JPH0657625B2 - Method for producing ceramic porous body - Google Patents
Method for producing ceramic porous bodyInfo
- Publication number
- JPH0657625B2 JPH0657625B2 JP2282723A JP28272390A JPH0657625B2 JP H0657625 B2 JPH0657625 B2 JP H0657625B2 JP 2282723 A JP2282723 A JP 2282723A JP 28272390 A JP28272390 A JP 28272390A JP H0657625 B2 JPH0657625 B2 JP H0657625B2
- Authority
- JP
- Japan
- Prior art keywords
- ceramic
- porous body
- product
- firing
- ceramic porous
- 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.)
- Expired - Lifetime
Links
- 239000000919 ceramic Substances 0.000 title claims description 51
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 238000010304 firing Methods 0.000 claims description 16
- 230000004907 flux Effects 0.000 claims description 12
- 238000000465 moulding Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 12
- 239000003208 petroleum Substances 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- 238000011049 filling Methods 0.000 claims description 6
- 239000008187 granular material Substances 0.000 description 17
- 239000011248 coating agent Substances 0.000 description 8
- 239000000295 fuel oil Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000000576 coating method Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 3
- -1 glaze Chemical compound 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000012188 paraffin wax Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000012149 noodles Nutrition 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、例えば透水性舗装板として用いられるセラミ
ック多孔体を低コストで製造することができるセラミッ
ク多孔体の製造法に関するものであり、特に製品表面の
粒のつぶれのないセラミック多孔体の製造法に関するも
のである。TECHNICAL FIELD The present invention relates to a method for producing a ceramic porous body, which can produce a ceramic porous body used as, for example, a water-permeable pavement plate at low cost, and in particular, The present invention relates to a method for producing a ceramic porous body having no grain collapse on the surface of a product.
（従来の技術） 従来、透水性舗装板等に使用されているセラミック多孔
体を製造するには、焼成品であるセラミック骨材や陶磁
器を破砕し篩分したセルベンに水ガラス、釉薬等のガラ
ス質のフラックスとメチルセルロース、ポリビニールア
ルコール等の一時的粘結剤としての保形剤とを添加し、
これをプレス成形したうえ再度焼成して製品とする方法
が採用されていた。(Prior Art) Conventionally, to manufacture a ceramic porous body that has been used for a water-permeable pavement plate, etc., a ceramic aggregate that is a fired product or cerben that is sieved by crushing ceramics and water glass, glass such as glaze, etc. Quality flux and shape-retaining agent as a temporary binding agent such as methylcellulose and polyvinyl alcohol,
A method has been adopted in which this is press-molded and then fired again to obtain a product.
ところがこのような従来の製造法はセラミック多孔体を
形成する骨材の焼成と成形品の焼成との２回の焼成を行
っていたために焼成コストが高くなるという問題点があ
った。However, such a conventional manufacturing method has a problem that the firing cost becomes high because firing is performed twice, that is, firing of the aggregate forming the ceramic porous body and firing of the molded product.
そこで本発明者等は骨材を焼成することなく多孔体形状
に成形し、１回の焼成で骨材の焼結と結合剤による固化
とを行い完成品を得ることができるようにする試みをく
り返した。しかし、未焼成の骨材は機械的強度も低くつ
ぶれやすいためそのまま多孔体形状に圧縮成形すると圧
壊に伴ない多孔体の気孔率が低下するとともに、表面の
粒のつぶれにより製品としての外観が悪くなり、商品価
値がなくなるという欠点があった。特に吸湿性の大きい
造粒骨材を用いて多孔体を製造する場合には、造粒骨材
が吸湿すると一層機械的強度が低下するため所定の気孔
率を有する多孔体が得られ難く、また多孔体表面の骨材
もつぶれ易く、表面粒子のつぶれの少ない所定の気孔率
を有する多孔体形状に圧縮成形することは困難であっ
た。Therefore, the inventors of the present invention attempted to obtain a finished product by molding the aggregate into a porous body shape without firing and firing the aggregate once and solidifying with the binder in one firing. Repeated. However, since uncalcined aggregate has low mechanical strength and is easily crushed, if it is directly compression-molded into a porous body, the porosity of the porous body will be reduced due to crushing, and the appearance of the product will be poor due to the crushing of the surface grains. However, there was a drawback that the commercial value was lost. In particular, when producing a porous body using a granulated aggregate having a large hygroscopic property, it is difficult to obtain a porous body having a predetermined porosity because the mechanical strength further lowers when the granulated aggregate absorbs moisture, and Aggregates on the surface of the porous body were also easily crushed, and it was difficult to perform compression molding into a porous body having a predetermined porosity with less crushing of surface particles.
（発明が解決しようとする課題） 本発明はこのような従来の問題を解決して、１回の焼成
で骨材の焼結と結合剤（フラックス）の固化とを行って
セラミック多孔体を製造することができ、しかも骨材の
つぶれを生じにくくして商品価値を大幅に高めることが
できるセラミック多孔体の製造方法を提供するために完
成されたものである。(Problems to be Solved by the Invention) The present invention solves such a conventional problem and manufactures a ceramic porous body by sintering an aggregate and solidifying a binder (flux) in one firing. The present invention has been completed in order to provide a method for producing a ceramic porous body, which is capable of suppressing the collapse of aggregates and significantly increasing the commercial value.
（課題を解決するための手段） 上記の課題は、液状の石油類を表面に被覆した未焼成の
セラミック造粒物にフラックスと保形剤とを添加混合
し、型に充填して成形し焼成することを特徴とするセラ
ミック多孔体の製造法によって解決することができる。(Means for Solving the Problem) The above-mentioned problem is to add and mix a flux and a shape-retaining agent to an unfired ceramic granulated product whose surface is coated with liquid petroleum, and then fill and mold the shaped product into a shaped body and fire it. This can be solved by a method for manufacturing a ceramic porous body characterized by
また上記の課題は、未焼成のセラミック造粒物にフラッ
クスと保形剤とを添加混合したうえ、型の少なくとも一
つの面に粒のつぶれを防止するための緩衝シートが敷か
れた型内に充填して成形し焼成することを特徴とするセ
ラミック多孔体の製造法によって解決することができ
る。Further, the above-mentioned problem is that, in addition to mixing and mixing a flux and a shape-retaining agent with an unfired ceramic granulated product, a buffer sheet for preventing crushing of particles is spread on at least one surface of the mold in a mold. The problem can be solved by a method for manufacturing a ceramic porous body, which is characterized by filling, molding and firing.
更に上記の課題は、表面に液状の石油類がコーティング
された未焼成のセラミック造粒物にフラックスと保形剤
とを添加混合したうえ、底面に粒のつぶれを防止するた
めの緩衝シート敷かれた金型の内部に充填してプレス成
形し焼成することを特徴とするセラミック多孔体の製造
法によって解決することができる。Further, the above-mentioned problem is to add a flux and a shape-retaining agent to an unfired ceramic granulated product whose surface is coated with liquid petroleum, and to lay a buffer sheet on the bottom face to prevent the crushing of the particles. This can be solved by a method for manufacturing a ceramic porous body, which comprises filling the inside of a die, press-forming and firing.
このように、本発明においては好ましくは直径が０．６
〜４mm程度の球形又は円柱状に造粒されたセラミック造
粒物を水分が３％以下となるまで乾燥させ、未焼成のま
まのセラミック造粒物の表面に、例えばＡ重油やパラフ
ィンのような液状の石油類の被膜を形成する。ここで水
分が３％を越えるとセラミック造粒物の生強度が低下す
るので好ましくない。この液状の石油類の被覆の目的
は、セラミック造粒物の乾燥及び乾燥強度の低下を防
ぎ、更に表面の滑りを良くし成形能を向上させることで
あり、更に低圧成形が可能となり、粒のつぶれが防止で
きる。Ａ重油の場合はその量は造粒物100重量部に対し
て５〜10重量部とすればよい。なおセラミック造粒物の
表面に被覆された液状の石油類は焼成の際に分解飛散さ
れてしまい、製品表面には残留することがない。Thus, in the present invention, the diameter is preferably 0.6
Approximately 4 mm or so spherical or columnar ceramic granules are dried until the water content is 3% or less, and the surface of the unsintered ceramic granules such as A heavy oil or paraffin is dried. It forms a liquid petroleum film. Here, if the water content exceeds 3%, the green strength of the ceramic granules is reduced, which is not preferable. The purpose of coating this liquid petroleum is to prevent the drying and drying strength of the ceramic granules from decreasing and to improve the slipperiness of the surface to improve the molding ability. Crushing can be prevented. In the case of heavy oil A, the amount may be 5 to 10 parts by weight with respect to 100 parts by weight of the granulated product. The liquid petroleum coated on the surface of the ceramic granules is decomposed and scattered during firing and does not remain on the surface of the product.
第１図のグラフは被覆剤の違いによる成形圧力と製品乾
燥嵩密度との関係を示したもので、Ａ重油を用いると低
い成形圧力で大きい製品乾燥嵩密度が得られることが示
されている。また第２図は被覆剤の違いによる被膜量と
製品乾燥嵩密度との関係を示したものである。The graph of FIG. 1 shows the relationship between the molding pressure and the product dry bulk density due to the difference in the coating material, and it is shown that when A heavy oil is used, a large product dry bulk density can be obtained at a low molding pressure. . FIG. 2 shows the relationship between the coating amount and the dry bulk density of the product due to the difference in the coating material.
このように液状の石油類が表面に被覆されたセラミック
造粒物に対し次に、好ましくはガラス質のフラックスと
保形剤とが添加される。フラックスは造粒物80〜95重量
部に対し５〜２０重量部を粉末として添加する。また保
形剤としては例えば澱粉質のデキストリンを２〜３重量
部添加すればよい。Next, a flux, preferably vitreous, and a shape-retaining agent are added to the ceramic granules thus coated with liquid petroleum. 5 to 20 parts by weight of flux is added as powder to 80 to 95 parts by weight of the granulated product. As the shape-retaining agent, for example, starch dextrin may be added in an amount of 2 to 3 parts by weight.
そしてフラックスと保形剤とが添加されセラミック造粒
物は金型の内部でプレス成形されるのであるが、普通に
プレス成形した場合には上記のように液状の石油類の被
覆を行ってもなお、第４図Ｂに示すように金型と接触す
る部分のセラミック造粒物がつぶれることが避けられな
い。そこで本発明では第３図に示すように、底面に粒の
つぶれを防止するための緩衝シート(1)が敷かれた金型
(2)の内部にセラミック造粒物を充填してプレス成形す
る。ここで緩衝シート(1)としてはゴムあるいは合成樹
脂系の材質からなる多数の独立気泡を有する厚さ１〜４
mm程度のシートが適当である。このように緩衝シート
(1)を敷いたうえで例えば0.2〜5.0Kg/cm2の圧力でプレ
ス成形すれば、第４図Ａに示すように緩衝シート(1)と
接する側の製品表面の粒のつぶれを大幅に減少させるこ
とができる。なお、プレスとともに振動を加えれば、更
に成形充填性を高めることができる。Then, the flux and the shape-retaining agent are added and the ceramic granules are press-molded inside the mold, but in the case of normal press-molding, even if liquid petroleum is coated as described above. In addition, as shown in FIG. 4B, it is unavoidable that the ceramic granules in the portion in contact with the mold are crushed. Therefore, in the present invention, as shown in FIG. 3, a mold having a cushioning sheet (1) laid on the bottom surface for preventing the particles from being crushed.
The inside of (2) is filled with ceramic granules and press-molded. Here, the buffer sheet (1) has a thickness of 1 to 4 having a large number of closed cells made of rubber or a synthetic resin material.
A sheet of about mm is suitable. Buffer sheet like this
If (1) is laid and press-formed with a pressure of 0.2 to 5.0 Kg / cm 2 , for example, as shown in FIG. 4A, the crushing of grains on the product surface on the side in contact with the cushioning sheet (1) is significantly reduced. Can be reduced. If vibration is applied together with the press, the mold filling property can be further improved.
次に本発明の実施例を示す。Next, examples of the present invention will be described.
（実施例） SiO260〜70％、Al2O320〜24％、K2O＋Na2O3.5〜5.5％、
Fe2O30.2％以下、TiO21.0％以下、CaO0.5以下、MgO0.5
％以下、Ｉｇｌｏｓｓ5.5〜9.5％の窯業原料に５％以下
の金属酸化物顔料を添加し、14〜16％の水分を加えて混
練したうえ、造粒機の孔明板から直径が0.6〜0.4mm程度
のヌードル状となるように押圧した。 (Example) SiO 2 60~70%, Al 2 O 3 20~24%, K 2 O + Na 2 O3.5~5.5%,
Fe 2 O 3 0.2% or less, TiO 2 1.0% or less, CaO 0.5 or less, MgO 0.5
% Or less, Igloss 5.5 to 9.5% of ceramic raw material with 5% or less of metal oxide pigment added, 14 to 16% of water added and kneaded, and a diameter of 0.6 to 0.4 from the perforated plate of the granulator. It was pressed so as to form a noodle shape of about mm.
次にこれを整粒機により平均粒径の±50％以内に全体の
95％以上が入るように整粒した。このように造粒された
球状のセラミック造粒物を水分が３％以下となるまで乾
燥したうえ、そのセラミック造粒物の表面にＡ重油を被
覆した。Ａ重油はセラミック造粒物100重量部に対して
５〜10重量部とすることが好ましく、石油類の一種であ
るパラフィン等を用いた場合よりも成形充填性を高める
ことができる。Next, use a sieving machine to adjust this to within ± 50% of the average particle size.
The particles were sized so that 95% or more could enter. The spherical ceramic granulated product thus granulated was dried until the water content became 3% or less, and then the surface of the ceramic granulated product was coated with heavy oil A. The heavy oil A is preferably used in an amount of 5 to 10 parts by weight with respect to 100 parts by weight of the ceramic granules, and the molding and filling properties can be improved as compared with the case of using paraffin, which is one kind of petroleum.
なお、Ａ重油をセラミック造粒物の表面に被覆させた場
合はＡ重油の被膜層は極めて薄く、かつセラミック造粒
物の表面層の内部に若干含浸された状態にあるものと思
われる。しかし高粘性のパラフィンをセラミック造粒物
の表面に被膜させた場合は、被膜層即ちコーティング層
がＡ重油の場合に比べかなり厚くなるものと思われる。
また固体化し剥離する危険性も高くなる。When the surface of the ceramic granulated product is coated with A heavy oil, it is considered that the coating layer of A heavy oil is extremely thin and the surface layer of the ceramic granulated product is slightly impregnated. However, when a highly viscous paraffin is coated on the surface of the ceramic granule, the coating layer, that is, the coating layer, is considered to be considerably thicker than in the case of heavy oil A.
Further, the risk of solidification and peeling increases.
次にこの石油類が被覆されたセラミック造粒物80〜95重
量部に粉末状のガラス質のフラックス５〜20重量部と保
形剤２〜３重量部とを添加して混練し、底面に独立気泡
を有し厚さが３mmのポリエチレン製の緩衝シートを敷い
た金型内に充填し、プレス成形機により５kg/cm2の圧力
で平板状に成形した。Next, 5 to 20 parts by weight of a powdery glassy flux and 2 to 3 parts by weight of a shape retention agent are added to 80 to 95 parts by weight of the petroleum-coated ceramic granules and kneaded to form a bottom surface. It was filled in a mold provided with a polyethylene cushioning sheet having closed cells and having a thickness of 3 mm, and molded into a flat plate by a press molding machine at a pressure of 5 kg / cm 2 .
その成形品を常法により炉内で１２８０±２０℃の温度
で焼成したところ、造粒物の焼成と同時に成形体全体の
焼結固化も同時に完了でき、しかも製品表面の粒のつぶ
れがほとんどないセラミック多孔体が１回の焼成により
得られた。When the molded product was fired in a furnace at a temperature of 1280 ± 20 ° C by a conventional method, the sintering and solidification of the entire molded product could be completed at the same time as the firing of the granulated product, and there was almost no crushing of the particles on the product surface. The ceramic porous body was obtained by firing once.
得られたセラミック多孔体は100kg/cm2以上の曲げ強度
を持ち、またJIS A 5403に規定されている透水時間は５
〜60秒であって、優れた透水性を示した。なお、上述の
緩衝シートを被成形体の上面と下面に、または上面のみ
に設けてプレス成形しても同一の効果が得られる。The obtained ceramic porous body has a bending strength of 100 kg / cm 2 or more, and the water permeability time specified in JIS A 5403 is 5
It was ~ 60 seconds and showed excellent water permeability. The same effect can be obtained even if the above-described cushioning sheet is provided on the upper surface and the lower surface of the body to be molded, or only on the upper surface, and press-molded.
（発明の効果） 以上に説明したように、第１及び第３の発明は未焼成の
セラミック造粒物の表面に液状の石油類を被覆すること
によりセラミック造粒物の生強度を高めて粒のつぶれを
防止したもので、外観に優れ商品価値の高いセラミック
多孔体を製造することができる。また第２、第３の発明
によれば、底面に粒のつぶれを防止するための緩衝シー
トが敷かれた金型の内部にセラミック造粒物を充填して
プレス成形することにより粒のつぶれを防止するので、
外観に優れ商品価値の高いセラミック多孔体を製造する
ことができる。更に本発明によれば、１回の焼成により
セラミック造粒物の焼結と結合剤による固化とを同時に
行ってセラミック多孔体を得ることができるので製造コ
ストを低減でき、セラミック造粒物の取扱いが容易とな
るので製造工程における作業性を向上させることができ
るものである。しかも本発明により製造されたセラミッ
ク多孔体は従来法により製造されたものと同様の気孔率
や透水性を有するものであり、透水性舗装板等に用いる
に適したものである。(Effect of the invention) As described above, the first and third inventions improve the green strength of the ceramic granules by coating the surface of the unsintered ceramic granules with liquid petroleum. It is possible to manufacture a porous ceramic body which is excellent in appearance and has high commercial value by preventing the crushing of the porous material. Further, according to the second and third inventions, the ceramic granules are filled in the inside of a mold having a buffer sheet for preventing the particles from being crushed on the bottom surface and press-molded to prevent the particles from crushing. To prevent
It is possible to manufacture a ceramic porous body having an excellent appearance and a high commercial value. Further, according to the present invention, since it is possible to obtain the ceramic porous body by simultaneously performing the sintering of the ceramic granules and the solidification with the binder by one firing, it is possible to reduce the manufacturing cost and handle the ceramic granules. Therefore, the workability in the manufacturing process can be improved. Moreover, the ceramic porous body produced by the present invention has the same porosity and water permeability as those produced by the conventional method, and is suitable for use in a water-permeable pavement board or the like.
よって本発明は従来の問題点を一掃したセラミック多孔
体の製造法として、産業の発展に寄与するところは極め
てて大である。Therefore, the present invention is extremely large in that it contributes to the industrial development as a method for producing a ceramic porous body that eliminates the conventional problems.
第１図は本発明における被覆剤の違いによる成形圧力と
製品乾燥嵩密度との関係を示したグラフ、第２図は本発
明における被覆剤の違いによるコーティング量と製品乾
燥嵩密度との関係を示したグラフ、第３図は本発明のプ
レス成形工程を示す断面図、第４図は製品表面の粒のつ
ぶれ状態を示す拡大断面図であり、Ａは本発明品、Ｂは
従来品である。 (1)：緩衝シート、(2)：金型。FIG. 1 is a graph showing the relationship between the molding pressure and the product dry bulk density according to the difference of the coating agent in the present invention, and FIG. 2 shows the relationship between the coating amount and the product dry bulk density according to the difference of the coating agent in the present invention. The graph shown in FIG. 3, FIG. 3 is a cross-sectional view showing the press molding process of the present invention, FIG. 4 is an enlarged cross-sectional view showing the crushed state of the particles on the product surface, A is the product of the present invention, and B is the conventional product. . (1): Buffer sheet, (2): Mold.
Claims (3)
ラミック造粒物にフラックスと保形剤とを添加混合し、
型に充填して成形し焼成することを特徴とするセラミッ
ク多孔体の製造法。1. A flux and a shape-retaining agent are added to and mixed with an unfired ceramic granulated product having a surface coated with liquid petroleum,
A method for producing a ceramic porous body, which comprises filling a mold, molding and firing.
保形剤とを添加混合したうえ、型の少なくとも一つの面
に粒のつぶれを防止するための緩衝シートが敷かれた型
内に充填して成形し焼成することを特徴とするセラミッ
ク多孔体の製造法。2. A non-fired ceramic granulated product is mixed with a flux and a shape-retaining agent, and is filled in a mold in which at least one surface of the mold is covered with a buffer sheet for preventing the particles from being crushed. A method for producing a ceramic porous body, which comprises:
未焼成のセラミック造粒物にフラックスと保形剤とを添
加混合したうえ、底面に粒のつぶれを防止するための緩
衝シートが敷かれた金型の内部に充填してプレス成形し
焼成することを特徴とするセラミック多孔体の製造法。3. A flux and shape-retaining agent are added to and mixed with an unfired ceramic granulated product whose surface is coated with liquid petroleum, and a buffer sheet for preventing the crushing of the particle is laid on the bottom surface. A method for producing a ceramic porous body, which comprises filling the inside of a die, press-molding and firing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2282723A JPH0657625B2 (en) | 1990-10-20 | 1990-10-20 | Method for producing ceramic porous body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2282723A JPH0657625B2 (en) | 1990-10-20 | 1990-10-20 | Method for producing ceramic porous body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04160075A JPH04160075A (en) | 1992-06-03 |
| JPH0657625B2 true JPH0657625B2 (en) | 1994-08-03 |
Family
ID=17656207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2282723A Expired - Lifetime JPH0657625B2 (en) | 1990-10-20 | 1990-10-20 | Method for producing ceramic porous body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0657625B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010086419A (en) * | 2001-07-23 | 2001-09-12 | 김준규 | Fabrication of porous (Ba,Sr)TiO3 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6311559A (en) * | 1986-06-30 | 1988-01-19 | ブラザー工業株式会社 | Manufacture of self-lubricating composite material |
-
1990
- 1990-10-20 JP JP2282723A patent/JPH0657625B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04160075A (en) | 1992-06-03 |
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