下 １）容−即問 弁理士
大 橋 邦 産量 弁理士 小
山 有第４図
第６図
０ａ
第５図
第８図
第９図
第１０図
第１１図FIGS. 1 to 3 are diagrams showing an example of use of a gas ejection body manufactured by the method of the present invention, and FIGS. 4 to 11 are diagrams showing the manufacturing steps in order. In the drawings, 3 is a molten metal, 4 is a gas ejection body, 4a is a porous body, 4b and 4c are skin layers, 10 is a foamed resin, 11.13 is a ceramic slurry, and 114 is a molded body. Patent applicant: Agent for Honda Motor Co., Ltd.
Patent Attorney Part 2 1) Yong-Immediate Question Patent Attorney
Kuni Ohashi Production volume Patent attorney Small
Yama Yu Figure 4 Figure 6 Figure 0a Figure 5 Figure 8 Figure 9 Figure 10 Figure 11
Claims (3)
リー中に浸漬して発泡樹脂の骨格表面にセラミックスラ
リーを付着せしめ、次いでセラミックスラリーが付着し
た発泡樹脂を型内にセットし、この型と発泡樹脂との隙
間にセラミックスラリーを流し込み、この後セラミック
スラリーを乾燥固化せしめるとともに発泡樹脂を燃焼飛
散させ、次いでセラミックを焼成することで表面を緻密
な表皮層とし内部を多孔質とするようにしたセラミック
製ガス噴出体の製造方法。(1) A foamed resin having a three-dimensional network structure is immersed in a ceramic slurry to adhere the ceramic slurry to the skeletal surface of the foamed resin.Then, the foamed resin with the ceramic slurry attached is set in a mold, and this mold and the foamed resin are placed in a mold. Ceramic slurry is poured into the gap between the resin and the ceramic slurry is dried and solidified, the foamed resin is burned and scattered, and then the ceramic is fired to create a dense skin layer on the surface and a porous interior. A method for producing a manufactured gas ejection body.
部に形成する表皮層については薄肉とするようにしたこ
とを特徴とする請求項１記載のセラミック製ガス噴出体
の製造方法。(2) The method for manufacturing a ceramic gas ejecting body according to claim 1, characterized in that, of the dense skin layer, the skin layer formed at the gas introduction part or the gas ejection part is made thin.
部に形成する表皮層については酸処理を行うようにした
ことを特徴とする請求項１記載のセラミック製ガス噴出
体の製造方法。(3) The method for manufacturing a ceramic gas ejecting body according to claim 1, characterized in that, of the dense skin layer, the skin layer formed at the gas introduction part or the ejection part is subjected to acid treatment. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63038872A JP2556875B2 (en) | 1988-02-22 | 1988-02-22 | Method for manufacturing ceramic gas ejector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63038872A JP2556875B2 (en) | 1988-02-22 | 1988-02-22 | Method for manufacturing ceramic gas ejector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01215770A true JPH01215770A (en) | 1989-08-29 |
| JP2556875B2 JP2556875B2 (en) | 1996-11-27 |
Family
ID=12537304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63038872A Expired - Lifetime JP2556875B2 (en) | 1988-02-22 | 1988-02-22 | Method for manufacturing ceramic gas ejector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2556875B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03232555A (en) * | 1990-02-09 | 1991-10-16 | Ngk Insulators Ltd | Air diffusing plate |
| JPH04175275A (en) * | 1990-11-08 | 1992-06-23 | Kamiyama:Kk | Production of porous ceramic plate |
| JPH04175276A (en) * | 1990-11-08 | 1992-06-23 | Kamiyama:Kk | Porous ceramic plate |
| JP2006122829A (en) * | 2004-10-29 | 2006-05-18 | Sanki Gomme Kk | Ceramic filter element and its manufacturing method |
| US7832458B2 (en) | 2005-09-01 | 2010-11-16 | Actech Gmbh | Method for producing a casting mold from a composite mold material for foundry purposes |
| TWI615377B (en) * | 2013-04-02 | 2018-02-21 | Ngk Insulators Ltd | Method for manufacturing composite refractory and composite refractory |
-
1988
- 1988-02-22 JP JP63038872A patent/JP2556875B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03232555A (en) * | 1990-02-09 | 1991-10-16 | Ngk Insulators Ltd | Air diffusing plate |
| JPH04175275A (en) * | 1990-11-08 | 1992-06-23 | Kamiyama:Kk | Production of porous ceramic plate |
| JPH04175276A (en) * | 1990-11-08 | 1992-06-23 | Kamiyama:Kk | Porous ceramic plate |
| JP2006122829A (en) * | 2004-10-29 | 2006-05-18 | Sanki Gomme Kk | Ceramic filter element and its manufacturing method |
| US7832458B2 (en) | 2005-09-01 | 2010-11-16 | Actech Gmbh | Method for producing a casting mold from a composite mold material for foundry purposes |
| TWI615377B (en) * | 2013-04-02 | 2018-02-21 | Ngk Insulators Ltd | Method for manufacturing composite refractory and composite refractory |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2556875B2 (en) | 1996-11-27 |
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