JPH02279554A - Ceramic structure and its production - Google Patents
Ceramic structure and its productionInfo
- Publication number
- JPH02279554A JPH02279554A JP1096504A JP9650489A JPH02279554A JP H02279554 A JPH02279554 A JP H02279554A JP 1096504 A JP1096504 A JP 1096504A JP 9650489 A JP9650489 A JP 9650489A JP H02279554 A JPH02279554 A JP H02279554A
- Authority
- JP
- Japan
- Prior art keywords
- ceramic
- growth
- substance
- ceramic structure
- grains
- 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.)
- Pending
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 61
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000000126 substance Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 11
- 230000002401 inhibitory effect Effects 0.000 claims abstract description 9
- 230000001737 promoting effect Effects 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 4
- 239000003966 growth inhibitor Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 claims description 2
- 238000005245 sintering Methods 0.000 abstract description 5
- 229910052581 Si3N4 Inorganic materials 0.000 abstract description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 4
- 229910010271 silicon carbide Inorganic materials 0.000 abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract 2
- 229910002370 SrTiO3 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
- 239000000292 calcium oxide Substances 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 229910003465 moissanite Inorganic materials 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 238000009792 diffusion process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000011224 oxide ceramic Substances 0.000 description 2
- 229910052574 oxide ceramic Inorganic materials 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
- 229910021332 silicide Inorganic materials 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229910021355 zirconium silicide Inorganic materials 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Ceramic Capacitors (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、複合化されたセラミックス構造物及びその製
造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a composite ceramic structure and a method for manufacturing the same.
［従来の技術］
近年、酸化アルミニウムや酸化ジルコニウム等のような
酸化物系セラミックスや、炭化ケイ素、窒化ケイ素、サ
イアロン等のケイ化系セラミックスを用いたセラミック
ス構造物が実用化されている。[Prior Art] In recent years, ceramic structures using oxide ceramics such as aluminum oxide and zirconium oxide, and silicide ceramics such as silicon carbide, silicon nitride, and sialon have been put into practical use.
特にケイ化系セラミックスには、高温強度が大きいこと
、高温での耐酸化性が優れていること等の利点があり、
高温ガスタービン部品や自動車エンジン部品等の高温雰
囲気でも使用され得る構造物として幅広い応用が期待さ
れている。In particular, silicide-based ceramics have advantages such as high high-temperature strength and excellent oxidation resistance at high temperatures.
It is expected to find a wide range of applications as structures that can be used in high-temperature environments, such as high-temperature gas turbine parts and automobile engine parts.
しかしながら、これら従来のセラミックス構造物には、
加工上及び取扱上不可避な表面傷を生ずると、外部応力
が集中してこわれやすく、信頓性に欠ける点があった。However, these conventional ceramic structures have
When unavoidable surface scratches occur during processing and handling, external stress concentrates and the product tends to break, resulting in a lack of reliability.
これらの欠点を解消するための方法としては、従来から
種々の方法が提案されている。Various methods have been proposed to overcome these drawbacks.
例えば、セラミックスの表面に、石英ガラスのような熱
膨張係数の小さな層を設け、常温でこの層に圧縮応力が
加わることを利用して、表面傷の影響を軽減し、高強度
化、高信頼化を図ることが提案されている。For example, by creating a layer with a small coefficient of thermal expansion such as quartz glass on the surface of ceramics, and taking advantage of the fact that compressive stress is applied to this layer at room temperature, the effect of surface scratches can be reduced, resulting in higher strength and reliability. It is proposed that the
また特開昭６１−１８６２５７号公報には、第２図のセ
ラミックス構造物の組織構造説明図に示すように、使用
時に外部応力を受ける構造物の表面層１１を構成するセ
ラミックス粒子の粒径が構造物内部１２を構成するセラ
ミックス粒子の粒径よりも大きいという限定された条件
で、任意の部位を任意の程度粒成長を促進させたセラミ
ックス構造物が開示されている。Furthermore, as shown in the explanatory diagram of the microstructure of a ceramic structure in FIG. A ceramic structure is disclosed in which grain growth is promoted in any part to any extent under the limited condition that the grain size is larger than the grain size of the ceramic particles constituting the interior 12 of the structure.
［発明が解決しようとする課題］
しかしながら、従来の上記の特開昭６１−１８６２５７
号公報に開示されたようなセラミックス構造体では、構
造物表面１１が構造物内部１２より粒径が大きいことの
みに限定しているので、構造物表面において、各部位ご
とに構造物内部に比較して任意の程度成長させることに
よる複合化については提案されていない。[Problem to be solved by the invention] However, the above-mentioned conventional Japanese Patent Application Laid-open No. 186257/1983
In the ceramic structure disclosed in the above publication, since the structure surface 11 is limited to having a larger grain size than the structure interior 12, each part of the structure surface is compared with the structure interior. No proposal has been made regarding compounding by growing to an arbitrary degree.
またそれに伴う収縮、伸長を積極的に利用することによ
る成型についても示されていない。Furthermore, there is no indication of molding that actively utilizes the shrinkage and elongation associated with this.
即ち本発明の目的は、鋳込み、射出成型、金型成型、押
出し、ドクターブレード等の従来法で作られたセラミッ
クス構造体の成形体に、簡単な工程により任意の部位を
任意の程度に収縮・伸長するセラミックス構造体及びそ
の製造法を提供することにある。That is, the object of the present invention is to shrink or shrink any part to any degree by a simple process into a molded ceramic structure made by conventional methods such as casting, injection molding, die molding, extrusion, or doctor blade. An object of the present invention is to provide an elongated ceramic structure and a method for manufacturing the same.
［課題を解決するための手段］
本発明は、セラミックス部品において、該セラミックス
粒の成長促進物質及び／又は成長抑制物質を該セラミッ
クス表面に塗布又は印刷し、焼結してなるセラミックス
構造物であり、
セラミックス粉末とバインダーを混合成型し、得られた
成型物を任意の形状に成形し、該成形物の表面にセラミ
ックス粒の成長促進物質及び／又は成長抑制物質を印刷
塗布し、次いで焼結することからなるセラミックス構造
物の製造方法である。[Means for Solving the Problems] The present invention provides a ceramic structure in which a growth promoting substance and/or a growth inhibiting substance for the ceramic grains are coated or printed on the surface of the ceramic part and then sintered. , Mix and mold ceramic powder and a binder, mold the resulting molded product into any shape, print and apply a growth promoting substance and/or growth inhibiting substance for ceramic grains on the surface of the molded product, and then sinter it. This is a method for manufacturing a ceramic structure comprising the following steps.
そして前記セラミックス構造物及びその製造法において
、セラミックス粒の成長促進物質として、Ｍ ｇ Ｏ、
Ｚ ｒ Ｏ２を、また成長抑制物質として、ＣａＯ，Ｓ
ｉＯ２，ＴｉＯ２から選ばれた１種を用いることを特徴
とし、
さらに、セラミックスとしては、Ａ ｉ） ２０ ａ、
５ｒＴｉＯ、ＺｒＯＳ ＭｇＯ１５ｉＣＳ Ｓｉ３Ｎ４
、サイアロンから選ばれた１種又は２種以上を用いるこ
とを特徴とするセラミックス構造物及びその製造方法で
ある。In the ceramic structure and the manufacturing method thereof, M g O,
Z r O2, and as growth inhibitors, CaO, S
It is characterized by using one type selected from iO2, TiO2, and furthermore, as the ceramic, A i) 20 a,
5rTiO, ZrOS MgO15iCS Si3N4
The present invention provides a ceramic structure and a method for manufacturing the same, characterized by using one or more types selected from , and sialon.
［作用］
本発明における、セラミックス構造物の粒成長を促進或
いは抑制する物質は、表面に塗布印刷された後、焼結時
に内部に拡散することにより、拡散領域の化学組成を変
化させて、母相に対して粒径が相対的に大きく或いは小
さくなることにより、その効果を発揮する。[Function] In the present invention, the substance that promotes or suppresses grain growth of the ceramic structure is coated and printed on the surface and then diffused into the interior during sintering, thereby changing the chemical composition of the diffusion region and improving the matrix. This effect is exerted by making the particle size relatively large or small with respect to the phase.
また有効に拡散が起こる温度と焼結が起こる温度が異な
る場合、拡散が起こる温度に適当な時間保持することに
より、焼結を起こさせること無く拡散をコントロールす
ることが可能である。Further, when the temperature at which effective diffusion occurs and the temperature at which sintering occurs are different, by holding the temperature at which diffusion occurs for an appropriate time, it is possible to control the diffusion without causing sintering.
また塗布又は印刷という手段を用いることにより印刷物
質、その濃度、印刷回数等を適宜選択することにより、
任意の部位を任意の程度上記物質を付着させることが可
能である。In addition, by using coating or printing means, by appropriately selecting the printing substance, its density, the number of times of printing, etc.
It is possible to attach the above-mentioned substance to any part and to any extent.
次に本発明の実施例について述べる。Next, embodiments of the present invention will be described.
〔実施例］
［実施例１］
ｍ１図ａ、ｂは、Ａｇ２Ｏ３のセラミックス構造物に本
発明を適用した場合の説明図である。[Example] [Example 1] Figures m1 a and b are explanatory views when the present invention is applied to a ceramic structure of Ag2O3.
第１図において、１はセラミックス構造物、２は塗布印
刷面、３は中心部の斜線部分、４は裏面、５は半球面体
である。In FIG. 1, 1 is a ceramic structure, 2 is a coated printing surface, 3 is a hatched area in the center, 4 is a back surface, and 5 is a hemisphere.
粒径ｌｌｌｆｆ１のＡｇ２Ｏ３よりなる粉末及びパイン
グーとしてポリビニルアルコール２ｗｔ％を加え・、ｌ
Ｏ〜２０１１１１Ｉφ、厚さＩＩＩＩＩＩｔの円板状に
成形し、次に成形体を黒鉛製の型に入れ、加圧力２５０
〜３００ｋｇ、−’ ｃ＋Ｊでホットプレスにて成型し
た。Add 2 wt% of polyvinyl alcohol as a powder made of Ag2O3 with a particle size of lllff1 and pine goo.
Formed into a disk shape with O~201111Iφ and thickness IIIIIIt, then put the formed body into a graphite mold and pressurized with a pressure of 250
~300 kg, -'c+J was molded using a hot press.
このＡ Ｄ ２０３よりなるセラミックス構造物１の円
板の片面２に、Ｍ ｇ Ｑ 、 Ｚ ｒ ０２といっ
た粒成長抑制物質１０ｗｔ％とポリビニルアルコールＬ
Ｏｖｔ９ｏの混合水溶液を１回印刷（厚さｌＯ〜２０ｐ
） Ｌ、図示するように中心部の斜線部分３を、更に２
回印すリした。On one side 2 of the disk of the ceramic structure 1 made of this AD 203, 10 wt % of a grain growth inhibiting substance such as M g Q , Z r 02 and polyvinyl alcohol L
Print a mixed aqueous solution of Ovt9o once (thickness lO~20p)
) L, as shown in the figure, the shaded area 3 in the center is further expanded by 2
I sent a stamp.
一方それと異なる裏面４に、Ｃａｂ、５ｉ０２゜ＴｌＯ
２といった粒成長促進物質１０ｖｔ％とポリビニルアル
コール１０ｖｔ％の混合水溶液を上記片面２と同様に度
印刷し、このセラミックス構造物１の円板を１６００℃
×５時間焼結した。On the other hand, on the back side 4, which is different from that, Cab, 5i02°TlO
A mixed aqueous solution of 10vt% of a grain growth promoting substance such as No. 2 and 10vt% of polyvinyl alcohol was printed on one side in the same manner as in the above single side 2, and the disk of this ceramic structure 1 was heated at 1600°C.
Sintering was performed for ×5 hours.
この結果、第２図すに示すような曲率がコントロールさ
れた半球面体５を得た。As a result, a hemispherical body 5 with controlled curvature as shown in FIG. 2 was obtained.
得られたセラミックス構造物の半球面体５は、内部が収
縮され、外部が伸長されたセラミックス構造物である。The hemispherical body 5 of the obtained ceramic structure is a ceramic structure in which the inside is contracted and the outside is expanded.
［実施例２〕
セラミックスとして、５ｒＴｉ０３よりなる粉末を使用
した以外実施例１と同条件にて、１０〜２０１φＸ １
ｍｍ ｔの円板状に成形し、次いで成形体を型に入れ
、加圧成形し５ｒＴＩＯ３よりなるセラミックス構造物
の円板を得た。[Example 2] Under the same conditions as Example 1 except that powder made of 5rTi03 was used as the ceramic, 10 to 201φ
The molded body was molded into a disc shape of mm t, and then the molded body was placed in a mold and pressure-molded to obtain a disc of a ceramic structure made of 5rTIO3.
次に実施例１と同様にその円板にＳ ｒ ０２を厚さｌ
Ｏ〜４０１Ｊ！＋にて塗布し、実施例１と同様に焼結し
た。Next, as in Example 1, S r 02 was applied to the disk to a thickness l.
O~401J! + and sintered in the same manner as in Example 1.
その結果、第２図すに示すような曲率が実施例１より大
きい半球面体５を得た。As a result, a hemispherical body 5 having a larger curvature than that of Example 1 as shown in FIG. 2 was obtained.
以上の如く、本実施例においては円板形状の場合につい
て述べたが、本発明のセラミックス構造物の形状はこれ
に限定されるものでは無く、ロール形他各種の形状に適
用することが可能である。As mentioned above, in this example, the case of a disk shape was described, but the shape of the ceramic structure of the present invention is not limited to this, and can be applied to various shapes such as a roll shape. be.
また印刷回数或いは粒成長促進又は抑制物質の濃度を変
えることにより、セラミックス構造物の任意の部位に圧
意の程度収縮又は伸長が可能となる。Furthermore, by changing the number of times of printing or the concentration of the grain growth promoting or inhibiting substance, it is possible to contract or expand the desired region of the ceramic structure.
本発明の適用されるセラミックスとしては、前記実施例
１のＡ Ｎ ２０’ａ 、実施例２の５ｒＴｉ０３に限
定されず、酸化ジルコニウムＺｒＯ、酸化マグネシウム
ＭｇＯ等の酸化物系セラミックスや、炭化ケイ素ＳｉＣ
，窒化ケイ素５１３Ｎ４やサイアロン等のようなケイ化
物系セラミックスがある。Ceramics to which the present invention is applied are not limited to A N 20'a in Example 1 and 5rTi03 in Example 2, but include oxide ceramics such as zirconium oxide ZrO and magnesium oxide MgO, and silicon carbide SiC.
, silicide ceramics such as silicon nitride 513N4 and Sialon.
［発明の効果〕
本発明のセラミックス構造物及びその製造方法によれば
、粒成長を促進、或いは抑制する物質をセラミックス構
造体の表面に塗布又は印刷するという簡１１１な手段を
用いることにより、半球面体のようなｈ ９化されたセ
ラミックス構造体を容易に得ることが出来る効果がある
ものである。[Effects of the Invention] According to the ceramic structure and the manufacturing method thereof of the present invention, by using a simple method of coating or printing a substance that promotes or suppresses grain growth on the surface of the ceramic structure, a hemispherical structure can be formed. This has the effect that it is possible to easily obtain a ceramic structure with h9, such as a face piece.
第１図ａ、ｂは本実施例の説明図、第２図は従来のセラ
ミックス構造物の組織構造説明図である。
図において、１：セラミックス構造物、２：塗布印刷面
、３：中心部の斜線部分、４：裏面、５、半球面体、１
１：表面層、１２：内部。1A and 1B are explanatory diagrams of this embodiment, and FIG. 2 is an explanatory diagram of the structure of a conventional ceramic structure. In the figure, 1: Ceramic structure, 2: Coated printing surface, 3: Shaded area in the center, 4: Back surface, 5, Hemisphere, 1
1: surface layer, 12: inside.
Claims (6)
の成長促進物質及び／又は成長抑制物質を該セラミック
ス表面に塗布又は印刷し、焼結してなることを特徴とす
るセラミックス構造物。(1) A ceramic structure characterized in that a growth promoting substance and/or a growth inhibiting substance for the ceramic grains are coated or printed on the surface of the ceramic and sintered.
Ｏ又はＺｒＯ＿２を、また成長抑制物質として、ＣａＯ
，ＳｉＯ＿２，ＴｉＯ＿２から選ばれた１種を用いるこ
とを特徴とする請求項第１項記載のセラミックス構造物
。(2) Mg as a growth promoting substance for the ceramic grains
O or ZrO_2, and as a growth inhibitor, CaO
2. The ceramic structure according to claim 1, wherein one selected from the group consisting of , SiO_2, and TiO_2 is used.
Ｏ＿３、ＺｒＯ＿２、ＭｇＯ、ＳｉＣ、Ｓｉ＿３Ｎ＿４
、サイアロンから選ばれた１種又は２種以上を用いるこ
とを特徴とする請求項第１項又は第２項記載のセラミッ
クス構造物。(3) As ceramics, Al_2O_3, SrTi
O_3, ZrO_2, MgO, SiC, Si_3N_4
3. The ceramic structure according to claim 1 or 2, characterized in that one or more selected from the group consisting of , and sialon are used.
られた成型物を加圧して、任意の形状に成形し、該成形
物の表面にセラミックス粒の成長促進物質及び／又は成
長抑制物質を印刷塗布し、次いで焼結することを特徴と
するセラミックス構造物の製造方法。(4) Mix and mold ceramic powder and binder, pressurize the resulting molded product, mold it into any shape, and print and coat the surface of the molded product with a growth promoting substance and/or a growth inhibiting substance for ceramic grains. 1. A method for manufacturing a ceramic structure, the method comprising:
Ｏ又はＺｒＯ＿２を、また成長抑制物質として、ＣａＯ
，ＳｉＯ＿２，ＴｉＯ＿２から選ばれた１種を用いるこ
とを特徴とする請求項第４項記載のセラミックス構造物
の製造方法。(5) Mg as a growth promoting substance for the ceramic grains.
O or ZrO_2 and as a growth inhibitor, CaO
5. The method of manufacturing a ceramic structure according to claim 4, wherein one selected from , SiO_2, and TiO_2 is used.
Ｏ＿３、ＺｒＯ＿２、ＭｇＯ、ＳｉＣ、Ｓｉ＿３Ｎ＿４
、サイアロンから選ばれた１種又は２種以上を用いるこ
とを特徴とする請求項第４項又は第５項記載のセラミッ
クス構造物の製造方法。(6) As ceramics, Al_2O_3, SrTi
O_3, ZrO_2, MgO, SiC, Si_3N_4
6. The method for manufacturing a ceramic structure according to claim 4 or 5, characterized in that one or more selected from the group consisting of , and sialon are used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1096504A JPH02279554A (en) | 1989-04-18 | 1989-04-18 | Ceramic structure and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1096504A JPH02279554A (en) | 1989-04-18 | 1989-04-18 | Ceramic structure and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02279554A true JPH02279554A (en) | 1990-11-15 |
Family
ID=14166945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1096504A Pending JPH02279554A (en) | 1989-04-18 | 1989-04-18 | Ceramic structure and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02279554A (en) |
-
1989
- 1989-04-18 JP JP1096504A patent/JPH02279554A/en active Pending
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