JPH03241300A - Dome for high-speed projectile - Google Patents
Dome for high-speed projectileInfo
- Publication number
- JPH03241300A JPH03241300A JP3459990A JP3459990A JPH03241300A JP H03241300 A JPH03241300 A JP H03241300A JP 3459990 A JP3459990 A JP 3459990A JP 3459990 A JP3459990 A JP 3459990A JP H03241300 A JPH03241300 A JP H03241300A
- Authority
- JP
- Japan
- Prior art keywords
- dome
- ceramic
- transparent
- mullite
- spinel
- 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 claims abstract description 41
- 229910052596 spinel Inorganic materials 0.000 claims abstract description 25
- 239000011029 spinel Substances 0.000 claims abstract description 24
- 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 claims abstract description 21
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 21
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 239000000843 powder Substances 0.000 abstract description 5
- 238000005245 sintering Methods 0.000 abstract description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000654 additive Substances 0.000 abstract description 2
- 230000000996 additive effect Effects 0.000 abstract description 2
- 238000007731 hot pressing Methods 0.000 abstract description 2
- 239000000395 magnesium oxide Substances 0.000 abstract description 2
- 239000000470 constituent Substances 0.000 abstract 2
- 229910026161 MgAl2O4 Inorganic materials 0.000 abstract 1
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 230000006698 induction Effects 0.000 description 11
- 239000002131 composite material Substances 0.000 description 7
- 239000011521 glass Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000005083 Zinc sulfide Substances 0.000 description 6
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 6
- 229910001635 magnesium fluoride Inorganic materials 0.000 description 6
- 229910052984 zinc sulfide Inorganic materials 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 206010040844 Skin exfoliation Diseases 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 238000001272 pressureless sintering Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005382 thermal cycling Methods 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Details Of Aerials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ミサイル等の高速飛翔体の先端部に装着され
、内部の電波アンテナや赤外線センサー等の装置を保護
するドーム（ｄｏｍθ）に関スル。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a dome (domθ) that is attached to the tip of a high-speed flying object such as a missile and protects internal devices such as a radio antenna and an infrared sensor. Sur.
ミサイルには地対空、空対空、空対地などの種類がある
が、その誘導方式は電波誘導式と赤外光誘導式とに大別
される。There are various types of missiles, such as surface-to-air, air-to-air, and air-to-ground, but their guidance methods are broadly divided into radio wave guidance and infrared light guidance.
電波誘導式は目標物体の発する電波又は目標物体からの
反射電波を電波アンテナで受信して、目標物体の位置を
確認し誘導するものである。従って、電波誘導式ミサイ
ルのドームは電波を透過しやすい低誘電率ガラス等のガ
ラス材料で作製されていた。しかし、ガラス材料からな
るドームでは、より高速化したミサイル等の飛翔体にお
いては先端部が空力加熱により高温に加熱されるので、
耐熱性が不充分であった。The radio wave guidance type uses a radio antenna to receive radio waves emitted by a target object or reflected radio waves from the target object to confirm the position of the target object and guide it. Therefore, the domes of radio-guided missiles are made of glass materials such as low dielectric constant glass that easily transmit radio waves. However, the tip of a dome made of glass material is heated to a high temperature by aerodynamic heating in faster flying objects such as missiles.
Heat resistance was insufficient.
一方、赤外光誘導式では目標物体の発する赤外光を赤外
線センサーで受光して、目標物体の位置を確認し、誘導
する。従って、赤外光誘導式ミサイルのドームは、弗化
マグネシウム（ＭｇＦ ）や硫化亜鉛（ＺｎＳ ）等の
赤外光透過性の材料で作製されていた。しかし、ＭｇＦ
やＺｎＳ等は硬度が６００以下程度と低いため、大気
中に浮遊する砂粒や氷粒等との衝突により表面が傷付き
透光性が低下しやすい欠点があった。又、耐熱性の点で
も、ＭｇＦやＺｎＳ等は融点又は昇菫点が９００〜１３
００Ｃ’であるため、超高速の飛翔条件下では充分とは
云えなかった。On the other hand, in the infrared light guidance type, an infrared sensor receives infrared light emitted by a target object, confirms the position of the target object, and guides the target object. Therefore, the domes of infrared guided missiles have been made of materials that transmit infrared light, such as magnesium fluoride (MgF) and zinc sulfide (ZnS). However, MgF
Since the hardness of ZnS and the like is as low as about 600 or less, there is a drawback that the surface is easily damaged by collision with sand grains, ice grains, etc. floating in the atmosphere, and the translucency is easily reduced. Also, in terms of heat resistance, MgF, ZnS, etc. have melting points or ascending violet points of 900 to 13
00C', it could not be said to be sufficient under ultra-high-speed flight conditions.
上記した如く、従来の高速飛翔体用ドームは、いずれも
材質的に耐熱性や硬度に問題があった。As mentioned above, all conventional domes for high-speed flying objects have problems in terms of heat resistance and hardness of the materials.
しかも、最近米国ではミサイル誘導の妨害ニ対向するた
め、赤外光誘導式と電波誘導式を組合せた複合誘導式が
研究されているが、従来のドーム材料であるガラス又は
ＭｇＦ やＺｎＳ等では、複合誘導式に適応出来るよ
う赤外光と電波の両方を透過し且つ高速下で耐久性のあ
るドームを作製することが難しかった。Moreover, in recent years in the United States, research has been conducted on a composite guidance system that combines an infrared light guidance system and a radio wave guidance system in order to counter missile guidance jamming, but conventional dome materials such as glass, MgF, and ZnS cannot be used. It has been difficult to create a dome that can transmit both infrared light and radio waves and is durable under high speed conditions so that it can be applied to a composite induction system.
本発明はかかる従来の事情に鑑み、硬度や強度及び耐熱
性に優れ、高速下でも充分な耐久性を有すると共に、将
来の複合誘導式にも対応出来る高速飛翔体用ドームを提
供することを目的とする。In view of such conventional circumstances, an object of the present invention is to provide a dome for high-speed flying objects that has excellent hardness, strength, and heat resistance, has sufficient durability even at high speeds, and is compatible with future composite guidance systems. shall be.
−ｆ、記目的を達成するため、本発明における高速飛翔
体用ドームは、透光性スピネルセラミックスノ部分と、
非透光性ムライト質セラミックスの部分とからなること
を特徴とする。-f. In order to achieve the above object, the dome for a high-speed flying object in the present invention includes a translucent spinel ceramic part,
It is characterized by consisting of a non-transparent mullite ceramic part.
スピネルセラミックスは、マグネシア（ＭｇＯ）とアル
ミナ（Ａｔ Ｏ）よりなる酸化物（ＭｇＡＩＯ）であっ
て、スピネル粉末のホットプレス法や焼結助剤を添加し
た常圧焼結法などにより製造される。製造条件を選択す
ることによって可視光から赤外光まで良好な透光性を有
するものが製造でき、特に波長３〜５μｍの赤外光の透
過性に優れており、表面に反射防止コーティングを施せ
ば更に透光性を向上させることが出来る。又、透光性ス
ピネルセラミックスは電波透過性にも優れている。Spinel ceramics are an oxide (MgAIO) made of magnesia (MgO) and alumina (At 2 O), and are manufactured by hot pressing of spinel powder or pressureless sintering with the addition of a sintering aid. By selecting the manufacturing conditions, it is possible to manufacture products that have good transparency from visible light to infrared light, and are particularly good at transmitting infrared light with a wavelength of 3 to 5 μm, and can be coated with an anti-reflection coating on the surface. Furthermore, the translucency can be further improved. Translucent spinel ceramics also have excellent radio wave transparency.
−２方、ムライト質セラミックスは、ムライト（３ＡＩ
０ ・２ＳｉＯ）を主成分とし、微量のＭｇＯ等の添加
成分を含有する非透光性セラミックスであるが、誘電率
が低く電波透過性に優れている。又、ムライト質セラミ
ックスは、スリップキャスティング法による製造技術が
開発され、比較的大型の材料も比較的安価に製造出来る
利点がある。-On the other hand, mullite ceramics are mullite (3AI
Although it is a non-light-transmitting ceramic containing 0.0 .2SiO) as a main component and a small amount of additive components such as MgO, it has a low dielectric constant and excellent radio wave transparency. Furthermore, a manufacturing technology for mullite ceramics has been developed using the slip casting method, which has the advantage that relatively large materials can be manufactured at relatively low cost.
本発明のドームは、かかる透光性スピネルセラミックス
の部分と非透光性ムライト質七うミックスの部分とから
なり、各部分を耐熱性接着剤で接着するか又はガラスペ
ースト等で接合することにより、所定のドーム形状に構
成したものである。The dome of the present invention is composed of a translucent spinel ceramic part and a non-translucent mullite seven-piece mix, and each part is bonded with a heat-resistant adhesive or glass paste or the like. , which is constructed in a predetermined dome shape.
本発明のドームの一具体例を第１図及び第２図に示した
。ドームは全体が中空の半球状であり、半球の約半分は
透光性スピネルセラミックス１からなり、残りの半分は
非透光性ムライト質セラミックス２で構成され、両者は
耐熱性接着剤で接着しである。赤外光を透過する透光性
スピネルセラミックス１の部分の内側には赤外線センサ
ー３が配置され、非透光性ムライト質セラミックス２の
内側には電波アンテナ４が配置されており、赤外光誘導
式、電波誘導式、及び複合誘導式のいずれにも適用出来
るようになっている。尚、透光性スピネルセラミックス
１の部分と非透光性ムライト質セラミックス２の部分の
大きさは、誘導方式等に応じて相互に調製することが可
能である。A specific example of the dome of the present invention is shown in FIGS. 1 and 2. The dome has a hollow hemispherical shape, and about half of the hemisphere is made of translucent spinel ceramics 1, and the other half is made of non-translucent mullite ceramics 2, both of which are bonded with a heat-resistant adhesive. It is. An infrared sensor 3 is placed inside the translucent spinel ceramic 1 that transmits infrared light, and a radio antenna 4 is placed inside the non-transparent mullite ceramic 2 to guide infrared light. It can be applied to any type, radio wave induction type, and composite induction type. The sizes of the translucent spinel ceramic 1 portion and the non-translucent mullite ceramic 2 portion can be mutually adjusted depending on the induction method and the like.
上記具体例では半球状のドームを図示したが、空気抵抗
の少ない流線形、コーン状、角錐状等のドーム形状も可
能である。In the above specific example, a hemispherical dome is illustrated, but dome shapes such as streamlined, cone-shaped, pyramid-shaped, etc., which have less air resistance, are also possible.
本発明のドームにおいては、−上記の如く透光性スピネ
ルセラミックスの部分が赤外誘導式に、及び非透光性ム
ライト質セラミックスの部分が電波誘導式に夫々対応し
て構成され、従って複合誘導式にも対応することが可能
である。In the dome of the present invention, as described above, the translucent spinel ceramic portion is configured to correspond to the infrared induction type, and the non-transparent mullite ceramic portion is configured to correspond to the radio wave induction type. It is also possible to correspond to formulas.
尚、上記の如く透光性スピネルセラミックスは透光性と
共に電波透過性を有するので、透光性スピネルセラミッ
クスのみで構成したドームは電波誘導式、赤外誘導式及
び複合誘導式のいずれにも対応出来る。しかし、複合誘
導式では、ドーム内側に赤外線センサーと電波アンテナ
の両方を収容する必要があり、ドームサイズが必然的に
大きくなるので、ドーム全体を透光性スピネルセラミッ
クスのみで作製することは製造技術上［ｔであり、製造
出来たとしても極めてコスト高となる欠点がある。As mentioned above, translucent spinel ceramics has both translucency and radio wave transparency, so domes made only of translucent spinel ceramics are compatible with radio wave induction, infrared induction, and composite induction. I can do it. However, with the composite induction type, it is necessary to house both the infrared sensor and the radio antenna inside the dome, which inevitably increases the dome size. Above [T], even if it can be manufactured, it has the drawback of being extremely expensive.
然るに本発明では、ドームのほぼ半分を非加圧焼結で安
価に製造できる非透光性ムライ）ｌセラミックスで構成
するので、簡単に低コストで製造できる利点がある。However, in the present invention, since approximately half of the dome is made of non-transparent ceramics that can be manufactured at low cost by non-pressure sintering, there is an advantage that the dome can be easily manufactured at low cost.
本発明のドームを構成する透光性スピネルセラミックス
と非透光性ムライト質セラミックスは、従来のドーム材
料である低誘電率ガラス及びＭｇＦやＺｎＳ等と比較し
て格段に高い強度、硬度、及び耐熱性を具えている。例
えば、曲げ強度は約１７に９／闘２程度で硬度は１１０
０〜１３００程度以上と高く、砂粒や氷粒の衝突に対し
ても傷つきにくく、従って耐久性に優れている。この耐
久性は円錐や角錐の形状に形成することにより更に助長
される。又、融点が１８００〜２０００ Ｃ”以上と耐
熱性にも優れているため、高速での空力加熱による昇温
にも充分耐えることが出来る。The translucent spinel ceramics and non-translucent mullite ceramics that make up the dome of the present invention have significantly higher strength, hardness, and heat resistance than conventional dome materials such as low dielectric constant glass, MgF, and ZnS. It has sex. For example, the bending strength is about 17 to 9/2 and the hardness is about 110.
It has a high rating of about 0 to 1,300 or more, and is not easily damaged by collisions with sand or ice particles, and therefore has excellent durability. This durability is further promoted by forming it in the shape of a cone or pyramid. Furthermore, it has excellent heat resistance, with a melting point of 1800 to 2000 C'' or higher, and can sufficiently withstand temperature rises caused by aerodynamic heating at high speeds.
更に、透光性スピネルセラミックスと非透光性ムライト
質セラミックスは、熱膨張係数が４．２〜６、７ Ｘ
１０−６／Ｃ”程度でアルミナより小さく且つ互いに比
較的近い値をもち、又熱伝導率がガラスより大きいので
耐熱衝撃性に優れ、互いに接着又は接合しても空力加熱
時の熱歪が少なく剥離等の危険が少ない。又、誘電率が
共に７〜８．２と低く、誘電損失も１０１以下であるた
め、電波透過性に優れ且つ全体として電波特性に歪のな
いドームが得られる。Furthermore, the translucent spinel ceramics and non-translucent mullite ceramics have thermal expansion coefficients of 4.2 to 6.7
10-6/C", which is smaller than alumina and relatively close to each other, and has higher thermal conductivity than glass, so it has excellent thermal shock resistance, and even when bonded or bonded together, there is little thermal distortion during aerodynamic heating. There is little risk of peeling, etc. Furthermore, since both the dielectric constants are low, ranging from 7 to 8.2, and the dielectric loss is 101 or less, a dome with excellent radio wave transmittance and no distortion in radio wave characteristics as a whole can be obtained.
純度９９．７％、平均粒径１．０μｍのムライト粉末に
、ＴｉＯ粉末を０．１％添加して混合し、石膏型を用い
たスリップキャスティング法により直径２００闘及び厚
さ１０間の半球状に成形し、乾燥後大気中で１６５０Ｃ
”で焼結した。得られたムライト質セラミックスは非透
光性の白色で、気孔率３％以下であり、導波管を用いた
定在波法により測定したところ、誘電率は７．０、誘電
損失は３．０Ｘ１０”−’であった。又、波長３〜５μ
ｍでの赤外光の透過率は０％であった。Mullite powder with a purity of 99.7% and an average particle size of 1.0 μm was mixed with 0.1% TiO powder, and a hemispherical shape with a diameter of 20 mm and a thickness of 10 mm was formed by slip casting using a plaster mold. After drying, heat at 1650C in the atmosphere.
The resulting mullite ceramic is non-transparent white, has a porosity of 3% or less, and has a dielectric constant of 7.0 when measured by the standing wave method using a waveguide. , the dielectric loss was 3.0×10''-'. Also, wavelength 3~5μ
The transmittance of infrared light at m was 0%.
一方、純度９９．９％、平均粒径】μｍの高純度スピネ
ル粉末をカーボン質の型を用いた真空ポットプレス法に
より、温度１４５０Ｃ°及び圧力２００ｋＬｙｃｍ２で
直径２００朋及び厚さ２０闘の半球状に焼結し、更にＡ
ｒガスを用いて１６００Ｃ’及び２０００ ｋｇ／ｃｍ
”の圧力で２時間のＨＩＰ処理を行なった。得られた
スピネルセラミックスは無色透明で、気孔１０．１％以
下であり、誘電率は８．２、誘電損失は１．１Ｘ１０−
“であった。又、厚さ５．５朋に鏡面研磨した試験片の
波長３〜５μｍの赤外光での透過率は平均８１％であっ
た。更に、この試験片の表面に反射防止コーティングを
施したところ、侵大透過率が９１％に向上した。On the other hand, high-purity spinel powder with a purity of 99.9% and an average particle size of μm was processed into a hemispherical shape with a diameter of 200mm and a thickness of 20mm at a temperature of 1450°C and a pressure of 200kLycm2 using a carbon mold. sintered to A
1600C' and 2000 kg/cm using r gas
HIP treatment was carried out for 2 hours at a pressure of
In addition, the average transmittance of the test piece mirror-polished to a thickness of 5.5 μm for infrared light with a wavelength of 3 to 5 μm was 81%. When the coating was applied, the invasive transmittance increased to 91%.
上記の如く製造した透光性スピネルセラミックスと非透
光性ムライト質セラミックスをカーブジェネレータによ
り研削加工し、厚さ約５ ＋＋＋ｓの半球状ドームを作
製した。更に透光性スピネルセラミックスは両面を厚さ
約５．５門まで鏡面研磨加工した。その後、これら半球
状の試料を夫々半分に切断し、透光性スピネルセラミッ
クスには反射防止コーティングを施した後、両者をエポ
キシ系接着剤で接着して半球状のドームを二個製造した
。The translucent spinel ceramics and non-translucent mullite ceramics produced as described above were ground using a curve generator to produce a hemispherical dome with a thickness of approximately 5 +++ seconds. Furthermore, both sides of the translucent spinel ceramic were mirror-polished to a thickness of about 5.5 mm. Thereafter, each of these hemispherical samples was cut in half, and the translucent spinel ceramics were coated with an antireflection coating, and then both were adhered with an epoxy adhesive to produce two hemispherical domes.
コ（７１）トＡの透光性スピネルセラミックスの部分は
、赤外光透過率が波長３〜５μｍの赤外光で平均約８１
％であり、その内側に設置した赤外線センサーは正常に
作動することが確認された。又、非透光性ムライト質セ
ラミックスの部分における電波の透過損失は２．２ｄＢ
以下であり、その内側に設置した電波アンテナも正常に
作動した。これらの結果により、このドームは複合誘導
式に充分適用出来ることが判った。(71) The translucent spinel ceramic part of A has an average infrared transmittance of about 81 for infrared light with a wavelength of 3 to 5 μm.
%, and it was confirmed that the infrared sensor installed inside it was operating normally. In addition, the transmission loss of radio waves in the non-transparent mullite ceramic part is 2.2 dB.
The radio antenna installed inside the antenna also worked properly. These results show that this dome is fully applicable to complex induction systems.
又、このドームは、−４０Ｃ’から＋７０Ｃ°での熱サ
イクルによる耐熱試験によっても何等異常は認められな
かった。Further, no abnormality was found in this dome when it was subjected to a heat resistance test by thermal cycling from -40C' to +70C.
本発明によれば、硬度や強度、及び耐熱性に優れ、ミサ
イル等の高速条件下においても充分な耐久性を有するう
え、電波誘導式、赤外光誘導式又は複合誘導式のいずれ
にも対応出来る高速飛翔体用ドームを提供することがで
きる。According to the present invention, it has excellent hardness, strength, and heat resistance, has sufficient durability even under high-speed conditions such as missiles, and is compatible with radio wave guidance, infrared light guidance, or composite guidance. It is possible to provide a dome for high-speed flying objects.
第１図は本発明による高速飛翔体用ドームの一具体例を
示す概略の断面図、第２図はその平面図である。
１・・透光性スピネルセラミックス
２・・非透光性ムライト質セラミックス３・・赤外線セ
ンサー
４・・電波アンテナFIG. 1 is a schematic sectional view showing a specific example of a dome for high-speed flying objects according to the present invention, and FIG. 2 is a plan view thereof. 1. Translucent spinel ceramics 2. Non-transparent mullite ceramics 3. Infrared sensor 4. Radio antenna
Claims (1)
透光性スピネルセラミックスの部分と、非透光性ムライ
ト質セラミックスの部分とからなる高速飛翔体用ドーム
。(1) A dome attached to the tip of a high-speed flying object,
A dome for high-speed flying objects consisting of a translucent spinel ceramic part and a non-translucent mullite ceramic part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3459990A JPH03241300A (en) | 1990-02-15 | 1990-02-15 | Dome for high-speed projectile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3459990A JPH03241300A (en) | 1990-02-15 | 1990-02-15 | Dome for high-speed projectile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03241300A true JPH03241300A (en) | 1991-10-28 |
Family
ID=12418814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3459990A Pending JPH03241300A (en) | 1990-02-15 | 1990-02-15 | Dome for high-speed projectile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03241300A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6091375A (en) * | 1996-06-25 | 2000-07-18 | Sumitomo Electric Industries, Ltd. | Radome |
| US9624136B2 (en) | 2014-07-01 | 2017-04-18 | Corning Incorporated | Transparent spinel article and tape cast methods for making |
-
1990
- 1990-02-15 JP JP3459990A patent/JPH03241300A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6091375A (en) * | 1996-06-25 | 2000-07-18 | Sumitomo Electric Industries, Ltd. | Radome |
| US9624136B2 (en) | 2014-07-01 | 2017-04-18 | Corning Incorporated | Transparent spinel article and tape cast methods for making |
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