JPH0822760B2 - Fe-Ni-Co alloy sealing glass - Google Patents
Fe-Ni-Co alloy sealing glassInfo
- Publication number
- JPH0822760B2 JPH0822760B2 JP62051809A JP5180987A JPH0822760B2 JP H0822760 B2 JPH0822760 B2 JP H0822760B2 JP 62051809 A JP62051809 A JP 62051809A JP 5180987 A JP5180987 A JP 5180987A JP H0822760 B2 JPH0822760 B2 JP H0822760B2
- Authority
- JP
- Japan
- Prior art keywords
- glass
- thermal expansion
- alloy
- chemical durability
- devitrification
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/24—Fusion seal compositions being frit compositions having non-frit additions, i.e. for use as seals between dissimilar materials, e.g. glass and metal; Glass solders
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、一般にコバール（kovar）合金と呼ばれるF
e−Ni−Co合金封着用ガラスに関し、特に低バックグラ
ウンド放射線計測分野で使用される光電子増倍管におい
て、Fe−Ni−Co合金からなる外被筒体に直接封着するガ
ラス製の全面窓材料として好適なFe−Ni−Co合金封着用
ガラスに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to F, which is generally called a kovar alloy.
Regarding e-Ni-Co alloy sealing glass, especially in photomultiplier tubes used in the field of low background radiation measurement, a glass full-scale window that is directly sealed to the outer cylinder made of Fe-Ni-Co alloy The present invention relates to an Fe-Ni-Co alloy sealing glass suitable as a material.
［従来技術とその問題点］ 低レベルの放射線検出器や微弱光検出器として今日で
は広く光電子増倍管が使用されている。光電子増倍管と
しては近紫外から近赤外域までの広範囲にわたって高感
度で時間応答性に優れた光検出器であることが要請さ
れ、そのためこれの窓材料として用いられるガラスには
その分光感度を満足させるために光透過率の低下をきた
すFe、Ti等の光線吸収成分が少ないこと、さらに低バッ
クグラウンド放射線を計測する際に雑音の最大原因をな
す放射性物質である40Kが存在しないことが要求され
る。[Prior Art and Its Problems] Today, photomultiplier tubes are widely used as low-level radiation detectors and weak photodetectors. The photomultiplier tube is required to be a photodetector with high sensitivity and excellent time response over a wide range from near-ultraviolet to near-infrared region.Therefore, the glass used as a window material for this has its spectral sensitivity. In order to satisfy the requirement, there are few light absorption components such as Fe and Ti that cause a decrease in light transmittance, and 40 K, which is the radioactive substance that causes the largest noise when measuring low background radiation, does not exist. Required.
通常40Kはガラス中に含まれるK2O成分により発生し、
それのK2Oに占める存在比は0.0119％であり、また放射
線の半減期は1.26×10y9である。この40Kから放出され
るβ−粒子（1.31MeV）、β＋粒子（0.48MeV）、γ線
（1.46MeV）は無視できない程度の雑音となってバック
グラウンドを増加させる。Normally 40 K is generated by the K 2 O component contained in the glass,
Its abundance ratio in K 2 O is 0.0119%, and the half-life of radiation is 1.26 × 10 y 9 . The β − particles (1.31 MeV), β + particles (0.48 MeV), and γ rays (1.46 MeV) emitted from this 40 K become noise that cannot be ignored and increase the background.
そのために極めてK2Oが少ない高純度の石英ガラスが
光電子増倍管の窓材料として使われているが、これはガ
ラス材料として非常に高価である。また石英ガラスは30
〜380℃における熱膨張係数が５〜６×10-7/℃であり、
Fe−Ni−Co合金の熱膨張係数44〜51×10-7/℃とは大き
く相違しているため直接封着すると引っ張り応力が生じ
てガラスが破損するという欠点がある。そこでこの引っ
張り応力を緩和するために熱膨張係数を徐々に変化させ
たガラスを数種類組み合わせる段継ぎ封着法が採用され
るが、この方法は光電子増倍管の製造工程を複雑化さ
せ、製品の歩留まりを著しく抑制し、製造価格を大きく
引き上げるため好ましくない。Therefore, high-purity silica glass with extremely low K 2 O is used as a window material for photomultiplier tubes, which is very expensive as a glass material. Quartz glass is 30
Has a thermal expansion coefficient of 5 to 6 × 10 −7 / ° C. at ˜380 ° C.,
Since the thermal expansion coefficient of Fe-Ni-Co alloy is greatly different from 44 to 51 × 10 -7 / ° C, there is a disadvantage that direct sealing causes tensile stress and breaks the glass. Therefore, in order to relieve this tensile stress, a step-seal bonding method that combines several types of glass whose thermal expansion coefficient is gradually changed is adopted, but this method complicates the manufacturing process of the photomultiplier tube and It is not preferable because the yield is significantly suppressed and the manufacturing cost is greatly increased.
そこでFe−Ni−Co合金封着用ガラスとしてはFe−Ni−
Co合金の熱膨張係数に近い熱膨張係数を有するコーニン
グ社の7052型及び7056型ガラスが専ら使用されている。
しかしながら、これらのガラスは、ともにK2Oを多量に
含有するものであり、先記した事情から光電子増倍管窓
材料として用いるには不適当である。またこれらのガラ
スは高温溶融時に溶融ガラス中からB2O3、Na2B4O7、K2B
4O7等の揮発成分が蒸発逸散し、作業槽のガラス表面にS
iO2富んだスカムと呼ばれる変質層が生成し、従ってス
カムに起因するガラス不均質成分の混入によって泡やブ
ツ、脈理の無いガラス品位を得る事が極めて困難であ
る。さらにガラスの化学的耐久性も悪く製品保存中に大
気中の水分とガラスからのアルカリ成分の反応によって
アルカリ吹きと呼ばれる現象を招き、この表面変質の影
響により熱加工時にガラス表面にシワが生じたり透過率
が低下するという欠点を有している。Therefore, Fe-Ni-Co alloy sealing glass is Fe-Ni-
Corning 7052 and 7056 glasses with a coefficient of thermal expansion close to that of the Co alloy are used exclusively.
However, both of these glasses contain a large amount of K 2 O, and are unsuitable for use as a photomultiplier tube window material from the above-mentioned circumstances. In addition, these glasses were used to melt B 2 O 3 , Na 2 B 4 O 7 , and K 2 B from the molten glass during high temperature melting.
Volatile components such as 4 O 7 evaporate and dissipate, causing S on the glass surface of the work tank.
An altered layer called scum rich in iO 2 is formed, and therefore it is extremely difficult to obtain a glass quality free from bubbles, lumps and striae due to the inclusion of a glass inhomogeneous component caused by scum. Furthermore, the chemical durability of the glass is poor, and during storage of the product, a phenomenon called alkali blowing is caused by the reaction of moisture in the atmosphere with the alkali component from the glass, and the surface alteration causes wrinkles on the glass surface during thermal processing. It has a drawback that the transmittance is lowered.
［発明の目的］ 本発明は上記問題点に鑑みなされたもので、光電子増
倍管に使用される窓材料用ガラスとして、低バックグラ
ウンド放射線計測に支障をきたす40Kが存在するK2Oを含
有せず、熱膨張係数が46〜53×10-7/℃、溶融粘度、す
なわち102.5ポイズに相当する温度が1400℃以下であ
り、溶融ガラス表面からの揮発成分の蒸発逸散が少な
く、アルカリ溶出量が0.1mg未満で化学的耐久性に優
れ、失透安定性が良いためガラスの失透による欠陥の発
生がなく、さらに近紫外から近赤外域にかけての光透過
率が高く、しかも電気特性が安定しているFe−Ni−Co合
金封着用ガラスを提供することを目的とするものであ
る。[Object of the Invention] The present invention has been made in view of the above problems, and as a glass for a window material used for a photomultiplier tube, K 2 O in which 40 K exists, which interferes with low background radiation measurement, is used. Does not contain, the coefficient of thermal expansion is 46 ~ 53 × 10 -7 / ℃, melt viscosity, i.e. the temperature corresponding to 10 2.5 poise is 1400 ℃ or less, the evaporation loss of volatile components from the molten glass surface is small, With an alkali elution amount of less than 0.1 mg, it has excellent chemical durability and good devitrification stability, so there are no defects due to devitrification of the glass. An object of the present invention is to provide an Fe-Ni-Co alloy sealing glass having stable properties.
［発明の構成］ 本発明のFe−Ni−Co合金封着用ガラスは、重量百分率
でSiO260.0〜67.0％、Al2O33.0〜8.0％、B2O38.0〜15.0
％、BaO1.5〜6.0％、ZnO1.5〜6.0％、SrO0〜3.0％、CaO
0〜1.5％、MgO0〜1.5％、La2O30.25〜5.0％、ZrO20〜2.
0％、Na2O＋Li2O4.0〜7.0％を含有し、本質的にK2Oを含
有せず、30〜380℃における熱膨張係数が46〜53×10-7/
℃であることを特徴とする。As an Fe-Ni-Co alloy sealing glass of the present invention Configuration of the Invention are, SiO 2 from 60.0 to 67.0% by weight percentage, Al 2 O 3 3.0~8.0%, B 2 O 3 8.0~15.0
%, BaO1.5-6.0%, ZnO1.5-6.0%, SrO0-3.0%, CaO
0~1.5%, MgO0~1.5%, La 2 O 3 0.25~5.0%, ZrO 2 0~2.
0%, containing 2 O4.0~7.0% Na 2 O + Li , essentially did not contain K 2 O, the thermal expansion coefficient at 30 to 380 ° C. is 46~53 × 10 -7 /
It is characterized in that it is ℃.
以下に本発明のFe−Ni−Co合金封着用ガラスの各成分
の作用とその含有範囲を上記のように限定した理由につ
いて説明する。The action of each component of the glass for Fe-Ni-Co alloy sealing of the present invention and the reason for limiting the content range thereof as described above will be described below.
SiO2はガラス構造の骨格をなす基礎ガラス形成成分で
あり、その含有量は60.0〜67.0％である。60.0％より少
ない場合は熱膨張係数が高くなるとともに化学的耐久性
が悪くなり、67.0％より多い場合は粘度が高くなり溶融
が困難となる。SiO 2 is a basic glass forming component that forms the skeleton of the glass structure, and its content is 60.0 to 67.0%. If it is less than 60.0%, the coefficient of thermal expansion will be high and the chemical durability will be poor, and if it is more than 67.0%, the viscosity will be high and melting will be difficult.
Al2O3は化学的耐久性を向上させガラスの失透を抑制
する成分であり、その含有量は3.0〜8.0％である。3.0
％より少ない場合はガラスが不安定となり分相して乳白
化を生じ易くまた化学的耐久性が悪くなり、8.0％より
多い場合は粘度が高くなり溶融が困難となる。Al 2 O 3 is a component that improves chemical durability and suppresses devitrification of glass, and its content is 3.0 to 8.0%. 3.0
When it is less than 8.0%, the glass becomes unstable and phase separation is likely to occur, and the chemical durability is deteriorated. When it is more than 8.0%, the viscosity becomes high and melting becomes difficult.
B2O3はガラス化を促進するための融剤として作用し、
粘度を下げて溶融を容易にする成分であり、その含有量
は8.0〜15.0％である。8.0％より少ない場合は上記の効
果が得られず、15.0％より多い場合はガラス表面からの
蒸発量が増大して脈理、失透等のガラス欠陥を生じ易
く、また化学的耐久性を悪化させる。B 2 O 3 acts as a flux to promote vitrification,
It is a component that lowers the viscosity and facilitates melting, and its content is 8.0 to 15.0%. If it is less than 8.0%, the above effect cannot be obtained, and if it is more than 15.0%, the amount of evaporation from the glass surface increases and glass defects such as striae and devitrification tend to occur, and the chemical durability deteriorates. Let
BaOはガラスの分相を抑制し、化学的耐久性を向上さ
せる成分であり、その含有量は1.5〜6.0％である。1.5
％より少ない場合は上記効果が得られず、6.0％より多
い場合は粘度が高くなって溶融が困難となる。BaO is a component that suppresses the phase separation of glass and improves the chemical durability, and its content is 1.5 to 6.0%. 1.5
If it is less than 6.0%, the above effect cannot be obtained, and if it is more than 6.0%, the viscosity becomes high and melting becomes difficult.
ZnOはB2O3やアルカリ成分の蒸発を抑制する成分であ
り、その含有量は1.5〜6.0％である。1.5％より少ない
場合は上記の効果が得られず、6.0％より多い場合はガ
ラスの失透性が大きくなる。ZnO is a component that suppresses evaporation of B 2 O 3 and alkaline components, and its content is 1.5 to 6.0%. If it is less than 1.5%, the above effect cannot be obtained, and if it is more than 6.0%, the devitrification of the glass becomes large.
SrOはB2O3やアルカリ成分の蒸発を抑制する作用があ
り、3.0％より多い場合はガラスの失透性が大きくな
る。SrO has the effect of suppressing the evaporation of B 2 O 3 and alkali components, and when it exceeds 3.0%, the devitrification of the glass becomes large.
CaO及びMgOは化学的耐久性を向上させる成分であり、
各々1.5％より多い場合はガラスが乳白化するため好ま
しくない。CaO and MgO are components that improve chemical durability,
If the content of each exceeds 1.5%, the glass becomes opalescent, which is not preferable.
La2O3は良好な化学的耐久性及び電気特性を維持しな
がらガラスの粘度を下げ、揮発成分の蒸発量を抑制し、
さらに分相を抑制し、失透温度を下げるのに有効な成分
であり、その含有量は0.25〜5.0％である。0.25％より
少ない場合は上記効果が得られず、5.0％より多い場合
は失透性が大きくなると共に乳白化するため好ましくな
い。La 2 O 3 reduces the viscosity of the glass while maintaining good chemical durability and electrical properties, and suppresses the evaporation of volatile components,
Further, it is an effective component for suppressing the phase separation and lowering the devitrification temperature, and its content is 0.25 to 5.0%. If it is less than 0.25%, the above effect cannot be obtained, and if it is more than 5.0%, devitrification becomes large and milking occurs, which is not preferable.
ZrO2化学的耐久性を向上させ、分相を抑制し、失透温
度を下げるのに有効であり、その含有量は０〜2.0％で
ある。2.0％より多い場合は粘度が高くなり溶融が困難
となる。ZrO 2 is effective for improving the chemical durability, suppressing the phase separation, and lowering the devitrification temperature, and its content is 0 to 2.0%. If it exceeds 2.0%, the viscosity becomes high and it becomes difficult to melt.
Na2O及びLi2Oはガラスの溶融を容易にし、またガラス
の熱膨張係数を調節する成分であり、その含有量は合量
で4.0〜7.0％である。4.0％より少ない場合は粘度が高
くなって溶融が困難になると共に熱膨張係数が低くなり
すぎ、7.0％より多い場合は化学的耐久性が悪くなり、
また熱膨張係数が高くなりすぎると共に電気特性を悪化
させる。Na 2 O and Li 2 O are components that facilitate melting of the glass and adjust the coefficient of thermal expansion of the glass, and the total content thereof is 4.0 to 7.0%. When it is less than 4.0%, the viscosity becomes high and melting becomes difficult and the coefficient of thermal expansion becomes too low. When it is more than 7.0%, the chemical durability becomes poor,
In addition, the thermal expansion coefficient becomes too high and the electrical characteristics deteriorate.
また本発明においては上記成分に加えて、脱泡剤とし
てAs2O3、Sb2O3、Cl2を単独あるいは合量で1.0％まで含
有することができ、また紫外光線透過率を良くする目的
で還元剤としてAl、Sn、Ｃ等を添加することも可能であ
る。Further, in the present invention, in addition to the above components, As 2 O 3 , Sb 2 O 3 , Cl 2 as a defoaming agent may be contained alone or in a total amount of up to 1.0%, and the ultraviolet light transmittance is improved. For the purpose, it is possible to add Al, Sn, C or the like as a reducing agent.
［実施例］ 以下に本発明のガラスを実施例に基づいて説明する。[Example] The glass of the present invention will be described below based on Examples.
表の試料No.1〜15は本発明のガラスであり、試料No.1
6、17は従来のガラスである。Sample Nos. 1 to 15 in the table are the glasses of the present invention, and Sample No. 1
6 and 17 are conventional glass.
表の試料No.1〜17のガラス試料は次のように調製し
た。 The glass samples Nos. 1 to 17 in the table were prepared as follows.
各原料は表に示したガラスになるように均質に混合
し、白金製坩堝あるいは石英坩堝により1400℃で15〜16
時間溶融した後、溶融ガラスをカーボン型で板状に成形
して除歪みを施し、ガラス特性の測定に供した。Mix each raw material homogeneously so that it becomes the glass shown in the table, and use a platinum crucible or quartz crucible at 1400 ℃ for 15-16
After melting for a period of time, the molten glass was molded into a plate shape using a carbon mold, subjected to strain relief, and subjected to measurement of glass characteristics.
各々のガラス特性は表の特性欄に示した。 The glass properties of each are shown in the property column of the table.
表に記載した熱膨張係数は自動熱膨張計により測定し
た30〜380℃の平均値である。The coefficient of thermal expansion shown in the table is an average value of 30 to 380 ° C measured by an automatic thermal dilatometer.
またアルカリ溶出量はJIS R 3502に基づき100℃の水
中に溶出した合計アルカリ量を示しており、この値が小
さい程化学的耐久性に優れている。The amount of alkali elution indicates the total amount of alkali eluted in water at 100 ° C based on JIS R 3502. The smaller this value, the better the chemical durability.
蒸発重量減少率はガラス試料片を８〜12メッシュに粉
砕分級して得たものを5g秤量して白金製坩堝に入れ、こ
れを試料ガラスの102.5ポイズ温度に保持した電気炉中
で24時間加熱してその重量減少量を測定し、当初のガラ
ス重量で除した値に100を乗じた値を示したものであ
り、この値が小さい程揮発成分の蒸発が少なく表面変質
によるガラス欠陥が生成し難い。The evaporation weight reduction rate was obtained by crushing and classifying glass sample pieces into 8 to 12 mesh and weighing 5g into a platinum crucible, which was placed in an electric furnace kept at 10 2.5 poise temperature of the sample glass for 24 hours. The amount of weight loss was measured by heating, and the value obtained by dividing the value by the initial glass weight was multiplied by 100.The smaller this value is, the less evaporation of volatile components occurs, and glass defects due to surface alteration are generated. It's hard to do.
透過率は、各試料を20×20×1mmに加工し表面を光学
研磨して分光光度計により測定した300nmにおける値を
示した。The transmittance was a value at 300 nm measured by a spectrophotometer after processing each sample into 20 × 20 × 1 mm, optically polishing the surface.
電気抵抗は150℃におけるガラスの体積固有抵抗値をL
ogρ（Ω−cm）で示した。The electrical resistance is the volume specific resistance value of glass at 150 ℃ L
It is shown by og ρ (Ω-cm).
表からわかるように本発明のガラスは、熱膨張係数が
所期の目的とした46〜53×10-7/℃の範囲にあり、Fe−N
i−Co合金のそれに実質的に合致しており、またアルカ
リ溶出量が0.03〜0.05mg、蒸発重量減少率が6.6〜8.5％
と低い値を示し、さらに300nmにおける透過率が80.0〜9
0.5％、電気抵抗が9.6〜10.0と高く全ての特性において
優れていることがわかる。また従来のガラスと比較する
とアルカリ溶出量及び蒸発重量減少率において良好な値
を示している。As can be seen from the table, the glass of the present invention has a coefficient of thermal expansion in the range of 46 to 53 × 10 −7 / ° C. which is the intended purpose, and Fe—N
Substantially matches that of the i-Co alloy, the alkali elution amount is 0.03 to 0.05 mg, and the evaporation weight reduction rate is 6.6 to 8.5%.
And the transmittance at 300 nm is 80.0-9.
It can be seen that it is excellent in all properties, with a high 0.5% and an electric resistance of 9.6 to 10.0. Moreover, compared with the conventional glass, the alkali elution amount and the evaporative weight reduction rate show favorable values.
［発明の効果］ 本発明のFe−Ni−Co合金封着用ガラスは、K2Oを含有
しないため低バックグラウンド放射線計測に支障をきた
さないこと、溶融時に揮発成分の蒸発がないため高品位
のガラスが得られること、失透安定性が良いため失透に
よるガラス欠陥の発生がないこと、熱膨張係数がFe−Ni
−Co合金のそれに実質的に合致しているため封着時の破
損を防止できること、アルカリ溶出量が0.1mg未満であ
るため優れた化学的耐久性を具備すること、近紫外から
近赤外域にかけての光透過率が高いこと、電気特性が安
定していること等の特性を有しているため光電子増倍管
をはじめとして各種撮像管の窓材料として好適である。
さらに近紫外から近赤外域にかけての光透過率が高いた
め紫外線透過用の窓材料としても利用できる。As an Fe-Ni-Co alloy sealing glass of the present invention [Effect of the invention] is not disturb the low background radiation measurement because not containing K 2 O, of high quality because there is no evaporation of volatile components during melting Glass can be obtained, devitrification stability is good, no glass defects occur due to devitrification, and the thermal expansion coefficient is Fe-Ni.
-Because it substantially matches that of the Co alloy, it can prevent damage at the time of sealing, it has excellent chemical durability because the alkali elution amount is less than 0.1 mg, and it has a near-ultraviolet to near-infrared region. Since it has characteristics such as high light transmittance and stable electric characteristics, it is suitable as a window material for various image pickup tubes including photomultiplier tubes.
Further, since it has a high light transmittance in the near-ultraviolet to near-infrared region, it can be used as a window material for transmitting ultraviolet rays.
Claims (1)
〜8.0％、B2O38.0〜15.0％、BaO1.5〜6.0％、ZnO1.5〜
6.0％、SrO0〜3.0％、CaO0〜1.5％、MgO0〜1.5％、La2O
30.25〜5.0％、ZrO20〜2.0％、Na2O＋Li2O4.0〜7.0％を
含有し、本質的にK2Oを含有せず、30〜380℃における熱
膨張係数が46〜53×10-7/℃であることを特徴とするFe
−Ni−Co合金封着用ガラス。1. A weight percentage of SiO 2 60.0 to 67.0% and Al 2 O 3 3.0.
~8.0%, B 2 O 3 8.0~15.0 %, BaO1.5~6.0%, ZnO1.5~
6.0%, SrO0~3.0%, CaO0~1.5% , MgO0~1.5%, La 2 O
3 0.25~5.0%, ZrO 2 0~2.0% , containing 2 O4.0~7.0% Na 2 O + Li , essentially did not contain K 2 O, the thermal expansion coefficient at 30 to 380 ° C. is 46 to 53 Fe characterized by × 10 -7 / ° C
-Ni-Co alloy sealing glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62051809A JPH0822760B2 (en) | 1987-03-05 | 1987-03-05 | Fe-Ni-Co alloy sealing glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62051809A JPH0822760B2 (en) | 1987-03-05 | 1987-03-05 | Fe-Ni-Co alloy sealing glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63218525A JPS63218525A (en) | 1988-09-12 |
| JPH0822760B2 true JPH0822760B2 (en) | 1996-03-06 |
Family
ID=12897243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62051809A Expired - Lifetime JPH0822760B2 (en) | 1987-03-05 | 1987-03-05 | Fe-Ni-Co alloy sealing glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0822760B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108164145A (en) * | 2016-12-07 | 2018-06-15 | 辽宁省轻工科学研究院 | A kind of easy crystallization can cut down sealing glass material and its preparation method and application |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1426345A1 (en) * | 2002-12-03 | 2004-06-09 | Corning Incorporated | Borosilicate glass compositions and uses therof |
| US7897530B2 (en) * | 2008-01-14 | 2011-03-01 | Atomic Energy Council-Institute Of Nuclear Energy Research | Glass-ceramic sealant for planar solid oxide fuel cells |
| CN108341594A (en) * | 2018-04-27 | 2018-07-31 | 海南中航特玻科技有限公司 | A kind of effective high borosilicate glass material of photomultiplier transit |
| CN112939455B (en) * | 2021-03-23 | 2022-04-15 | 成都光明光电股份有限公司 | Optical glass, optical element and optical instrument |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6215493A (en) * | 1985-07-15 | 1987-01-23 | 株式会社東芝 | Spent fuel transport and storage vessel |
-
1987
- 1987-03-05 JP JP62051809A patent/JPH0822760B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108164145A (en) * | 2016-12-07 | 2018-06-15 | 辽宁省轻工科学研究院 | A kind of easy crystallization can cut down sealing glass material and its preparation method and application |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63218525A (en) | 1988-09-12 |
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