JP2001031442A - Glass composition for electric lamp - Google Patents
Glass composition for electric lampInfo
- Publication number
- JP2001031442A JP2001031442A JP11207585A JP20758599A JP2001031442A JP 2001031442 A JP2001031442 A JP 2001031442A JP 11207585 A JP11207585 A JP 11207585A JP 20758599 A JP20758599 A JP 20758599A JP 2001031442 A JP2001031442 A JP 2001031442A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- bao
- content
- composition
- glass composition
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、各種の照明用機器、例
えば蛍光灯、白熱電球、小型豆球等のバルブ部やステム
部に使用される電灯用ガラス組成物に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass composition for an electric lamp used for various lighting equipment, for example, a bulb portion or a stem portion of a fluorescent lamp, an incandescent lamp, a small bead bulb, and the like.
【０００２】[0002]
【従来の技術】一般に、照明用機器に使用されるガラス
は、バルブ部とステム部に大別される。2. Description of the Related Art Generally, glass used for lighting equipment is roughly divided into a bulb portion and a stem portion.
【０００３】例えば蛍光灯では、直管や直管を熱加工し
た環形の形状を有するものが一般的であるが、最近では
Ｕ字管やこれを繋いだツイン管といったように複雑なバ
ルブ形状を有するものが開発されている。当初、こうい
った特殊形状のバルブには、加工を容易にするために、
ＰｂＯを比較的多量に含む低粘度の鉛ガラスで作製され
ていたが、現在ではＰｂＯの毒性問題を回避するために
ＢａＯやＢ2 Ｏ3 を含む非鉛ガラスに切り替えられてい
る。For example, a fluorescent lamp generally has a straight pipe or an annular shape obtained by thermally processing a straight pipe, but recently, a complicated bulb shape such as a U-shaped pipe or a twin pipe connecting the pipes has been developed. Have been developed. Initially, these specially-shaped valves have
It was made of a low-viscosity lead glass containing a relatively large amount of PbO, but has now been switched to a lead-free glass containing BaO or B 2 O 3 to avoid the toxicity problem of PbO.
【０００４】一方、ステム部には複雑な形状に加工でき
ることやリーク電流を発生させないことが要求されるた
め、優れた加工性と高い電気抵抗を有する鉛ガラスが使
用されているが、バルブ部と同様の理由から、上記した
ＢａＯやＢ2 Ｏ3 を含む非鉛ガラスに切り替えられつつ
ある。On the other hand, since the stem portion is required to be able to be processed into a complicated shape and not to generate a leak current, lead glass having excellent workability and high electric resistance is used. For the same reason, the use of lead-free glass containing BaO or B 2 O 3 described above is being switched.
【０００５】[0005]
【発明が解決しようとする課題】ところでこの用途に使
用されるガラス管は、ダンナー法で作製されるのが一般
的である。この方法は、スリーブと呼ばれる中空円筒状
のアルミナ質耐火物の外周面に溶融ガラスを巻き付け、
スリーブ先端からエアーを出しながらガラスを引っ張る
ことによって管状に成形する方法であり、エアー量とガ
ラスの引っ張り速度を調整することによって、種々の外
径や肉厚を有するガラス管を製造することが可能であ
る。しかしながらダンナー法によってＢａＯを多量に含
むガラスを成形すると、ガラス中のＳｉＯ2 成分やＢａ
Ｏ成分と、スリーブ中のＡｌ2 Ｏ3 成分が反応しやす
く、その結果、バリウム長石と呼ばれるＢａＯ−Ａｌ2
Ｏ3 −ＳｉＯ2 系の失透物が生成し、ガラス製品中に混
入してしまう。The glass tube used for this purpose is generally manufactured by a Danner method. In this method, molten glass is wound around the outer peripheral surface of a hollow cylindrical alumina refractory called a sleeve,
It is a method of forming a tube by pulling glass while bleeding air from the end of the sleeve, and it is possible to manufacture glass tubes with various outer diameters and wall thicknesses by adjusting the amount of air and the pulling speed of glass It is. However, when a glass containing a large amount of BaO is formed by the Danner method, the SiO 2 component in the glass and the Ba
The O component and the Al 2 O 3 component in the sleeve are apt to react with each other, and as a result, BaO-Al 2
O 3 —SiO 2 -based devitrified materials are generated and mixed into glass products.
【０００６】またガラス中に含まれるＢ2 Ｏ3 は、ガラ
ス製造中に揮発して作業環境を汚染し易く、これを防止
するために特別な設備を必要とする。Further, B 2 O 3 contained in glass tends to volatilize during glass production and contaminate the working environment, and special equipment is required to prevent this.
【０００７】本発明は、上記事情に鑑みなされたもので
あり、ダンナー法によって管ガラスを成形する場合でも
スリーブとの界面で失透物が生成し難く、またガラス製
造中にＢ2Ｏ3の揮発がなく、しかも加工性及び電気絶縁
性が良好な電灯用ガラス組成物を提供することを目的と
する。The present invention has been made in view of the above circumstances. Even when a tube glass is formed by a Danner method, a devitrified material is hardly generated at an interface with a sleeve, and B 2 O 3 is produced during glass production. An object of the present invention is to provide a glass composition for an electric lamp that is free from volatilization and has good workability and electrical insulation.
【０００８】[0008]
【課題を解決するための手段】本発明の電灯用ガラス組
成物は、重量百分率で、ＳｉＯ2 ６０〜７５％、Ａｌ
2 Ｏ3 １〜５％、Ｎａ2 Ｏ ３〜１３％、Ｋ2 Ｏ ２
〜１０％、Ｌｉ2 Ｏ０〜５％、ＣａＯ ０〜５％、Ｍｇ
Ｏ ０〜５％、ＳｒＯ １〜１２％、ＢａＯ０〜３．８
％の組成を有し、Ｎａ2 Ｏ／Ｋ2 Ｏ≧１、（ＣａＯ＋Ｍ
ｇＯ＋ＳｒＯ＋ＢａＯ）／（Ｎａ2 Ｏ＋Ｋ2 Ｏ＋Ｌｉ2
Ｏ）≧０．８５であり、本質的にＢ 2 Ｏ3 を含有しない
ことを特徴とする。DISCLOSURE OF THE INVENTION The glass set for an electric lamp of the present invention
The composition is, in weight percent, SiO 2Two 60-75%, Al
Two OThree 1-5%, NaTwo O 3-13%, KTwo O 2
-10%, LiTwo O0-5%, CaO 0-5%, Mg
O 0-5%, SrO 1-12%, BaO 0-3.8
% Composition and NaTwo O / KTwo O ≧ 1, (CaO + M
gO + SrO + BaO) / (NaTwo O + KTwo O + LiTwo
O) ≧ 0.85 and essentially B Two OThree Does not contain
It is characterized by the following.
【０００９】[0009]
【作用】電灯用ガラス組成物に求められる特性を以下に
示す。The characteristics required of the glass composition for electric lamps are shown below.
【００１０】バルブ部に用いられるガラスには、優れ
た加工性を得るために、作業温度（１０4ｄＰａ．ｓ）
が１０００℃以下であること、輝度劣化が起こりにく
いこと（より具体的には、ソラリゼーションが起こりに
くいことや、ＪＩＳ Ｒ−３５０２で定めるアルカリ溶
出量が０．３ｍｇ以下であること）等が望まれる。[0010] In order to obtain excellent workability, the glass used for the bulb portion has an operating temperature (10 4 dPa.s).
Is desired to be 1000 ° C. or less, less likely to cause luminance degradation (more specifically, less likely to cause solarization, and the amount of alkali elution specified in JIS R-3502 being 0.3 mg or less). .
【００１１】ステム部に用いられるガラスには、優れ
た加工性を得るために、作業温度（１０4ｄｐ．ｓ）が
１０００℃以下であること、電気導入部に当たるため
に高い電気絶縁性が要求され、２５０℃における電気抵
抗値が１０8.2 Ω・ｃｍ以上であること、封合するデ
ュメット線との膨張が適合するように、３０〜３８０℃
における熱膨張係数が９０〜１００×１０-7／℃である
こと等が望まれる。In order to obtain excellent workability, the glass used for the stem must have a working temperature (10 4 dp.s) of 1000 ° C. or less, and high electrical insulation to meet the electricity inlet. 30 to 380 ° C. so that the electric resistance at 250 ° C. is 10 8.2 Ω · cm or more and the expansion with the Dumet wire to be sealed is compatible.
Is desired to have a thermal expansion coefficient of 90 to 100 × 10 −7 / ° C.
【００１２】ところで本発明の電灯用ガラス組成物は、
スリーブとの界面での反応を抑制するためにＢａＯを
３．８％以下に制限し、且つ、Ｂ2 Ｏ3 成分の揮発を防
止するためにＢ2Ｏ3を本質的に含有しないことを特徴と
するが、ＢａＯやＢ2 Ｏ3 の含有量を制限すると加工性
が悪化する傾向にある。そこでＮａ2 Ｏ／Ｋ2 Ｏを１以
上に調整することによって、作業温度を１０００℃以下
にして加工性を改善している。さらにＮａ2 Ｏ／Ｋ2 Ｏ
比を上記割合にすると電気絶縁性が悪化する傾向がある
が、（ＣａＯ＋ＭｇＯ＋ＳｒＯ＋ＢａＯ）／（Ｎａ2 Ｏ
＋Ｋ2 Ｏ＋Ｌｉ2Ｏ）を０．８５以上に調整することに
よって電気絶縁性を改善している。このため本発明のガ
ラス組成物は、バルブ用途、ステム用途の何れにも使用
可能である。By the way, the glass composition for an electric lamp of the present invention comprises:
Of BaO in order to suppress the reaction at the interface between the sleeve and limited to less than 3.8%, and, characterized in that it does not contain B 2 O 3 essentially in order to prevent volatilization of B 2 O 3 component However, if the content of BaO or B 2 O 3 is restricted, the workability tends to deteriorate. Therefore, by adjusting the ratio of Na 2 O / K 2 O to 1 or more, the working temperature is reduced to 1000 ° C. or less to improve the workability. Further, Na 2 O / K 2 O
When the ratio is set to the above ratio, the electrical insulation tends to deteriorate, but (CaO + MgO + SrO + BaO) / (Na 2 O)
+ K 2 O + Li 2 O) is adjusted to 0.85 or more to improve the electrical insulation. Therefore, the glass composition of the present invention can be used for both bulb use and stem use.
【００１３】本発明の電灯用ガラス組成物の組成範囲を
限定した理由は、次のとおりである。The reasons for limiting the composition range of the glass composition for electric lamps of the present invention are as follows.
【００１４】ＳｉＯ2 は、ガラス形成酸化物として必須
物質で、ガラス中で骨格を形成する成分であり、その含
有量は６０〜７５％、好ましくは６３〜７３％である。
ＳｉＯ2 が６０％より少ないと、ガラスの電気絶縁性や
化学耐久性が低下し、７５％より多いと、ガラスの溶融
が困難となる。[0014] SiO 2 is an essential substance as a glass-forming oxide and is a component forming a skeleton in glass, and its content is 60 to 75%, preferably 63 to 73%.
If the content of SiO 2 is less than 60%, the electrical insulation and chemical durability of the glass will be reduced.
【００１５】Ａｌ2 Ｏ3 は、化学耐久性を向上させる成
分であり、その含有量は１〜５％、好ましくは１〜４％
である。Ａｌ2 Ｏ3 が１％より少ないと、化学耐久性が
劣化し、アルカリ成分が溶出し易くなり、５％より多い
と、ガラスの溶融成形が困難となる。Al 2 O 3 is a component for improving chemical durability, and its content is 1 to 5%, preferably 1 to 4%.
It is. If the content of Al 2 O 3 is less than 1%, the chemical durability deteriorates, and the alkali component is easily eluted. If the content is more than 5%, it becomes difficult to melt-mold the glass.
【００１６】Ｎａ2 Ｏ、Ｋ2 Ｏ及びＬｉ2 Ｏといったア
ルカリ金属酸化物（以下、Ｒ2 Ｏという）は、ガラスの
粘性を低下させて溶融性や加工性を向上させるととも
に、ガラスの熱膨張係数を調整するための成分である。Alkali metal oxides (hereinafter, referred to as R 2 O) such as Na 2 O, K 2 O and Li 2 O lower the viscosity of the glass to improve the melting property and workability, and at the same time, the thermal expansion of the glass. This is a component for adjusting the coefficient.
【００１７】Ｎａ2 Ｏの含有量は３〜１３％、好ましく
は３〜１０％である。Ｎａ2 Ｏが３％より少ないとガラ
スの粘度が上がって加工性が悪くなり、１３％より多い
と電気絶縁性が悪化する。The content of Na 2 O is 3 to 13%, preferably 3 to 10%. If the content of Na 2 O is less than 3%, the viscosity of the glass increases and the workability deteriorates. If the content is more than 13%, the electrical insulation deteriorates.
【００１８】Ｋ2 Ｏの含有量は２〜１０％、好ましくは
２〜６％である。Ｋ2 Ｏが２％より少ないと電気絶縁性
が悪化し、１０％より多いと加工性が悪化する。The content of K 2 O is 2 to 10%, preferably 2 to 6%. If the content of K 2 O is less than 2%, the electrical insulation property deteriorates, and if it is more than 10%, the workability deteriorates.
【００１９】Ｌｉ2 Ｏの含有量は０〜５％、好ましくは
０〜３％である。Ｌｉ2 Ｏが５％より多いと原料コスト
が高くなり好ましくない。The content of Li 2 O is 0 to 5%, preferably 0 to 3%. If the content of Li 2 O is more than 5%, the raw material cost is undesirably increased.
【００２０】ＣａＯ、ＭｇＯ、ＳｒＯ及びＢａＯといっ
たアルカリ土類金属酸化物（以下、ＲＯという）は、優
れた加工性と、高い電気抵抗や化学耐久性をガラスに付
与する成分である。Alkaline earth metal oxides (hereinafter referred to as RO) such as CaO, MgO, SrO and BaO are components that impart excellent workability, high electric resistance and chemical durability to glass.
【００２１】ＣａＯの含有量は０〜５％、好ましくは、
０〜４％である。ＣａＯが５％を超えると加工性が悪く
なり、失透の原因となる。The content of CaO is from 0 to 5%, preferably
0 to 4%. If the content of CaO exceeds 5%, workability deteriorates and causes devitrification.
【００２２】ＭｇＯの含有量は０〜５％、好ましくは、
０〜３％である。ＭｇＯが５％を超えると原料コストが
高くなり好ましくない。The content of MgO is 0 to 5%, preferably
0 to 3%. If the content of MgO exceeds 5%, the raw material cost increases, which is not preferable.
【００２３】ＳｒＯは、ＲＯの中でも加工性や電気絶縁
性を改善する効果が大きい成分であり、その含有量は１
〜１２％、好ましくは３〜７％である。ＳｒＯが１％よ
り少ないと上記効果がなく、１２％より多いとガラス中
にＳｒ系の失透が生成し、また原料コストが高くなり好
ましくない。SrO is a component of RO having a large effect of improving workability and electrical insulation, and its content is 1%.
-12%, preferably 3-7%. If the content of SrO is less than 1%, the above effect is not obtained. If the content is more than 12%, Sr-based devitrification is generated in the glass, and the raw material cost is increased, which is not preferable.
【００２４】ＢａＯの含有量は、０〜３．８％である。
ＢａＯが３．８％を超えるとガラス中にバリウム長石が
生成しやすくなって好ましくない。なおＢａＯは、環境
面から、その使用量をできる限り少なくすることが望ま
しい。The content of BaO is 0 to 3.8%.
When BaO exceeds 3.8%, barium feldspar is easily generated in the glass, which is not preferable. It is desirable that the amount of BaO used is as small as possible from an environmental point of view.
【００２５】さらにＮａ2 ＯとＫ2 Ｏの比率をＮａ2 Ｏ
／Ｋ2 Ｏ≧１、好ましくはＮａ2 Ｏ／Ｋ2 Ｏ≧１．３と
することにより、Ｂ2 Ｏ3 を含有しない場合でも、作業
温度を１０００℃以下にすることができる。またＲＯ成
分は上記したように電気絶縁性を向上させる効果が大き
く、特にＲＯ／Ｒ2 Ｏ≧０．８５、好ましくはＲＯ／Ｒ
2 Ｏ≧０．９０とすることにより、加工性は若干劣るも
のの、２５０℃における電気抵抗値を１０8.2 Ω・ｃｍ
以上とすることができる。[0025] The addition of Na 2 O and K 2 O ratio of Na 2 O
By setting / K 2 O ≧ 1, preferably Na 2 O / K 2 O ≧ 1.3, the working temperature can be kept at 1000 ° C. or lower even when B 2 O 3 is not contained. Further, the RO component has a large effect of improving the electrical insulation as described above, and in particular, RO / R 2 O ≧ 0.85, preferably RO / R
With 2 O ≧ 0.90, although the workability is somewhat inferior, the electric resistance value at 250 ℃ 10 8.2 Ω · cm
The above can be considered.
【００２６】なお本発明においては、上記成分以外にも
所定の特性を損なわない限り、種々の成分が添加可能で
ある。In the present invention, various components other than the above components can be added as long as the predetermined characteristics are not impaired.
【００２７】例えば紫外線吸収の目的でＦｅ2 Ｏ3 を
０．２％まで添加することができる。なおＦｅ2 Ｏ3 が
０．２％を超えるとバルブの透過率低下を招くために好
ましくない。For example, Fe 2 O 3 can be added up to 0.2% for the purpose of absorbing ultraviolet rays. Note that if the content of Fe 2 O 3 exceeds 0.2%, the transmittance of the bulb is undesirably reduced.
【００２８】またソラリゼーション防止や紫外線吸収の
目的でＴｉＯ2 やＣｅＯ2 を各々３％まで添加すること
ができる。なおＴｉＯ2 が３％を超えると不純物として
微量のＦｅ2 Ｏ3 が含まれる場合に黄褐色の着色を起こ
し、バルブの透過率低下を招く。ＣｅＯ2が３％を超え
ると原料コストが高くなり好ましくない。TiO 2 and CeO 2 can be added up to 3% each for the purpose of preventing solarization and absorbing ultraviolet rays. If the content of TiO 2 exceeds 3%, a slight amount of Fe 2 O 3 is contained as an impurity to cause yellowish brown coloring, which causes a decrease in the transmittance of the bulb. If the content of CeO 2 exceeds 3%, the raw material cost increases, which is not preferable.
【００２９】また清澄剤としてＳｂ2 Ｏ3 を１％まで、
Ａｓ2 Ｏ3 、Ｆ、ＳＯ3 、Ｃｌ等を合量で０．５％まで
添加することもできる。Further, Sb 2 O 3 is used as a fining agent up to 1%.
As 2 O 3 , F, SO 3 , Cl and the like may be added up to a total amount of 0.5%.
【００３０】また自動車のストップランプや方向指示器
用ランプ等の用途に使用する場合、赤色や橙色の着色の
ためにＣｕ、Ａｇ、Ａｕ等の着色剤を添加することがで
きる。When used in applications such as stop lamps and turn signal lamps of automobiles, coloring agents such as Cu, Ag and Au can be added for coloring red or orange.
【００３１】以上の組成を有する本発明の電灯用ガラス
組成物は、作業温度（１０4ｄＰａ．ｓ）が１０００℃
以下、２５０℃での電気抵抗値が１０8.2 Ω・ｃｍ以
上、ＪＩＳ Ｒ−３５０２で定めるアルカリ溶出量が
０．３ｍｇ以下、３０〜３８０℃における熱膨張係数が
９０〜１００×１０-7／℃である。The lighting glass composition of the present invention having the above composition has an operating temperature (10 4 dPa.s) of 1000 ° C.
Hereinafter, the electric resistance value at 250 ° C. is 10 8.2 Ω · cm or more, the alkali elution amount specified in JIS R-3502 is 0.3 mg or less, and the coefficient of thermal expansion at 30 to 380 ° C. is 90 to 100 × 10 −7 / ° C. It is.
【００３２】[0032]
【実施例】以下、本発明の電灯用ガラス組成物を実施例
に基づいて詳細に説明する。EXAMPLES Hereinafter, the glass composition for electric lamps of the present invention will be described in detail with reference to Examples.
【００３３】表１、２は本発明の実施例（試料Ｎｏ．１
〜１０）、表３は比較例（試料Ｎｏ．１１〜１４）を示
している。なおＮｏ．１１の試料は、Ｂ2 Ｏ3 を含む従
来の非鉛ガラスである。Tables 1 and 2 show examples of the present invention (sample No. 1).
10) and Table 3 show comparative examples (sample Nos. 11 to 14). No. Eleven samples are conventional lead-free glasses containing B 2 O 3 .
【００３４】[0034]
【表１】 [Table 1]
【００３５】[0035]
【表２】 [Table 2]
【００３６】[0036]
【表３】 [Table 3]
【００３７】表１〜３の各試料は、次のようにして作製
した。The samples shown in Tables 1 to 3 were prepared as follows.
【００３８】まず表中の組成となるように石粉、水酸化
アルミニウム、ドロマイト、水酸化マグネシウム、ソー
ダ灰、炭酸カリウム、炭酸リチウム、炭酸バリウム、炭
酸ストロンチウム、酸化チタン、酸化第二鉄、酸化セリ
ウム、芒硝、三酸化アンチモン、酸化第一銅、及び硼砂
を調合し、Ｐｔ−Ｒｈ製ルツボに入れた後、これを箱型
電気炉に入れて加熱溶融した。なお溶融の途中で、ガラ
スを均質化するためＰｔ製撹拌棒で強制撹拌した。次い
で溶融ガラスを成形し、アニールした後、熱膨張係数、
粘性特性（歪点、徐冷点、軟化点、作業温度、溶融温
度）、電気抵抗値、アルカリ溶出量、液相温度、及びＡ
ｌ系耐火物との反応性について評価した。また試料Ｎ
ｏ．１、２、１１、１３及び１４については、ガラスか
らの揮発量についても評価した。結果を表４〜６に示
す。First, stone powder, aluminum hydroxide, dolomite, magnesium hydroxide, soda ash, potassium carbonate, lithium carbonate, barium carbonate, strontium carbonate, titanium oxide, ferric oxide, cerium oxide, so as to have the composition shown in the table. Glauber's salt, antimony trioxide, cuprous oxide, and borax were mixed, put into a Pt-Rh crucible, and then put into a box-type electric furnace and heated and melted. In the course of melting, the glass was forcibly stirred with a Pt stirring rod to homogenize the glass. Next, after forming and annealing the molten glass, the thermal expansion coefficient,
Viscous properties (strain point, annealing point, softening point, working temperature, melting temperature), electric resistance value, alkali elution amount, liquid phase temperature, and A
The reactivity with l-type refractories was evaluated. Sample N
o. As for 1, 2, 11, 13 and 14, the amount of volatilization from glass was also evaluated. The results are shown in Tables 4 to 6.
【００３９】[0039]
【表４】 [Table 4]
【００４０】[0040]
【表５】 [Table 5]
【００４１】[0041]
【表６】 [Table 6]
【００４２】表から明らかなように、実施例であるＮ
ｏ．１〜１０の各試料は、作業温度が１０００℃以下と
低く、加工性に優れていた。また電気抵抗値が１０8.2
Ω・ｃｍ以上と高く、電気絶縁性に優れていた。しかも
耐火物テストの結果は、いずれも良好であった。さらに
ＣｕＯを含むＮｏ．１０の試料は、自動車のストップラ
ンプ等に使用可能な赤色の色調を呈していた。As is clear from the table, the embodiment N
o. Each of the samples 1 to 10 had an operation temperature as low as 1000 ° C. or less, and was excellent in workability. The electric resistance value is 108.2
It was as high as Ω · cm or more and was excellent in electrical insulation. Moreover, the results of the refractory tests were all good. In addition, No. The ten samples exhibited a red color tone that could be used for stop lamps of automobiles and the like.
【００４３】一方、比較例であるＮｏ．１１の試料は、
電気抵抗値、粘性特性等の特性は実施例とほぼ同等であ
ったが、Ｂ2Ｏ3を含有しているために揮発量が０．４７
ｇと非常に多く、環境上好ましくない。さらに揮発物に
ついて分析したところ、Ｂ2Ｏ3の揮発量が０．３ｇと大
半を占めていることが確認された。Ｎｏ．１２の試料
は、ＢａＯを多量に含むために耐火物との反応が認めら
れた。Ｎｏ．１３の試料は、Ｎａ2Ｏ／Ｋ2Ｏが１未満で
あるために、作業温度が１０００℃を超えていた。Ｎ
ｏ．１４の試料は、Ｎａ2Ｏ／Ｋ2Ｏが１以上であるため
作業温度が低かったものの、ＲＯ／Ｒ2Ｏが０．８５未
満であるために、電気抵抗値が低かった。On the other hand, in Comparative Example No. Eleven samples were
The properties such as the electric resistance value and the viscous property were almost the same as those of the example, but the volatilization amount was 0.47 due to the inclusion of B 2 O 3.
g, which is extremely unfavorable in the environment. Further analysis of volatiles confirmed that the amount of volatiles of B 2 O 3 accounted for 0.3 g and accounted for the majority. No. Twelve samples contained a large amount of BaO, and were found to react with the refractory. No. Thirteen samples had working temperatures above 1000 ° C. due to Na 2 O / K 2 O less than 1. N
o. The working temperature of Sample No. 14 was low because Na 2 O / K 2 O was 1 or more, but the electrical resistance value was low because RO / R 2 O was less than 0.85.
【００４４】なお熱膨張係数は、３０〜３８０℃におけ
る平均線熱膨張係数を示すものであり、ディラトメータ
ーを用いて測定した。歪点は１０14.5ｄＰａ・ｓの粘度
を示す温度、徐冷点は１０13ｄＰａ・ｓの粘度を示す温
度、軟化点は１０7.6 ｄＰａ・ｓの粘度を示す温度、作
業温度は１０4 ｄＰａ・ｓの粘度を示す温度、溶融温度
は１０2 ｄＰａ・ｓの粘度を示す温度である。電気抵抗
値は、ＡＳＴＭ Ｃ６５７−７８に基づき測定し、２５
０℃での抵抗値を対数表示した。アルカリ溶出量は、Ｊ
ＩＳ Ｒ−３５０２に基づいて測定したものである。液
相温度は、傾斜円筒型電気炉にて、最高温度９００℃、
温度勾配３００℃、保持時間１６時間の条件で測定し
た。Ａｌ耐火物との反応性は、ガラスをムライト耐火物
に接触させた状態で、温度勾配炉に入れて熱処理を行
い、ガラス中に生成する失透物の量を目視で観察したも
のである。ガラス中に失透物が生成しなかったものを
◎、わずかに失透物が生成したが、実用上使用可能なも
のを○、多量に失透物が生成し、使用できないものを×
とした。揮発量の測定は、Ｐｔ製坩堝を使用してガラス
を溶融し、溶融後の減量分をガラス原料１００ｇ当たり
に換算して記載した。The coefficient of thermal expansion indicates an average coefficient of linear thermal expansion at 30 to 380 ° C., and was measured using a dilatometer. The strain point is a temperature indicating a viscosity of 10 14.5 dPa · s, the annealing point is a temperature indicating a viscosity of 10 13 dPa · s, the softening point is a temperature indicating a viscosity of 10 7.6 dPa · s, and the working temperature is 10 4 dPa · s. The temperature indicating the viscosity of s and the melting temperature are the temperatures indicating the viscosity of 10 2 dPa · s. The electric resistance value was measured based on ASTM C657-78 and was 25%.
The resistance value at 0 ° C. was logarithmically indicated. The alkali elution amount is J
It is measured based on ISR-3502. The liquid phase temperature is 900 ° C in the inclined cylindrical electric furnace,
The measurement was performed under the conditions of a temperature gradient of 300 ° C. and a holding time of 16 hours. The reactivity with the Al refractory is determined by visually observing the amount of the devitrified substance generated in the glass in a state where the glass is brought into contact with the mullite refractory and subjected to a heat treatment in a temperature gradient furnace. ◎ indicates that no devitrified material was generated in the glass, わ ず か indicates that a slight devitrified product was generated, but 実 用 indicates that it was practically usable, and × indicates that a large amount of devitrified material was generated and could not be used.
And The measurement of the volatilization amount was described by melting the glass using a Pt crucible and converting the reduced amount after melting to 100 g of glass raw material.
【００４５】[0045]
【発明の効果】以上のように本発明の電灯用ガラス組成
物は、ダンナー法によって管ガラスを成形する場合でも
スリーブとの界面で失透物が生成し難く、またガラス製
造中にＢ2Ｏ3の揮発がなく、しかも加工性及び電気絶縁
性が良好である。Lamp glass composition of the present invention as described above, according to the present invention, the surfactant devitrification product is hardly produced in the sleeve, even when molding glass tube by Danner method, also B 2 O in the glass manufacturing No volatilization of 3 , and good workability and electrical insulation.
【００４６】従って、蛍光灯、白熱電球、小型豆球等の
バルブ部やステム部に使用される電灯用ガラスとして好
適である。Therefore, it is suitable as a glass for an electric lamp used for a bulb portion or a stem portion of a fluorescent lamp, an incandescent lamp, a small pea ball and the like.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 4G062 AA03 BB01 DA06 DA07 DB03 DC01 DD01 DE01 DF01 EA01 EA02 EA03 EB03 EB04 EC03 ED01 ED02 ED03 EE01 EE02 EE03 EF03 EF04 EG01 EG02 EG03 FA01 FA10 FB01 FC01 FD01 FE01 FF01 FG01 FH01 FJ01 FK01 FL01 GA01 GA10 GB01 GC01 GD01 GE01 HH01 HH03 HH05 HH07 HH09 HH11 HH13 HH15 HH17 HH20 JJ01 JJ03 JJ05 JJ07 JJ10 KK01 KK03 KK05 KK07 KK10 MM24 NN26 NN34 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4G062 AA03 BB01 DA06 DA07 DB03 DC01 DD01 DE01 DF01 EA01 EA02 EA03 EB03 EB04 EC03 ED01 ED02 ED03 EE01 EE02 EE03 EF03 EF04 EG01 EG02 EG03 FA01 FF01 F01 FF01 FC01 FL01 GA01 GA10 GB01 GC01 GD01 GE01 HH01 HH03 HH05 HH07 HH09 HH11 HH13 HH15 HH17 HH20 JJ01 JJ03 JJ05 JJ07 JJ10 KK01 KK03 KK05 KK07 KK10 MM24 NN26 NN34
Claims (1)
％、Ａｌ2 Ｏ3 １〜５％、Ｎａ2 Ｏ ３〜１３％、Ｋ
2 Ｏ ２〜１０％、Ｌｉ2 Ｏ ０〜５％、ＣａＯ ０〜
５％、ＭｇＯ ０〜５％、ＳｒＯ １〜１２％、ＢａＯ
０〜３．８％の組成を有し、Ｎａ2 Ｏ／Ｋ2 Ｏ≧１、
（ＣａＯ＋ＭｇＯ＋ＳｒＯ＋ＢａＯ）／（Ｎａ2 Ｏ＋Ｋ
2 Ｏ＋Ｌｉ2 Ｏ）≧０．８５であり、本質的にＢ2 Ｏ3
を含有しないことを特徴とする電灯用ガラス組成物。1. The composition according to claim 1, wherein the weight percentage of SiO 2 is from 60 to 75.
%, Al 2 O 3 1~5% , Na 2 O 3~13%, K
2 O 2-10%, Li 2 O 0-5%, CaO 0
5%, MgO 0-5%, SrO 1-12%, BaO
It has a composition of 0 to 3.8%, and Na 2 O / K 2 O ≧ 1,
(CaO + MgO + SrO + BaO) / (Na 2 O + K
2 O + Li 2 O) ≧ 0.85 and essentially B 2 O 3
A glass composition for an electric light, characterized by not containing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20758599A JP3928307B2 (en) | 1999-07-22 | 1999-07-22 | Glass composition for electric lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20758599A JP3928307B2 (en) | 1999-07-22 | 1999-07-22 | Glass composition for electric lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001031442A true JP2001031442A (en) | 2001-02-06 |
| JP3928307B2 JP3928307B2 (en) | 2007-06-13 |
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ID=16542211
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|---|---|---|---|
| JP20758599A Expired - Fee Related JP3928307B2 (en) | 1999-07-22 | 1999-07-22 | Glass composition for electric lamp |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002308644A (en) * | 2001-04-04 | 2002-10-23 | Nippon Electric Glass Co Ltd | Glass for electric lamp |
| JP2003040641A (en) * | 2001-07-26 | 2003-02-13 | Asahi Glass Co Ltd | Mixed raw material for glass |
| JP2004244256A (en) * | 2003-02-13 | 2004-09-02 | Nippon Electric Glass Co Ltd | Lighting glass |
| WO2005066990A2 (en) * | 2004-01-05 | 2005-07-21 | Schott Ag | Use of glass ceramics |
| JP2009067676A (en) * | 2008-12-18 | 2009-04-02 | Nippon Electric Glass Co Ltd | Lighting glass |
| JP2013518021A (en) * | 2010-01-29 | 2013-05-20 | ショット アクチエンゲゼルシャフト | Photocell with substrate glass made from aluminosilicate glass |
| WO2015088006A1 (en) * | 2013-12-13 | 2015-06-18 | 旭硝子株式会社 | Glass for chemical strengthening and chemically strengthened glass |
-
1999
- 1999-07-22 JP JP20758599A patent/JP3928307B2/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4756430B2 (en) * | 2001-04-04 | 2011-08-24 | 日本電気硝子株式会社 | Glass for electric lamp and manufacturing method thereof |
| JP2002308644A (en) * | 2001-04-04 | 2002-10-23 | Nippon Electric Glass Co Ltd | Glass for electric lamp |
| JP2003040641A (en) * | 2001-07-26 | 2003-02-13 | Asahi Glass Co Ltd | Mixed raw material for glass |
| JP2004244256A (en) * | 2003-02-13 | 2004-09-02 | Nippon Electric Glass Co Ltd | Lighting glass |
| WO2005066990A2 (en) * | 2004-01-05 | 2005-07-21 | Schott Ag | Use of glass ceramics |
| WO2005066990A3 (en) * | 2004-01-05 | 2005-09-29 | Schott Ag | Use of glass ceramics |
| JP2009067676A (en) * | 2008-12-18 | 2009-04-02 | Nippon Electric Glass Co Ltd | Lighting glass |
| JP2013518021A (en) * | 2010-01-29 | 2013-05-20 | ショット アクチエンゲゼルシャフト | Photocell with substrate glass made from aluminosilicate glass |
| US9023745B2 (en) | 2010-01-29 | 2015-05-05 | Schott Ag | Photovoltaic cell having a substrate glass made of aluminosilicate glass |
| WO2015088006A1 (en) * | 2013-12-13 | 2015-06-18 | 旭硝子株式会社 | Glass for chemical strengthening and chemically strengthened glass |
| CN105813995A (en) * | 2013-12-13 | 2016-07-27 | 旭硝子株式会社 | Glass for chemical strengthening and chemically strengthened glass |
| JPWO2015088006A1 (en) * | 2013-12-13 | 2017-03-16 | 旭硝子株式会社 | Chemically strengthened glass and chemically strengthened glass |
| CN107663012A (en) * | 2013-12-13 | 2018-02-06 | 旭硝子株式会社 | It is chemical enhanced with glass and having carried out the glass of chemical intensification treatment |
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| Publication number | Publication date |
|---|---|
| JP3928307B2 (en) | 2007-06-13 |
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