JPH0558671A - Ir ray-absorbing glass - Google Patents
Ir ray-absorbing glassInfo
- Publication number
- JPH0558671A JPH0558671A JP25306991A JP25306991A JPH0558671A JP H0558671 A JPH0558671 A JP H0558671A JP 25306991 A JP25306991 A JP 25306991A JP 25306991 A JP25306991 A JP 25306991A JP H0558671 A JPH0558671 A JP H0558671A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- linear expansion
- weather resistance
- expansion coefficient
- ray
- 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.)
- Granted
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
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、赤外線吸収ガラスに関
し、より具体的には、Ｃｏ−Ｆｅ系合金からなる磁性線
材を用いた大電流負荷対応型リードスイッチを封入する
のに好適な赤外線吸収ガラスに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to infrared absorbing glass, and more specifically to infrared absorbing glass suitable for encapsulating a large current load type reed switch using a magnetic wire made of a Co--Fe alloy. It is about glass.
【０００２】[0002]
【従来の技術】リードスイッチは、対向する磁性線材か
らなる接点と、これを封入するガラス管から構成され、
ガラス管の外側から磁界を与えることによって、接点の
開閉動作が行われるものである。磁性線材のガラス管へ
の封入は、不活性ガス、還元ガスあるいは真空下におい
て、ガラス管内部に磁性線材を挿入した状態でガラス管
の両端を加熱し、密封することによって行われる。その
ためこの加熱作業には、上記の雰囲気下において使用可
能な熱源、例えば金メッキ反射板で集光された石英−ヨ
ウ素ランプを用いた赤外線放射型熱源が利用され、この
ような事情からリードスイッチ用ガラスには、赤外線吸
収能力を備えていることが要求される。2. Description of the Related Art A reed switch is composed of a contact made of magnetic wires facing each other and a glass tube enclosing the contact.
The contact is opened and closed by applying a magnetic field from the outside of the glass tube. The magnetic wire is sealed in the glass tube by heating both ends of the glass tube under an inert gas, a reducing gas, or in a vacuum with the magnetic wire inserted inside the glass tube and sealing the glass tube. Therefore, for this heating work, a heat source usable under the above atmosphere, for example, an infrared radiation type heat source using a quartz-iodine lamp focused by a gold-plated reflector is used. Are required to have infrared absorption capability.
【０００３】ところでリードスイッチが開閉できる負荷
容量は、主にそこに用いられる磁性線材の組成の制限を
受け、従来より一般に用いられているＦｅ−Ｎｉ系合金
からなる磁性線材で開閉できる負荷の容量は７０Ｗ（１
００Ｖ−０．７Ａ）程度が限度である。By the way, the load capacity that can be opened and closed by the reed switch is mainly limited by the composition of the magnetic wire used therein, and the load capacity that can be opened and closed by a magnetic wire made of a Fe--Ni alloy that has been generally used in the past. Is 70 W (1
00V-0.7A) is the limit.
【０００４】しかしながら近年種々の技術の進歩に伴
い、あるいは、自動化を進める上で、リードスイッチで
１００Ｗ（１００Ｖ−１Ａ）以上の家庭電化製品や、ロ
ボットのモーター等を直接開閉する要求が増えつつあ
る。これらの大電流負荷対応型リードスイッチに使用さ
れる磁性線材には、電気抵抗値が小さいこと、キュリー
点が高いこと、熱伝導率が大きいことが要求され、その
ため従来のＦｅ−Ｎｉ系合金からなる磁性線材に代わっ
て、上記各特性を満足する磁性線材、例えばＣｏ−Ｆｅ
系合金からなる磁性線材を使用することが試みられてい
る。However, along with the progress of various technologies in recent years or the progress of automation, there is an increasing demand for directly opening / closing a home electric appliance of 100 W (100 V-1 A) or more with a reed switch or a motor of a robot. .. The magnetic wire used in these large current load type reed switches is required to have a low electric resistance value, a high Curie point, and a high thermal conductivity. In place of the magnetic wire, the magnetic wire satisfying the above-mentioned characteristics, for example, Co--Fe.
Attempts have been made to use a magnetic wire made of a system alloy.
【０００５】[0005]
【発明が解決しようする課題】ところがＣｏ−Ｆｅ系合
金は、３０〜３８０℃の温度範囲における線膨張係数が
１２０〜１４５×１０-7／℃程度であり、そのためこの
ような合金からなる磁性線材を従来から使用されている
線膨張係数が９０〜１００×１０-7／℃程度のリードス
イッチ用ガラスで封入すると、両者の線膨張係数の差が
大きいためにガラスが割れたり、気密性が損なわれやす
い。However, the Co--Fe alloy has a linear expansion coefficient of about 120 to 145 × 10 -7 / ° C. in the temperature range of 30 to 380 ° C. Therefore, a magnetic wire made of such alloy is used. If sealed with reed switch glass having a linear expansion coefficient of 90 to 100 × 10 −7 / ° C., which has been conventionally used, the glass will break due to the large difference in linear expansion coefficient between the two, and the airtightness will be impaired. It is easy to get caught.
【０００６】そこで従来より線膨張係数を大きくするた
めにガラス中のアルカリ金属酸化物、すなわちＲ2 Ｏ
（ただしＲは、Ｌｉ、Ｎａ、Ｋを示す）の含有量を増や
したガラスが提案され、例えば特公昭５３−２２８３０
号公報には、ＢａＯ、Ａｌ2 Ｏ3 、ＳｉＯ2 、Ｋ2 Ｏ、
Ｎａ2 Ｏ、ＦｅＯを主成分とし、Ｎａ2 ＯとＫ2 Ｏの合
量が１８〜２３％であり、線膨張係数が１１８〜１１９
×１０-7／℃のアルカリバリウムシリケートガラスが開
示されている。Therefore, in order to increase the linear expansion coefficient more than ever before, an alkali metal oxide in glass, that is, R 2 O.
Glass in which the content of R (wherein R represents Li, Na, K) is increased is proposed, for example, Japanese Patent Publication No. 53-22830.
In the publication, BaO, Al 2 O 3 , SiO 2 , K 2 O,
Main components are Na 2 O and FeO, the total amount of Na 2 O and K 2 O is 18 to 23%, and the linear expansion coefficient is 118 to 119.
Alkali barium silicate glass of × 10 -7 / ° C is disclosed.
【０００７】しかしながらこのガラスのように線膨張係
数を大きくするため、単純にＲ2 Ｏの含有量を増やす
と、ガラスのアルカリ溶出量が大きくなり、耐候性の著
しい劣化をまねく。このことは、リードスイッチの電気
特性、経時変化等、リードスイッチ機能および信頼性の
大幅な低下につながるために好ましくない。However, if the content of R 2 O is simply increased in order to increase the linear expansion coefficient as in this glass, the alkali elution amount of the glass becomes large and the weather resistance is significantly deteriorated. This is not preferable because it leads to a significant reduction in the reed switch function and reliability, such as the electrical characteristics and aging of the reed switch.
【０００８】さらに特公昭４２−２５９１９号公報に
は、Ｒ2 Ｏを７〜１５％含有するアルカリシリケートガ
ラスに対して、耐候性を改善する目的で、ＣａＯ、Ｂａ
Ｏ、Ｂ2 Ｏ3 、Ａｌ2 Ｏ3 、ＭｇＯ、ＴｉＯ2 及びＺｒ
Ｏ2 を約５％まで含有する旨が開示されているが、この
ガラスは線膨張係数が低く、またこのガラスの線膨張係
数を１１０×１０-7／℃以上にする目的で、Ｒ2 Ｏの含
有量を増やした場合には、十分な耐候性が得られなくな
ると考えられる。Further, Japanese Patent Publication No. 42-25919 discloses CaO and Ba for the purpose of improving weather resistance with respect to an alkali silicate glass containing 7 to 15% of R 2 O.
O, B 2 O 3 , Al 2 O 3 , MgO, TiO 2 and Zr
Although it is disclosed that O 2 is contained up to about 5%, this glass has a low linear expansion coefficient, and R 2 O is used for the purpose of increasing the linear expansion coefficient of this glass to 110 × 10 −7 / ° C. or more. It is considered that when the content of is increased, sufficient weather resistance cannot be obtained.
【０００９】本発明は、上記事情に鑑みなされたもので
あり、３０〜３８０℃の温度範囲において１１０〜１３
５×１０-7／℃の線膨張係数を有し、しかも優れた耐候
性と赤外線吸収能力を有するため、大電流負荷対応型リ
ードスイッチを良好に封入することが可能な赤外線吸収
ガラスを提供することを目的とするものである。The present invention has been made in view of the above circumstances, and 110 to 13 in a temperature range of 30 to 380 ° C.
Provided is an infrared absorbing glass which has a coefficient of linear expansion of 5 × 10 −7 / ° C., and has excellent weather resistance and infrared absorbing ability, so that a reed switch compatible with a large current load can be well encapsulated. The purpose is that.
【００１０】[0010]
【課題を解決するための手段】本発明者等は、アルカリ
シリケートガラスを基本として構成される赤外線吸収ガ
ラスにおいて、１１０×１０-7／℃以上の線膨張係数を
得るため、Ｒ2 Ｏを比較的多量に含有させながらも、Ｚ
ｎＯを適量含有させ、且つ、ＺｒＯ2 とＴｉＯ2 のうち
少なくともどちらか一方を適量含有させることによっ
て、優れた耐候性を付与することができることを見い出
し、本発明として提案するものである。In order to obtain a linear expansion coefficient of 110 × 10 −7 / ° C. or higher, the inventors of the present invention compare R 2 O in infrared absorbing glass composed mainly of alkali silicate glass. While containing a large amount of Z
It has been found that excellent weather resistance can be imparted by containing an appropriate amount of nO and at least one of ZrO 2 and TiO 2 , and proposes the present invention.
【００１１】すなわち本発明の赤外線吸収ガラスは、重
量百分率で、ＳｉＯ2 ４０．０〜６６．０％、Ａｌ2
Ｏ3 ０．５〜１５．０％、ＺｒＯ2 ＋ＴｉＯ2 ０．
１〜１５．０％、ＺｎＯ １．０〜２１．０％、Ｌｉ2
Ｏ ０〜１０．０％、Ｎａ2Ｏ＋Ｋ2 Ｏ ７．０〜３
１．０％、Ｆｅ3 Ｏ4 ０．１〜１０．０％の組成を有
し、３０〜３８０℃の温度範囲における線膨張係数が１
１０〜１３５×１０-7／℃であり、優れた耐候性を有す
ることを特徴とする。That is, the infrared ray absorbing glass of the present invention has a weight percentage of SiO 2 of 40.0 to 66.0% and Al 2 of
O 3 0.5 to 15.0%, ZrO 2 + TiO 2 0.
1~15.0%, ZnO 1.0~21.0%, Li 2
O 0 to 10.0%, Na 2 O + K 2 O 7.0 to 3
It has a composition of 1.0% and Fe 3 O 4 0.1 to 10.0%, and has a linear expansion coefficient of 1 in the temperature range of 30 to 380 ° C.
It is 10 to 135 × 10 −7 / ° C., and is characterized by having excellent weather resistance.
【００１２】また本発明の赤外線吸収ガラスは、より好
ましくは、重量百分率で、ＳｉＯ2４５．０〜６５．０
％、Ａｌ2 Ｏ3 １．０〜１３．０％、ＺｒＯ2 ＋Ｔｉ
Ｏ2 ０．５〜１３．０％、ＺｎＯ ２．０〜２０．０
％、Ｌｉ2 Ｏ ０．３〜８．０％、Ｎａ2 Ｏ＋Ｋ2 Ｏ
８．０〜３０．０％、Ｆｅ3 Ｏ4 ０．５〜９．０％の
組成を有することを特徴とする。Further, the infrared absorbing glass of the present invention is more preferably SiO 2 45.0 to 65.0 in weight percentage.
%, Al 2 O 3 1.0 to 13.0%, ZrO 2 + Ti
O 2 0.5-13.0%, ZnO 2.0-20.0
%, Li 2 O 0.3 to 8.0%, Na 2 O + K 2 O
8.0 to 30.0%, and having a composition of Fe 3 O 4 0.5~9.0%.
【００１３】さらに本発明においては、Ｌｉ2 Ｏ、Ｎａ
2 Ｏ、Ｋ2 Ｏの合量が１５．０％以上であり、その１成
分の含有量が、単独でＲ2 Ｏの総量の８０％を越えない
ことを特徴とする。Further, in the present invention, Li 2 O, Na
The total content of 2 O and K 2 O is 15.0% or more, and the content of one component thereof does not exceed 80% of the total amount of R 2 O alone.
【００１４】[0014]
【作用】本発明の赤外線吸収ガラスを構成する各成分の
含有量を上記のように限定した理由は以下のとおりであ
る。The reason for limiting the content of each component constituting the infrared absorbing glass of the present invention as described above is as follows.
【００１５】ＳｉＯ2 は、ガラスの骨格を構成するため
に必要な主成分であるが、６６．０％より多いと、線膨
張係数が低くなりすぎると共に溶解性が悪化し、４０．
０％より少ないと、耐候性が悪化する。SiO 2 is a main component necessary for constituting the skeleton of glass, but if it exceeds 66.0%, the linear expansion coefficient becomes too low and the solubility deteriorates.
If it is less than 0%, the weather resistance deteriorates.
【００１６】Ａｌ2 Ｏ3 は、ガラスの耐候性を向上する
のに著しい効果があるが、１５．０％を多いとガラスの
溶解が困難になり、０．５％より少ないと、上記の効果
が得られない。Al 2 O 3 has a remarkable effect in improving the weather resistance of glass, but if it is more than 15.0%, it becomes difficult to dissolve the glass, and if it is less than 0.5%, the above-mentioned effect is obtained. Can't get
【００１７】ＺｒＯ2 とＴｉＯ2 は、Ａｌ2 Ｏ3 と同様
に耐候性を向上させるのに著しい効果があるが、ＺｒＯ
2 とＴｉＯ2 の合量が１５．０％より多いと、ガラスの
失透性が増し、均質なガラスの製造が困難になり、０．
１％より少ないと、上記の効果が得られない。The ZrO 2 and TiO 2 is like the Al 2 O 3 there is a significant effect in improving the weather resistance, ZrO
If the total amount of 2 and TiO 2 is more than 15.0%, the devitrification of the glass increases, and it becomes difficult to produce a homogeneous glass.
If it is less than 1%, the above effect cannot be obtained.
【００１８】ＺｎＯもガラスの耐候性を向上させると共
に、ガラスの粘度を低下させる効果を有するが、２１．
０％より多いと、ガラスの失透性が増し、１．０％より
少ないと、上記効果が得られない。ZnO also has the effect of improving the weather resistance of the glass and reducing the viscosity of the glass.
When it is more than 0%, the devitrification of the glass is increased, and when it is less than 1.0%, the above effect cannot be obtained.
【００１９】Ｌｉ2 Ｏは、ガラスの線膨張係数を大きく
する効果を有している。しかしながら１０．０％より多
いと、ガラスの耐候性、失透性が悪化するため好ましく
ない。Li 2 O has the effect of increasing the linear expansion coefficient of glass. However, if it is more than 10.0%, the weather resistance and devitrification resistance of the glass deteriorate, which is not preferable.
【００２０】Ｎａ2 Ｏ及び、Ｋ2 Ｏは、Ｌｉ2 Ｏと同様
に、ガラスの線膨張係数を大きくすると共に、ガラスの
溶融を促進する成分であるが、Ｎａ2 ＯとＫ2 Ｏが、合
量で３１．０％より多いと、ガラスの耐候性が著しく悪
化し、７．０％より少ないと、所定の線膨張係数が得ら
れないと共に、ガラスの溶融が困難になる。The Na 2 O and, K 2 O, as well as the Li 2 O, with a larger linear expansion coefficient of the glass is a component which promotes melting of glass, Na 2 O and K 2 O is, If the total amount is more than 31.0%, the weather resistance of the glass is significantly deteriorated, and if it is less than 7.0%, a predetermined linear expansion coefficient cannot be obtained and the melting of the glass becomes difficult.
【００２１】またＬｉ2 Ｏ、Ｎａ2 Ｏ、Ｋ2 Ｏの合量が
１５．０％より少ないと、所定の線膨張係数が得られ難
くなるため好ましくない。さらにその１成分の含有量
が、単独でＲ2 Ｏの総量の８０％を越えないようにする
と、混合アルカリ効果の作用によって、より優れた耐候
性と高い絶縁抵抗値を得ることが可能である。If the total content of Li 2 O, Na 2 O and K 2 O is less than 15.0%, it becomes difficult to obtain a predetermined linear expansion coefficient, which is not preferable. Further, if the content of the one component alone does not exceed 80% of the total amount of R 2 O, it is possible to obtain more excellent weather resistance and high insulation resistance value due to the action of the mixed alkali effect. ..
【００２２】Ｆｅ3 Ｏ4 は、ガラスに赤外線吸収能力を
持たせるために使用されるが、１０．０％より多いと、
ガラス化が困難となり、０．１％より少ないと、上記効
果が得られない。Fe 3 O 4 is used to impart infrared absorbing ability to glass, and if it is more than 10.0%,
Vitrification becomes difficult, and if it is less than 0.1%, the above effect cannot be obtained.
【００２３】尚、本発明のガラスにおいては、ガラスの
粘度の調整や失透性を改善する目的で、Ｆ、ＰｂＯ、Ｓ
ｒＯ、ＢａＯ、Ｂ2 Ｏ3 等の各成分を１０．０％まで添
加することが可能である。In the glass of the present invention, for the purpose of adjusting the viscosity of the glass and improving devitrification, F, PbO and S are added.
It is possible to add each component such as rO, BaO, B 2 O 3 up to 10.0%.
【００２４】[0024]
【実施例】次に本発明の赤外線吸収ガラスを実施例に基
づいて詳細に説明する。EXAMPLES Next, the infrared absorbing glass of the present invention will be described in detail based on examples.
【００２５】表１は、本発明の赤外線吸収ガラスの実施
例（試料Ｎｏ．１〜６）および比較例（試料Ｎｏ．７〜
９）の組成と特性を示すものである。Table 1 shows examples (Sample Nos. 1 to 6) and comparative examples (Sample No. 7 to) of the infrared absorbing glass of the present invention.
9 shows the composition and characteristics of 9).
【００２６】[0026]
【表１】 [Table 1]
【００２７】表に示したＮｏ．１〜９の各試料は、次の
ようにして調製した。No. shown in the table. Each sample of 1 to 9 was prepared as follows.
【００２８】まず表に示す組成になるようにガラス原料
を調合し、還元剤として木粉を添加した後、白金坩堝を
用いて１５００℃で４時間溶解した。溶解後、融液をカ
ーボン板上に流し出し、アニールすることによって各ガ
ラス試料を作製し、それらの３０〜３８０℃の温度範囲
における線膨張係数、アルカリ溶出量、赤外線透過率を
測定し、各特性を表に示した。First, glass raw materials were prepared so as to have the composition shown in the table, wood powder was added as a reducing agent, and the mixture was melted at 1500 ° C. for 4 hours using a platinum crucible. After melting, the melt was poured onto a carbon plate and annealed to prepare each glass sample, and the linear expansion coefficient, alkali elution amount, and infrared transmittance of each of them were measured in the temperature range of 30 to 380 ° C. The characteristics are shown in the table.
【００２９】表から明らかなように、本発明の実施例で
あるＮｏ．１〜６の各試料は、線膨張係数が、１２２．
２〜１３０．５×１０-7／℃であり、Ｃｏ−Ｆｅ系合金
のそれと近似しており、アルカリ溶出量が０．８５ｍｇ
未満と優れた耐候性を有していた。また赤外線透過率が
４．６％以下であるため、高い赤外線吸収能力を有して
いることが理解できる。As is apparent from the table, No. 1 which is an embodiment of the present invention. Each of the samples 1 to 6 has a coefficient of linear expansion of 122.
2 to 130.5 × 10 −7 / ° C., which is similar to that of the Co—Fe alloy and the alkaline elution amount is 0.85 mg.
And had excellent weather resistance. Further, since the infrared transmittance is 4.6% or less, it can be understood that it has a high infrared absorption ability.
【００３０】それに対し比較例であるＮｏ．７の試料
は、ＺｎＯの含有量が０．５％と少ないため、またＮ
ｏ．８の試料は、ＺｒＯ2 とＴｉＯ2 のどちらも含有し
ていないため、アルカリ溶出量が各々１．２４ｍｇ、
１．１０ｍｇ以上と高く、耐候性に劣るものと判断され
る。さらにＮｏ．９の試料は、Ｆｅ3 Ｏ4 の含有量が
０．０５％と少ないため、赤外線透過率が９０．２％と
高く、赤外線吸収能力が非常に低いことが理解できる。On the other hand, No. The sample of No. 7 has a small ZnO content of 0.5%,
o. The sample of No. 8 contained neither ZrO 2 nor TiO 2 , so the alkali elution amount was 1.24 mg each,
It is as high as 1.10 mg or more and judged to be inferior in weather resistance. Furthermore, No. It can be understood that the sample No. 9 has a high infrared transmittance of 90.2% and a very low infrared absorption capacity because the Fe 3 O 4 content is as low as 0.05%.
【００３１】尚、表中の線膨張係数は、自記示差熱膨張
計で、３０〜３８０℃の温度範囲における平均線膨張係
数を測定したものである。The coefficient of linear expansion shown in the table is a value obtained by measuring the average coefficient of linear expansion in the temperature range of 30 to 380 ° C. with a self-recording differential thermal dilatometer.
【００３２】またアルカリ溶出量は、耐候性を判断する
ために行ったものであり、ＪＩＳＲ３５０２に基づくア
ルカリ溶出試験によって測定した。すなわちガラス表面
の劣化は、空気中の水分の作用のよってガラス中のアル
カリが表面に析出して、炭酸塩や水酸化物などの反応生
成物を形成することで進むものであり、アルカリ溶出試
験でアルカリ溶出量が多いガラスほど耐候性に劣り、逆
にアルカリ溶出量の少ないガラスほど耐候性に優れてい
ると判断される。電子部品用のガラスとして、このよう
な表面の劣化は、絶縁抵抗値を下げ、そして、リードス
イッチの特性を悪化させるので、ガラスのアルカリ溶出
量が１．０ｍｇ未満であるような耐候性が要求される。The amount of alkali elution was carried out to judge the weather resistance, and was measured by an alkali elution test based on JISR3502. That is, the deterioration of the glass surface is promoted by the alkali in the glass being deposited on the surface by the action of water in the air to form reaction products such as carbonates and hydroxides. It is judged that the glass having a larger alkali elution amount is inferior in weather resistance and the glass having a smaller alkali elution amount is superior in weather resistance. As glass for electronic parts, such deterioration of the surface lowers the insulation resistance value and deteriorates the characteristics of the reed switch. Therefore, weather resistance such that the alkali elution amount of the glass is less than 1.0 mg is required. To be done.
【００３３】赤外線透過率は、ガラスを厚さ１ｍｍの板
状に加工し、次いでその両面を鏡面研磨した後、これを
分光光度計を用いて波長１０５０ｎｍにおける透過率を
測定したものである。リードスイッチを作製する際に、
効率良く封着を行うためには、赤外線透過率が１０％以
下であることが必要である。The infrared transmittance is obtained by processing glass into a plate having a thickness of 1 mm, mirror-polishing both surfaces thereof, and then measuring the transmittance at a wavelength of 1050 nm using a spectrophotometer. When making a reed switch,
In order to perform the sealing efficiently, the infrared transmittance needs to be 10% or less.
【００３４】[0034]
【発明の効果】以上のように本発明の赤外線吸収ガラス
は、Ｃｏ−Ｆｅ系合金からなる磁性線材との封着に適し
た１１０〜１３５×１０-7／℃の線熱膨張係数を有し、
しかも優れた耐候性と赤外線吸収能力を有するため、高
い信頼性が要求される電子部品用等の大電流負荷型リー
ドスイッチ用ガラスとして好適である。As described above, the infrared absorbing glass of the present invention has a coefficient of linear thermal expansion of 110 to 135 × 10 -7 / ° C., which is suitable for sealing with a magnetic wire made of a Co--Fe alloy. ,
Moreover, since it has excellent weather resistance and infrared absorbing ability, it is suitable as a glass for a large current load type reed switch for electronic parts and the like, which requires high reliability.
Claims (3)
６．０％、Ａｌ2 Ｏ3０．５〜１５．０％、ＺｒＯ2 ＋
ＴｉＯ2 ０．１〜１５．０％、ＺｎＯ １．０〜２
１．０％、Ｌｉ2 Ｏ ０〜１０．０％、Ｎａ2 Ｏ＋Ｋ2
Ｏ ７．０〜３１．０％、Ｆｅ3 Ｏ4 ０．１〜１０．
０％の組成を有し、３０〜３８０℃の温度範囲における
線膨張係数が１１０〜１３５×１０-7／℃であり、優れ
た耐候性を有することを特徴とする赤外線吸収ガラス。1. A weight percentage of SiO 2 40.0-6.
6.0%, Al 2 O 3 0.5-15.0%, ZrO 2 +
TiO 2 0.1-15.0%, ZnO 1.0-2
1.0%, Li 2 O 0~10.0% , Na 2 O + K 2
O 7.0 to 31.0%, Fe 3 O 4 0.1 to 10.
An infrared absorbing glass having a composition of 0%, a coefficient of linear expansion in a temperature range of 30 to 380 ° C. of 110 to 135 × 10 −7 / ° C., and excellent weather resistance.
５．０％、Ａｌ2 Ｏ3１．０〜１３．０％、ＺｒＯ2 ＋
ＴｉＯ2 ０．５〜１３．０％、ＺｎＯ ２．５〜２
０．０％、Ｌｉ2 Ｏ ０．３〜８．０％、Ｎａ2 Ｏ＋Ｋ
2 Ｏ ８．０〜３０．０％、Ｆｅ3 Ｏ4 ０．５〜９．
０％の組成を有し、３０〜３８０℃の温度範囲における
線膨張係数が１１０〜１３５×１０-7／℃であり、優れ
た耐候性を有することを特徴とする請求項１の赤外線吸
収ガラス。2. SiO 2 45.0-6 by weight percentage.
5.0%, Al 2 O 3 1.0 to 13.0%, ZrO 2 +
TiO 2 0.5-13.0%, ZnO 2.5-2
0.0%, Li 2 O 0.3 to 8.0%, Na 2 O + K
2 O 8.0 to 30.0%, Fe 3 O 4 0.5 to 9.
The infrared absorbing glass according to claim 1, which has a composition of 0%, a coefficient of linear expansion in a temperature range of 30 to 380 ° C. of 110 to 135 × 10 −7 / ° C., and excellent weather resistance. ..
５．０％以上であり、その１成分の含有量が、単独でＲ
2 Ｏ（ただしＲは、Ｌｉ、Ｎａ、Ｋを示す）の総量の８
０％を越えないことを特徴とする請求項１または２の赤
外線吸収ガラス。3. The total amount of Li 2 O, Na 2 O and K 2 O is 1.
5.0% or more, the content of one component is R alone
8 of the total amount of 2 O (where R represents Li, Na, K)
The infrared absorption glass according to claim 1 or 2, which does not exceed 0%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25306991A JPH0694378B2 (en) | 1991-09-03 | 1991-09-03 | Infrared absorbing glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25306991A JPH0694378B2 (en) | 1991-09-03 | 1991-09-03 | Infrared absorbing glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0558671A true JPH0558671A (en) | 1993-03-09 |
| JPH0694378B2 JPH0694378B2 (en) | 1994-11-24 |
Family
ID=17246062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25306991A Expired - Lifetime JPH0694378B2 (en) | 1991-09-03 | 1991-09-03 | Infrared absorbing glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0694378B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001114531A (en) * | 1999-10-19 | 2001-04-24 | Nippon Sheet Glass Co Ltd | Glass composition, substrate for information recording medium using the same, information recording medium and information recorder |
| US6465105B1 (en) | 1999-08-02 | 2002-10-15 | Hoya Corporation | WDM optical filter and glass substrate for use in the WDM optical filter |
| JP2004067460A (en) * | 2002-08-07 | 2004-03-04 | Central Glass Co Ltd | Glass composition |
| US6727198B1 (en) * | 1998-06-24 | 2004-04-27 | Nippon Electric Glass Co., Ltd. | Infrared absorbing glass for reed switch |
| US6935138B2 (en) | 1999-08-30 | 2005-08-30 | Nippon Electric Glass Co., Ltd. | Infra-red absorption glass for a reed switch |
| WO2017059001A1 (en) * | 2015-09-29 | 2017-04-06 | Corning Incorporated | Glass article with high coefficient of thermal expansion |
-
1991
- 1991-09-03 JP JP25306991A patent/JPH0694378B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6727198B1 (en) * | 1998-06-24 | 2004-04-27 | Nippon Electric Glass Co., Ltd. | Infrared absorbing glass for reed switch |
| US6465105B1 (en) | 1999-08-02 | 2002-10-15 | Hoya Corporation | WDM optical filter and glass substrate for use in the WDM optical filter |
| US6935138B2 (en) | 1999-08-30 | 2005-08-30 | Nippon Electric Glass Co., Ltd. | Infra-red absorption glass for a reed switch |
| JP2001114531A (en) * | 1999-10-19 | 2001-04-24 | Nippon Sheet Glass Co Ltd | Glass composition, substrate for information recording medium using the same, information recording medium and information recorder |
| JP4518291B2 (en) * | 1999-10-19 | 2010-08-04 | Ｈｏｙａ株式会社 | Glass composition and substrate for information recording medium, information recording medium and information recording apparatus using the same |
| JP2004067460A (en) * | 2002-08-07 | 2004-03-04 | Central Glass Co Ltd | Glass composition |
| WO2017059001A1 (en) * | 2015-09-29 | 2017-04-06 | Corning Incorporated | Glass article with high coefficient of thermal expansion |
| US10676389B2 (en) | 2015-09-29 | 2020-06-09 | Corning Incorporated | Glass article with high coefficient of thermal expansion |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0694378B2 (en) | 1994-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0822169B1 (en) | Glass composition | |
| JP2971502B2 (en) | Kovar sealing glass composition | |
| US4310357A (en) | Low temperature sealing glass | |
| JP2000203873A (en) | Glass composition for lamp, stem for lamp and bulb for lamp | |
| US3441422A (en) | Coating glasses for electrical devices | |
| US4277285A (en) | Sealing glass with high coefficient of absorption for infra-red rays | |
| JPH0114185B2 (en) | ||
| US5977001A (en) | Glass composition | |
| JP3902333B2 (en) | Infrared absorbing glass for reed switch | |
| JPH0558671A (en) | Ir ray-absorbing glass | |
| JP4093353B2 (en) | Frit for sealing metal vacuum double structure container and metal vacuum double structure container | |
| JP2663577B2 (en) | Sealing composition | |
| US3949335A (en) | Reed switch construction | |
| WO2001090012A1 (en) | Glass composition and glass forming material comprising said composition | |
| JPH07101748A (en) | Substrate for glass-made panel | |
| US3307958A (en) | Ceramic material | |
| JPH04310537A (en) | Infrared absorbing glass | |
| US3455708A (en) | Ceramic material | |
| JPS6344699B2 (en) | ||
| EP0156526B1 (en) | Low pbo - containing glass for electrical devices | |
| JPH0624797A (en) | Glass for bonding or sealing | |
| JPS5860638A (en) | Glass for fluorescent lighting | |
| JPS59131542A (en) | Sealing composition | |
| JPH0891870A (en) | Frit for crt | |
| JPS62153142A (en) | Ultraviolet ray transmitting glass |