JPH04367578A - Porous sintered compact and its production - Google Patents
Porous sintered compact and its productionInfo
- Publication number
- JPH04367578A JPH04367578A JP16620391A JP16620391A JPH04367578A JP H04367578 A JPH04367578 A JP H04367578A JP 16620391 A JP16620391 A JP 16620391A JP 16620391 A JP16620391 A JP 16620391A JP H04367578 A JPH04367578 A JP H04367578A
- Authority
- JP
- Japan
- Prior art keywords
- magnesia
- sintered body
- range
- volume
- organic beads
- 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.)
- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000011148 porous material Substances 0.000 claims abstract description 48
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 30
- 239000011324 bead Substances 0.000 claims abstract description 25
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 238000005245 sintering Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 239000011230 binding agent Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 6
- 238000009826 distribution Methods 0.000 abstract description 9
- 229920000642 polymer Polymers 0.000 abstract description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 abstract description 4
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 abstract description 3
- 239000011369 resultant mixture Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 17
- 239000000843 powder Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、多孔質焼結体及びその
製造方法に関し、更に詳しくはアルミナを含むマグネシ
ア焼結体からなり軽量であり、かつ強度が大きく、また
低熱容量であって炉材やサヤ材に適する球状閉気孔を有
する多孔質焼結体及びその製造方法に関する。[Industrial Application Field] The present invention relates to a porous sintered body and a method for manufacturing the same, and more specifically, the present invention relates to a porous sintered body and a method for manufacturing the same, and more specifically, it is made of a magnesia sintered body containing alumina, is lightweight, has high strength, and has a low heat capacity. The present invention relates to a porous sintered body having spherical closed pores suitable for use as wood and pod wood, and a method for manufacturing the same.
【０００２】0002
【従来の技術】焼結体は、粉末を成形、焼成して製造さ
れるが、緻密な焼結体を得るには最蜜充填法に沿った粒
子の混合を行ない、またいわゆるレンガに代表されるよ
うに、多孔質焼結体は、破砕粉を各種の粒度に分け各種
粒度配合を行い、これらをバインダーと共に混合した後
、成形して焼結することにより製造している。[Prior Art] Sintered bodies are manufactured by molding and firing powder, but in order to obtain dense sintered bodies, particles are mixed according to the densest packing method. As described above, porous sintered bodies are manufactured by dividing crushed powder into various particle sizes, blending them with various particle sizes, mixing these with a binder, and then shaping and sintering.
【０００３】この多孔質焼結体には、開気孔又は連続気
孔と言われるものと閉気孔又は独立気孔と言われるもの
とがあるが、炉材やセッター材の用途にはガスの拡散を
防止する目的で閉気孔の焼結体が用いられる。このよう
な多孔質焼結体の製造に際しては、経験的に粒度構成を
考えて粒子の混合を行なうことにより焼結体の気孔率を
制御することが行なわれていた。There are two types of porous sintered bodies: those with open pores or continuous pores, and those with closed pores or independent pores, but they are used as furnace materials and setter materials to prevent gas diffusion. A closed-pore sintered body is used for this purpose. When manufacturing such a porous sintered body, the porosity of the sintered body has been controlled by mixing particles based on the particle size structure based on experience.
【０００４】0004
【発明が解決しようとする課題】しかしながら、多孔質
焼結体の製造方法は、経験的に粒度構成を考えて粒子の
混合を行なうので、得られた焼結体の気孔分布、即ち気
孔の形状、気孔の平均粒径等が不均一で、しかも気孔の
量、即ち気孔率の制御を十分行なうことができなかった
。[Problems to be Solved by the Invention] However, in the method of manufacturing a porous sintered body, particles are mixed by considering the particle size composition empirically, so it is difficult to determine the pore distribution of the obtained sintered body, that is, the shape of the pores. The average particle size of the pores was non-uniform, and the amount of pores, that is, the porosity could not be sufficiently controlled.
【０００５】更に気孔そのものが粒子と粒子のすき間で
あるため、その大きさも不揃いであり、微細な気孔が均
一に分散された材料を作ることができなかった。したが
って、従来の多孔質焼結体の製造方法では、多孔質焼結
体の強度が弱く薄物などの高級な炉材製品を製造するこ
とが困難であった。Furthermore, since the pores themselves are gaps between particles, their sizes are also irregular, making it impossible to create a material in which fine pores are uniformly dispersed. Therefore, in the conventional method for manufacturing a porous sintered body, the strength of the porous sintered body is low, making it difficult to manufacture high-quality furnace material products such as thin products.
【０００６】そこで、本発明者等は、前記の問題点であ
る気孔サイズ、気孔分布等の不均一が生じない多孔質焼
結体、特に多孔質マグネシア焼結体について種々研究し
た結果、原料マグネシアに有機質ビーズを混合すること
により初期の課題が解決されることを見出した。Therefore, the present inventors conducted various studies on porous sintered bodies, particularly porous magnesia sintered bodies, which do not suffer from the above-mentioned problems of non-uniformity in pore size, pore distribution, etc., and found that the raw material magnesia It was discovered that the initial problem could be solved by mixing organic beads with.
【０００７】更にマグネシアにアルミナを１０重量％〜
３５重量％を配合することでマグネシアの特性を損なわ
ずに高強度材料が得られることを見出した。本発明は、
これらの知見に基づいて成されたものである。したがっ
て、本発明が解決しようとする課題は、気孔サイズ、気
孔分布の均一で強度に優れた薄物などの高級な炉材製品
を得ることができる多孔質焼結体及びその製造方法を得
ることにある。[0007] Furthermore, 10% by weight of alumina is added to magnesia.
It has been found that by blending 35% by weight, a high-strength material can be obtained without impairing the properties of magnesia. The present invention
This was done based on these findings. Therefore, the problem to be solved by the present invention is to obtain a porous sintered body and a method for producing the same, which can yield high-grade furnace material products such as thin products with uniform pore size and distribution and excellent strength. be.
【０００８】[0008]
【課題を解決するための手段】前記発明が解決するため
の手段は、以下の（１）から（３）の事項によりそれぞ
れ達成される。
（１）アルミナを含むマグネシア焼結体の気孔径が１μ
ｍ〜５０μｍの範囲で気孔形態が微細な球状閉気孔であ
ることを特徴とする多孔質焼結体。Means for Solving the Problems The means for solving the problems described above are achieved by the following items (1) to (3). (1) The pore diameter of the magnesia sintered body containing alumina is 1μ
A porous sintered body characterized in that the pores are fine spherical closed pores in the range of m to 50 μm.
【０００９】（２）平均粒径１μｍ〜２０μｍの微粉マ
グネシアに平均粒径１μｍ〜２０μｍの微粉アルミナを
１０重量％〜３５重量％を配合した原料に粒径３μｍ〜
５０μｍの有機質ビーズを１容量％〜２０容量％と有機
質バインダーとを添加混合した後、成形し、得られた成
形体を昇温し、１４００℃〜１６００℃の範囲で焼結す
ることを特徴とする多孔質焼結体の製造方法。(2) A raw material prepared by blending 10% to 35% by weight of finely divided alumina with an average particle size of 1 μm to 20 μm to finely powdered magnesia with an average particle size of 1 μm to 20 μm, and a particle size of 3 μm to 20 μm.
It is characterized by adding and mixing 1% to 20% by volume of 50 μm organic beads and an organic binder, then molding, raising the temperature of the obtained molded body, and sintering in the range of 1400°C to 1600°C. A method for producing a porous sintered body.
【００１０】（３）前記第２項記載の昇温において、３
５０℃未満までは、有機質ビーズの添加量が１容量％〜
１０容量％の範囲内で昇温速度は５０℃／時間以下であ
り、有機質ビーズの添加量が１０容量％を越えて２０容
量％までの範囲内では昇温速度は２０℃／時間以下であ
り、更に３５０℃から焼結温度までは昇温速度は２００
℃／時間以下であることを特徴とする多孔質焼結体の製
造方法。(3) In the temperature increase described in item 2 above, 3
Below 50℃, the amount of organic beads added is 1% by volume or more.
The heating rate is 50°C/hour or less within the range of 10% by volume, and the heating rate is 20°C/hour or less when the amount of organic beads added exceeds 10% by volume and reaches 20% by volume. , furthermore, the temperature increase rate from 350℃ to the sintering temperature is 200℃.
A method for producing a porous sintered body, characterized in that the temperature is less than or equal to ℃/hour.
【００１１】以下、本発明を更に詳しく説明する。本発
明の閉気孔又は独立気孔を有する多孔質マグネシアにア
ルミナを配合した焼結体は、気孔サイズ、気孔分布等が
均一であるため、強度に優れており、また微粉マグネシ
アに有機質ビーズを混合して成形したものを１４００℃
〜１６００℃の範囲で焼結するので、気孔サイズ、気孔
分布等が均一のものが得られる。The present invention will be explained in more detail below. The sintered body of the present invention, which is made by mixing alumina with porous magnesia having closed or independent pores, has a uniform pore size and distribution, so it has excellent strength. molded at 1400℃
Since sintering is performed at a temperature in the range of ~1600°C, a product with uniform pore size, pore distribution, etc. can be obtained.
【００１２】更に焼結温度までの昇温速度を限定したの
で、気孔の形状として揃った球状とすることができると
ともに、一層の気孔サイズ、気孔分布等の均一のものが
得られる。本発明に用いられる原料のマグネシアとして
は、電融マグネシア、マグネシアクリンカー等が使用さ
れる。Furthermore, since the rate of temperature increase up to the sintering temperature is limited, the pores can be formed into a uniform spherical shape, and the pore size and distribution can be made even more uniform. As the raw material magnesia used in the present invention, fused magnesia, magnesia clinker, etc. are used.
【００１３】配合原料としては、アルミナとマグネシア
の組成でアルミナを１０重量％〜３５重量％配合したも
のが使用される。これらのアルミナとマグネシアは、そ
れぞれ粉砕して、平均粒径１μｍ〜２０μｍの粉末原料
とする。更に好ましくは１μｍ〜１０μｍである。[0013] As a blending raw material, a composition of alumina and magnesia is used, in which alumina is blended in an amount of 10% by weight to 35% by weight. These alumina and magnesia are each ground into powder raw materials having an average particle size of 1 μm to 20 μm. More preferably, it is 1 μm to 10 μm.
【００１４】平均粒径が１μｍより小さいと粉砕コスト
及び粉末原料の取扱の点から好ましくなく、また平均粒
径が２０μｍを越えるときは、成形、焼結により粒界が
大きく残り高強度化が図れない。本発明では、マグネシ
アにアルミナを１０重量％〜３５重量％配合することに
よりマグネシアの特性を失わずに高強度を得ることがで
きる。[0014] If the average particle size is smaller than 1 μm, it is unfavorable from the viewpoint of crushing cost and handling of the powder raw material, and if the average particle size exceeds 20 μm, the grain boundaries remain large due to compaction and sintering, and high strength cannot be achieved. do not have. In the present invention, high strength can be obtained without losing the properties of magnesia by blending 10% to 35% by weight of alumina with magnesia.
【００１５】本発明は多孔質焼結体が球状の均一な閉気
孔又は独立気孔を形成するために有機質ビーズを用いる
もので、この有機質ビーズの形状は球形で、粒径が３μ
ｍ〜５０μｍの各種の粒度を有するもので、目的に応じ
て選択することができる。この有機質ビーズの材質とし
ては、各種のものが用いられるが、比較的低温度で分解
し揮散するものが好ましく、例えばメタクリル酸重合体
、スチレン重合体等が良好に用いられる。[0015] The present invention uses organic beads to form spherical uniform closed pores or closed pores in a porous sintered body, and the organic beads are spherical in shape and have a particle size of 3 μm.
It has various particle sizes ranging from m to 50 μm, and can be selected depending on the purpose. Various materials can be used for the organic beads, but materials that decompose and volatilize at relatively low temperatures are preferred, and for example, methacrylic acid polymers, styrene polymers, etc. are well used.
【００１６】本発明では、原料のアルミナ配合マグネシ
アに添加する有機質ビーズの添加量は、１容量％〜２０
容量％であり、通常の方法で混合する。有機質ビーズの
添加量が１容量％より少ないときは、均一な気孔ができ
ず、また２０容量％を越えると閉気孔とすることが困難
となる。本発明では、原料のマグネシアに有機質ビーズ
を添加すると共に成形できるようにまたは成形品の取扱
が可能であるように、これらに有機質バインダーを通常
１重量％〜１５重量％添加する。In the present invention, the amount of organic beads added to the alumina-containing magnesia raw material ranges from 1% by volume to 20% by volume.
% by volume and mixed in the usual manner. When the amount of organic beads added is less than 1% by volume, uniform pores cannot be formed, and when it exceeds 20% by volume, it becomes difficult to form closed pores. In the present invention, organic beads are added to magnesia as a raw material, and an organic binder is usually added in an amount of 1% to 15% by weight to enable molding or handling of molded products.
【００１７】この有機質バインダーとしては、ポリビニ
ルアルコールやポリエチレングリコール（ＰＥＧ）など
の市販の有機質バインダー等が使用される。多孔質焼結
体の気孔の大きさは、１μｍ〜５０μｍの範囲で用いる
ことが好ましく、５０μｍを越えると肉薄製品の場合に
、強度低下が起こり好ましくない。マグネシア焼結体の
場合、体積収縮率が約２０％であるので、有機質ビーズ
のサイズより若干小さな気孔となる。As this organic binder, commercially available organic binders such as polyvinyl alcohol and polyethylene glycol (PEG) are used. The size of the pores in the porous sintered body is preferably in the range of 1 μm to 50 μm, and if it exceeds 50 μm, the strength will decrease in the case of a thin product, which is not preferable. In the case of a magnesia sintered body, the volume shrinkage rate is about 20%, so the pores are slightly smaller than the size of the organic beads.
【００１８】また微細気孔の分布は、焼結体中に均一に
分布させることが重要であり、そのためには原料のマグ
ネシアと有機質ビーズを十分に混合することが必要であ
る。混合には、通常この技術分野において用いられる混
合機が用いられ、また成形には同様にプレス法や押し出
し法等の通常の成形手段が用いられる。更に焼成には、
通常電気炉等が用いられる。[0018] Furthermore, it is important to uniformly distribute the fine pores in the sintered body, and for this purpose, it is necessary to sufficiently mix the raw material magnesia and organic beads. For mixing, a mixer commonly used in this technical field is used, and for molding, a common molding method such as a press method or an extrusion method is similarly used. Furthermore, for firing,
Usually, an electric furnace or the like is used.
【００１９】本発明の多孔質アルミナ配合マグネシア焼
結体の製造方法において、３５０℃未満までは、有機質
ビーズの添加量が１容量％〜１０容量％の範囲内で昇温
速度が５０℃／時間以下であり、有機質ビーズの添加量
が１０容量％を越えて２０容量％までの範囲内では昇温
速度が２０℃／時間以下であり、更に３５０℃から焼結
温度までは昇温速度が２００℃／時間以下であるのは、
混合された有機質ビーズが、２００℃〜３００℃で分解
し、揮散するため成形体の脱脂は、３５０℃付近までは
ゆっくり昇温させる必要があるためである。In the method for producing a porous alumina-containing magnesia sintered body of the present invention, the heating rate is 50°C/hour when the amount of organic beads added is within the range of 1% by volume to 10% by volume below 350°C. If the amount of organic beads added is more than 10% by volume and up to 20% by volume, the temperature increase rate is 20℃/hour or less, and from 350℃ to the sintering temperature, the temperature increase rate is 200℃/hour or less. °C/hour or less is
This is because the mixed organic beads decompose and volatilize at 200°C to 300°C, so it is necessary to slowly raise the temperature to around 350°C to degrease the molded body.
【００２０】したがって、昇温速度が大きいと有機質ビ
ーズの分解が急速すぎて、成形体にクラックが入ったり
、膨れ上がる等の弊害が発生し好ましくない。成形体の
焼結温度は、１４００℃〜１６００℃で行なう。本発明
の製造方法で得られた閉気孔又は独立気孔を有する多孔
質マグネシア焼結体は、高級炉材、セッター、サヤ材等
に有用であり、肉薄ものから肉厚の材料まで、各種のも
のに適応できるものである。[0020] Therefore, if the temperature increase rate is too high, the organic beads will decompose too quickly, causing problems such as cracking and swelling of the molded product, which is not preferable. The molded body is sintered at a temperature of 1400°C to 1600°C. The porous magnesia sintered body having closed or independent pores obtained by the production method of the present invention is useful for high-grade furnace materials, setters, sheath materials, etc., and is useful for various materials from thin to thick materials. It can be adapted to
【００２１】[0021]
【実施例】以下、本発明を実施例をもって更に詳しく説
明するが、本発明は、これらの例に限定されるものでは
ない。
実施例
原料であるアルミナ及び電融マグネシアをそれぞれ微粉
砕し、これを分級して平均粒径５μｍのものを得、これ
らを乾式混合する。EXAMPLES The present invention will be explained in more detail with reference to examples below, but the present invention is not limited to these examples. Alumina and electrofused magnesia, which are raw materials of the example, are each finely pulverized and classified to obtain particles having an average particle size of 5 μm, and these are dry mixed.
【００２２】この５μｍのアルミナ混合電融マグネシア
１００ｇにメタクリル酸重合体ビーズを１５容量％添加
し、更に有機質バインダーとしてポリビニルアルコール
を３重量％添加して十分に混合する。To 100 g of this 5 μm alumina-mixed electrofused magnesia, 15% by volume of methacrylic acid polymer beads were added, and further, 3% by weight of polyvinyl alcohol as an organic binder was added and thoroughly mixed.
【００２３】このようにして得られた混練物を２００Ｋ
ｇ／ｃｍ２ で加圧してプレス成形した後、これを電気
炉で３５０℃までは２０℃／ｈｒで昇温し、ついで１６
００℃まで１５０℃／ｈｒで昇温した。更に１６００℃
で１時間加熱した。得られた結果を表１に示す。[0023] The kneaded material thus obtained was heated to 200K.
After press-forming under pressure at
The temperature was raised to 00°C at a rate of 150°C/hr. Further 1600℃
It was heated for 1 hour. The results obtained are shown in Table 1.
【００２４】[0024]
【表１】[Table 1]
【００２５】表１から明らかなように、気孔の形状は、
球状であり、しかも気孔が均一に分散された焼結体が得
られたばかりでなく、高強度のものが得られた。また曲
げ強度も従来のものに比べ格段に優れたいることが分か
る。本発明の焼結体は、マグネシアの特性を備えている
ため特にセッター材料に有用である。As is clear from Table 1, the shape of the pores is
Not only was a sintered body that was spherical and had pores evenly distributed, but also had high strength. It can also be seen that the bending strength is significantly superior to that of conventional products. The sintered body of the present invention has the characteristics of magnesia and is therefore particularly useful as a setter material.
【００２６】[0026]
【発明の効果】本発明は、閉気孔又は独立気孔であるた
め炉材、セッター材、サヤ材等の用途に使用される。ま
た原料のアルミナ配合マグネシアに有機質ビーズを含有
させたものを焼成するので、気孔サイズ、気孔分布等が
均一のものが得られるばかりでなく、高強度に優れ、軽
量な肉薄品の製造が可能であり、その上熱ショックに強
いものが得られる。[Effects of the Invention] Since the present invention has closed pores or independent pores, it can be used for applications such as furnace materials, setter materials, and pod materials. In addition, since we sinter the raw material, alumina-blended magnesia, containing organic beads, we can not only obtain products with uniform pore size and pore distribution, but also make it possible to manufacture lightweight, thin-walled products with excellent high strength. Moreover, it is resistant to heat shock.
【００２７】更に焼結温度までの昇温速度を限定したの
で、気孔の形状として揃った球状とすることができると
ともに、一層の気孔サイズ、気孔分布等の均一のものが
得られる。Furthermore, since the rate of temperature rise up to the sintering temperature is limited, the pores can be formed into a uniform spherical shape, and the pore size and distribution can be made even more uniform.
Claims (3)
孔径が１μｍ〜５０μｍの範囲で気孔形態が微細な球状
閉気孔であることを特徴とする多孔質焼結体。1. A porous sintered body containing alumina, characterized in that the pore diameter of the magnesia sintered body is in the range of 1 μm to 50 μm, and the pores are fine spherical closed pores.
ネシアに平均粒径１μｍ〜２０μｍの微粉アルミナを１
０重量％〜３５重量％を配合した原料に粒径３μｍ〜５
０μｍの有機質ビーズを１容量％〜２０容量％と有機質
バインダーとを添加混合した後、成形し、得られた成形
体を昇温し、１４００℃〜１６００℃の範囲で焼結する
ことを特徴とする多孔質焼結体の製造方法。[Claim 2] Finely powdered alumina having an average particle size of 1 μm to 20 μm is added to finely powdered magnesia having an average particle size of 1 μm to 20 μm.
Particle size of 3 μm to 5 μm to the raw material containing 0% to 35% by weight
It is characterized by adding and mixing 1% to 20% by volume of 0 μm organic beads and an organic binder, then molding, heating the obtained molded body, and sintering in the range of 1400°C to 1600°C. A method for producing a porous sintered body.
℃未満までは、有機質ビーズの添加量が１容量％〜１０
容量％の範囲内で昇温速度は５０℃／時間以下であり、
有機質ビーズの添加量が１０容量％を越えて２０容量％
までの範囲内では昇温速度は２０℃／時間以下であり、
更に３５０℃から焼結温度までは昇温速度は２００℃／
時間以下であることを特徴とする多孔質焼結体の製造方
法。3. In the temperature increase according to claim 2, 350
Below ℃, the amount of organic beads added is 1% to 10% by volume.
The temperature increase rate is 50°C/hour or less within the range of volume %,
The amount of organic beads added exceeds 10% by volume and is 20% by volume.
Within the range up to, the heating rate is 20°C/hour or less,
Furthermore, the temperature increase rate from 350℃ to the sintering temperature is 200℃/
A method for manufacturing a porous sintered body, characterized in that the manufacturing time is less than 3 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16620391A JPH04367578A (en) | 1991-06-12 | 1991-06-12 | Porous sintered compact and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16620391A JPH04367578A (en) | 1991-06-12 | 1991-06-12 | Porous sintered compact and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04367578A true JPH04367578A (en) | 1992-12-18 |
Family
ID=15827007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16620391A Withdrawn JPH04367578A (en) | 1991-06-12 | 1991-06-12 | Porous sintered compact and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04367578A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07223879A (en) * | 1994-02-07 | 1995-08-22 | Kanebo Ltd | Ceramic raw material |
| JPH07232974A (en) * | 1994-02-17 | 1995-09-05 | Kanebo Ltd | Porous piezoelectric ceramic element and its production |
| JP2002316870A (en) * | 2001-04-19 | 2002-10-31 | Nitsukatoo:Kk | Member for heat treatment consisting of zirconia sintered compact |
| JP2003040688A (en) * | 2001-07-25 | 2003-02-13 | Nitsukatoo:Kk | Lightweight ceramic sintered compact |
| JP2004083371A (en) * | 2002-08-28 | 2004-03-18 | National Institute For Materials Science | Process for producing ceramic porous body |
| JP2006342054A (en) * | 2006-06-19 | 2006-12-21 | National Institute For Materials Science | Ceramic porous body |
| JP2017024987A (en) * | 2011-09-20 | 2017-02-02 | エボニック レーム ゲゼルシャフト ミット ベシュレンクテル ハフツングＥｖｏｎｉｋ Ｒｏｅｈｍ ＧｍｂＨ | Method for producing light ceramic materials |
-
1991
- 1991-06-12 JP JP16620391A patent/JPH04367578A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07223879A (en) * | 1994-02-07 | 1995-08-22 | Kanebo Ltd | Ceramic raw material |
| JPH07232974A (en) * | 1994-02-17 | 1995-09-05 | Kanebo Ltd | Porous piezoelectric ceramic element and its production |
| JP2002316870A (en) * | 2001-04-19 | 2002-10-31 | Nitsukatoo:Kk | Member for heat treatment consisting of zirconia sintered compact |
| JP2003040688A (en) * | 2001-07-25 | 2003-02-13 | Nitsukatoo:Kk | Lightweight ceramic sintered compact |
| JP2004083371A (en) * | 2002-08-28 | 2004-03-18 | National Institute For Materials Science | Process for producing ceramic porous body |
| JP2006342054A (en) * | 2006-06-19 | 2006-12-21 | National Institute For Materials Science | Ceramic porous body |
| JP2017024987A (en) * | 2011-09-20 | 2017-02-02 | エボニック レーム ゲゼルシャフト ミット ベシュレンクテル ハフツングＥｖｏｎｉｋ Ｒｏｅｈｍ ＧｍｂＨ | Method for producing light ceramic materials |
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