JPH0193437A - Low expanding glass - Google Patents
Low expanding glassInfo
- Publication number
- JPH0193437A JPH0193437A JP25109787A JP25109787A JPH0193437A JP H0193437 A JPH0193437 A JP H0193437A JP 25109787 A JP25109787 A JP 25109787A JP 25109787 A JP25109787 A JP 25109787A JP H0193437 A JPH0193437 A JP H0193437A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- na2o
- li2o
- chemical durability
- al2o3
- 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
- 239000011521 glass Substances 0.000 title claims abstract description 45
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract description 17
- 229910000272 alkali metal oxide Inorganic materials 0.000 abstract description 17
- 239000000126 substance Substances 0.000 abstract description 17
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 abstract description 14
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 abstract description 14
- 229910011255 B2O3 Inorganic materials 0.000 abstract description 9
- 238000006124 Pilkington process Methods 0.000 abstract description 7
- 239000000203 mixture Substances 0.000 abstract description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052593 corundum Inorganic materials 0.000 abstract description 5
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract description 5
- NOTVAPJNGZMVSD-UHFFFAOYSA-N potassium monoxide Inorganic materials [K]O[K] NOTVAPJNGZMVSD-UHFFFAOYSA-N 0.000 abstract 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 4
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Inorganic materials [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 abstract 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract 2
- 229910052681 coesite Inorganic materials 0.000 abstract 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract 2
- 239000000377 silicon dioxide Substances 0.000 abstract 2
- 235000012239 silicon dioxide Nutrition 0.000 abstract 2
- 229910052682 stishovite Inorganic materials 0.000 abstract 2
- 229910052905 tridymite Inorganic materials 0.000 abstract 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 10
- 239000002994 raw material Substances 0.000 description 8
- 239000005357 flat glass Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000002253 acid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 239000005340 laminated glass Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- MGADZUXDNSDTHW-UHFFFAOYSA-N 2H-pyran Chemical compound C1OC=CC=C1 MGADZUXDNSDTHW-UHFFFAOYSA-N 0.000 description 1
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 229910017344 Fe2 O3 Inorganic materials 0.000 description 1
- 229910011763 Li2 O Inorganic materials 0.000 description 1
- -1 N1CLCoO Substances 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910002637 Pr6O11 Inorganic materials 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001339 alkali metal compounds Chemical class 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 239000008395 clarifying agent Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- PLDDOISOJJCEMH-UHFFFAOYSA-N neodymium oxide Inorganic materials [O-2].[O-2].[O-2].[Nd+3].[Nd+3] PLDDOISOJJCEMH-UHFFFAOYSA-N 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 239000005297 pyrex Substances 0.000 description 1
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
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
- C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は低膨張ガラス、特にフロート法で成形しうる低
膨張ガラスに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a low expansion glass, and particularly to a low expansion glass that can be formed by a float method.
建築用板ガラスを高層ビルの窓ガラスとして用いる場合
は、防火性能が要求される。そのため従来は網入りの層
板ガラスが主として用いられていた。網入り層板ガラス
はその網のために、フロート法による透明ガラスとくら
べて透禎性がわるくビルの外観をそこなうが、これに代
る防火用板ガラスがないため、やむを得ず用いられてき
た。When architectural plate glass is used as window glass for high-rise buildings, fire-retardant performance is required. Therefore, in the past, wired laminated glass was mainly used. Because of the mesh, wired laminated glass has poor transparency compared to transparent glass made by the float method and spoils the appearance of buildings, but since there is no alternative fireproof glass, it has been used out of necessity.
最近ドイツ連邦共和国のシッット社がｐＹＲＡＮの商品
名で防火用の網入りでない板ガラスを発売したが、板ガ
ラスの厚味ムラが大きく、透視像、反射像の歪が大きく
、ビルの外観をそこなうことは、網入り磨き板ガラスの
場合とかわらなかった。これはＰＹＲＡＭが、粘性の高
い、いわゆるパイレックス組成であるため、フロート法
による成形が困錠なことによる。Recently, Schitt GmbH in the Federal Republic of Germany has released a non-wired plate glass for fire protection under the trade name pYRAN, but the thickness of the plate glass is highly uneven, the perspective image and reflected image are greatly distorted, and it does not spoil the exterior of the building. , was no different from the case of wired polished plate glass. This is because PYRAM has a high viscosity, so-called Pyrex composition, which makes it difficult to mold by the float method.
本発明はフロート法によって成形しうる低膨張ガラスを
提供することを課題とする。先に発明者らは、比較的低
温度で溶融成形できる低膨張ガラスを発明したが（特公
昭！／−弘６ｊλ３）、これらのガラスは、フロート法
による建築用低膨張ガラスとしては、化学的耐久性に劣
ること、原料コストが高いことなどの問題点があった。An object of the present invention is to provide a low expansion glass that can be formed by a float method. Previously, the inventors invented low-expansion glasses that can be melted and formed at relatively low temperatures (Tokukosho!/-Hiro6jλ3), but these glasses were not suitable for use as low-expansion glasses for architectural use using the float method. There were problems such as poor durability and high raw material costs.
本発明はこのような不都合を解決することを目的とする
。The present invention aims to solve such inconveniences.
本発明の要旨は、重量％で表示して本質的に下記組成
Ｓｉｏ２ ７３．ｏ〜７７．０％Ｂ２Ｏ３／ｌ
、０〜２０．０％
Ａ１２０３２０．２〜ダ、０％
ＭｇＯＯへｏ、ｔ％
（３ａＯＯ−Ｏ，Ｇ％
ＢａＯＯ−％−２％
ｚｎｏ ｏん７％
ＬｉｇＯｏ、 ｚ〜ｉ、ｔ％
Ｎａ２ｏＯ〜７．０％
に２０ ０．ｊ−弘、！襲
Ｌｉ２Ｏ＋Ｎａ２Ｏ＋ Ｋ２ＯＪ、１４．０％但しＬｉ
２Ｏ，Ｎａ２Ｏ，に２０をｍ０１％で表示シタ時Ｒ２０
＝ Ｌｉ２Ｏ＋ Ｎａ２Ｏ＋ Ｋ２ＯとしてＯ，コア≦
Ｌｉ２Ｏ／ＲｚＯ≦Ｏ０≠≠Ｏ≦Ｎａ２Ｏ／Ｒ２０≦０
．３３
０、／）≦に２０／Ｒ−２０≦０．！３であり、以上の
合計が全体の１３以上であることを特徴とする低膨張ガ
ラスである。The gist of the invention consists essentially of the following composition, expressed in weight percent: Sio2 73. o~77.0%B2O3/l
, 0~20.0% A120320.2~da, 0% MgOO o, t% (3aOO-O, G% BaOO-%-2% zno on7% LigOo, z~i, t% Na2oO~7 .0% to 20 0.j-Hiro, !Attack Li2O+Na2O+ K2OJ, 14.0%However, Li
2O, Na2O, displays 20 at m01% R20
= Li2O+ Na2O+ O as K2O, core≦
Li2O/RzO≦O0≠≠O≦Na2O/R20≦0
．． 33 0, /)≦20/R-20≦0. ! 3, and the total of the above is 13 or more as a whole, which is a low expansion glass.
本発明の組成限定理由は次の通りである。 The reasons for limiting the composition of the present invention are as follows.
５ｉ０２Ｇ；！ Ｂ２Ｏ３，Ａｌ２Ｏ３（！： 共Ｋ
ｎ ラス（１’）骨格ヲ形成する。５ｉ０２が７３．０
％未満では熱膨張係数が大きくなりすぎる。７７．０％
をこえるとガラスの溶解性が低下し、粘度が増大する。5i02G;! B2O3, Al2O3 (!: Both K
n lath (1') skeleton is formed. 5i02 is 73.0
If it is less than %, the coefficient of thermal expansion becomes too large. 77.0%
If the temperature exceeds 100%, the solubility of the glass decreases and the viscosity increases.
Ｂ２Ｏ３は熱膨張係数を大きくすることなく、高温での
ガラスの粘度を低下させる効果がある。B2O3 has the effect of lowering the viscosity of glass at high temperatures without increasing the coefficient of thermal expansion.
Ｂ２Ｏ３がｉｔ、ｏ％未満では、ガラスの粘度が増大す
る。Ｂ２Ｏ３が２０．０％をこえると化学的耐久性が低
下すると同時に、Ｂ２Ｏ３の原料は高価であるので原料
費が増大して好ましくない。When B2O3 is less than it, o%, the viscosity of the glass increases. If the B2O3 content exceeds 20.0%, the chemical durability will decrease and at the same time, the raw material cost of B2O3 will increase because the raw material for B2O3 is expensive, which is not preferable.
Ａｌ２Ｏ３はガラスの化学的耐久性を向上させる。Al2O3 improves the chemical durability of the glass.
Ａｌ２Ｏ３が２．２％未満では、ガラスの化学的耐久性
が低下する。≠、０％をこえるとガラスの粘度が増大す
るとともに、溶解性が低下する。When Al2O3 is less than 2.2%, the chemical durability of the glass decreases. ≠, when it exceeds 0%, the viscosity of the glass increases and the solubility decreases.
ＭｇＯｔ ＣａＯ＊ ＢａＯ＋ ＺｎＯは必ｆｉｔ分子
はないが、溶解性の向上、化学的耐久性の向上のために
、必要に応じて用いることができる。但しこれらの成分
は熱膨張係数を大きくするので、その上限はＭｇＯ。Although MgOtCaO*BaO+ZnO is not an essential molecule, it can be used as necessary to improve solubility and chemical durability. However, since these components increase the coefficient of thermal expansion, the upper limit is MgO.
ＣａＯはｏ、ｔ％、ＢａＯは−２％ 、ＺｎＱ は７％
とする。CaO is o, t%, BaO is -2%, ZnQ is 7%
shall be.
又これら二価金属酸化物の合計は２％をこえないことが
好ましい。Further, it is preferable that the total amount of these divalent metal oxides does not exceed 2%.
Ｌｉ２Ｏはガラスの高温での粘度を下げ、溶解性を増大
する好ましい成分である。Ｌ１２０が０．ｊ％未満では
前述の効果がなく、ｉ、ｔ％をこえると効果の増大がな
く原料費が増加する。Li2O is a preferred component that reduces the high temperature viscosity and increases the solubility of the glass. L120 is 0. If it is less than j%, the above-mentioned effect will not be obtained, and if it exceeds i,t%, the effect will not increase and the raw material cost will increase.
Ｎａ２Ｏは必須成分ではない。３．０％をこえるとガラ
スの化学的耐久性が低下するので３．０％を上限とする
。Na2O is not an essential component. If it exceeds 3.0%, the chemical durability of the glass decreases, so the upper limit is set at 3.0%.
Ｋ２ＯはＬｉ２Ｏ，Ｎａ２Ｏとの組合せにより化学的耐
久性を向上させる。Ｋ２ＯがＯ０！％未満ではガラスの
化学的耐久性が低下する。１１．１％をこえるとガラス
の粘度が増大するとともに熱膨張係数も大きくなり好ま
しくない。K2O improves chemical durability in combination with Li2O and Na2O. K2O is O0! If it is less than %, the chemical durability of the glass will decrease. If it exceeds 11.1%, the viscosity of the glass increases and the coefficient of thermal expansion also increases, which is not preferable.
Ｌｉ２Ｏ＋Ｎａ２Ｏ，に２０の合計が３．ｊ％未満テハ
、カラスの溶解性が低下し、ｔ、ｏ％をこえると熱膨張
係数が大きくなる。The sum of 20 in Li2O+Na2O is 3. If the temperature is less than j%, the solubility of glass will decrease, and if it exceeds t or o%, the coefficient of thermal expansion will increase.
カラスノ化学的耐久性は、Ｌｉ２Ｏ、Ｎａ２Ｏ＋ Ｋ２
０比率によってきまる。特にフロート法によって成形す
る時は、ガラスの分相が生じやすく、化学的耐久性、特
に耐酸性を低下させるのでアルカリ金属醸化物の比率が
重要である。Karasuno chemical durability is Li2O, Na2O + K2
Depends on the 0 ratio. Particularly when forming by the float method, phase separation of the glass is likely to occur, reducing chemical durability, especially acid resistance, so the ratio of alkali metal compound is important.
基礎ガラス組成がモル％で表示して５ｉ０２７Ａ、４＜
Ｊ％ｚＢ２０３ ＃、コＯ％、ＡＪ２０３ ／、ｊａ％
、 ＣａＯ０，３μ％、Ｒ２０ｊ、１０％であるガラス
のＬ工２０゜Ｎａ２Ｏ、に２０の比率をかえた時の耐水
性を第１図に耐酸性を第２図に示す。The basic glass composition expressed in mol% is 5i027A, 4<
J%zB203 #, KO%, AJ203 /, ja%
Figure 1 shows the water resistance and Figure 2 shows the acid resistance when the ratio of 20 to 20% of the glass is 0.3μ% CaO, 10% R20j, and 20% Na2O.
これらの図から明らかであるが、Ｌｘ２０．Ｎａ２Ｏ。As is clear from these figures, Lx20. Na2O.
Ｋ２Ｏはこれらをモル％“で表示した時、Ｒ２０−Ｌｉ
２Ｏ＋ Ｎａ２Ｏ＋ Ｋ２Ｏとして、０．２７≦Ｌｉ２
Ｏ／Ｒ２０≦Ｏ，グ弘Ｏ≦Ｎａ２Ｏ／ Ｒ２０≦０．３
３
ｏ、ｉｒ≦に２０／ Ｒ２０≦０．１３をみだすことが
必要である。When K2O is expressed as mol%, R20-Li
2O+ Na2O+ K2O, 0.27≦Li2
O/R20≦O, GuhiroO≦Na2O/R20≦0.3
3 It is necessary to satisfy 20/R20≦0.13 in o, ir≦.
Ｌｉ２Ｏ／ Ｒ２０が０．２７未満では、化学的耐久性
が低下し、Ｏ０ｊμをこえても化学的耐久性の向上はな
く、原料費が増大する。When Li2O/R20 is less than 0.27, the chemical durability decreases, and even if it exceeds O0jμ, there is no improvement in the chemical durability, and the raw material cost increases.
Ｎａ２ｏ、／ Ｒ２０が０．３３をこえると化学的耐久
性が低下する。Ｒ２０の中では原料費が最も安いので化
学的耐久性を低下させない範囲でＮａ２Ｑ ／ Ｒ２０
は、大きい方が望ましい。When Na2o/R20 exceeds 0.33, chemical durability decreases. The raw material cost is the lowest among R20, so Na2Q/R20 can be used as long as it does not reduce chemical durability.
is preferably larger.
Ｋ２Ｏ／ Ｒ２０が０．１１未満では、化学的耐久性が
低下し、Ｏ０！３をこえても化学的耐久性の向上はなく
、ガラスの粘度の増大、原料費の増大をもたらす。When K2O/R20 is less than 0.11, the chemical durability decreases, and even if it exceeds O0!3, there is no improvement in chemical durability, resulting in an increase in the viscosity of the glass and an increase in raw material cost.
以上の成分の他に本発明の主旨をそこなわない範囲で清
澄剤（例えばＡＳ２０３＋５ｂ２０３＋ＳＯ３＊Ｃ４＋
Ｆ等）、着色剤（例えばＮ１ＣＬＣｏＯ，Ｓｅ、ＭｎＯ
２，（３ｒ２０３＋Ｎｄ２Ｏ３＋Ｐｒ６Ｏ１１等）、紫
外線、赤外線吸収剤（Ｔｉ０２ 、 ＣｅＯ２、Ｆｅ２
Ｏ３等）や不純物（ＴｉＯ２，Ｆｅ２Ｏ３等）を含んで
もかまわない。In addition to the above components, a clarifying agent (for example, AS203+5b203+SO3*C4+
F, etc.), colorants (e.g. N1CLCoO, Se, MnO
2, (3r203+Nd2O3+Pr6O11 etc.), ultraviolet and infrared absorbers (Ti02, CeO2, Fe2
O3, etc.) or impurities (TiO2, Fe2O3, etc.) may be included.
後の実施例からもわかるように、本発明による低膨脹ガ
ラスは、ｊＱ０〜３００″′Ｃの平均熱膨張係数をｕＯ
ｘｌｏ −７ｃｍ／ａｍ ’（：以下になしうる。ガラ
スのヤング率をＥ （Ｋｔ／ｃｄ） 、ポアソン比をν
、熱膨張係数をα（ｃｍ ／ Ｃｍ ’Ｃ） 、板ガラ
スが加熱、或いは冷却される時のガラス表面とガラスの
厚味方向の中心部との温度差をΔＴ（”Ｃ）とすると、
ガラスの表面に発生する応力はσ−Ｅ・α・ΔＴ／（／
−ν）で示される。従って熱膨張係数の小さなことは、
防火用ガラスにとって必須の条件であり、本発明はその
要請に応えうる。As can be seen from the later examples, the low expansion glass according to the present invention has an average thermal expansion coefficient of jQ0~300''C of uO
xlo -7cm/am'
, the coefficient of thermal expansion is α (cm / Cm 'C), and the temperature difference between the glass surface and the center in the thickness direction of the glass when the plate glass is heated or cooled is ΔT (''C),
The stress generated on the glass surface is σ−E・α・ΔT/(/
−ν). Therefore, a small coefficient of thermal expansion means that
This is an essential condition for fire protection glass, and the present invention can meet that need.
又ガラスの粘度をη（ボイス）で示した時１０ｆｌη−
弘の温度な／２０グＣ以下にしうる。ｌｏｇη−１０の
温度は７０グＣ以下にしうる。このことは、本発明によ
る低膨脹ガラスが現在使用されている７０−ト法の成形
設備に特別な改造をほどこすことなく、フロート成形で
きることを意味している。Also, when the viscosity of glass is expressed as η (voice), it is 10flη-
The temperature can be lowered to below 20gC. The temperature of log η-10 can be less than 70 gC. This means that the low expansion glass according to the present invention can be float molded without special modifications to the currently used 70-t process molding equipment.
尚第１図の耐水性は、ＪＩＳＲ−３！０２の方法で溶出
させたＬｉ ｌ Ｎａ ｌ Ｋを炎光法で定量し、Ｌｉ
ｔＫをＮａ当量に換算してその合計を算出して図示した
ものである。第２図の耐酸性はＪＩＳＲ−３ｉｏ２の方
法でＲ２０の代りに０．０ＩＮのＨＮＯ３を使用して溶
出試験をした結果である。The water resistance shown in Figure 1 was determined by quantifying Li Na l K eluted using the method of JISR-3!02 using the flame method.
tK is converted into Na equivalent and the sum thereof is calculated and illustrated. The acid resistance shown in FIG. 2 is the result of an elution test using 0.0 IN HNO3 instead of R20 according to the JISR-3io2 method.
第１表 実施例
× ＪＩＳＲ−Ｊ！０２に準じる。溶出資はＮａ換算の
アルカリ金属＊＊ ｔｏ”ｃ 〜３ｏｏ℃の平均ｏ
Ｘ ／ ０− ？ ｃｔａ／ａｍ ”（分析法、表示の
仕方は耐水性の場合と同じである。Table 1 Example x JISR-J! According to 02. The molten metal is an alkali metal in terms of Na** to”c ~3oo℃ average o
X/0-? cta/am” (Analysis method and display method are the same as for water resistance.
第１表の組成となるようなガラス原料を製合し、容量約
コｓｏｍｅのりθＰｔ−ｌ０Ｒｈルツボに投入して電気
炉中で１ｊｒｏ℃４Ｉｈｒの溶解を行なった。溶解した
ガラスを予熱したステンレス鉄板枠に流しだした後、ｔ
ｚｏ℃に保持された電気炉に７５分間保持し、その後電
源を切ってゆっくりと降温しガラスを徐冷した。ガラス
を分割切断して測定用試料とした。比較例に用いたガラ
ス試料も同様にして得たが、ステンレス鉄板枠から電気
炉にガラスを移す時、ガラスが十分高温の状態で操作し
ているので十分に徐冷されている。第１表から明らかな
如く、本発明による低膨脹ガラスは、溶解性もよく、化
学的耐久性にすぐれ、７０−ト法による成形が可能であ
る。Glass raw materials having the compositions shown in Table 1 were prepared, put into a θPt-10Rh crucible with a capacity of about some, and melted in an electric furnace for 1 hour and 4 hours. After pouring the molten glass into a preheated stainless steel plate frame,
The glass was kept in an electric furnace kept at zo° C. for 75 minutes, and then the power was turned off and the temperature was slowly lowered to slowly cool the glass. The glass was cut into pieces and used as measurement samples. The glass sample used in the comparative example was obtained in the same manner, but since the glass was operated at a sufficiently high temperature when it was transferred from the stainless steel plate frame to the electric furnace, it was sufficiently slowly cooled. As is clear from Table 1, the low expansion glass according to the present invention has good solubility, excellent chemical durability, and can be molded by the 70-t method.
本発明による低膨脹ガラスは、化学的耐久性にいる板ガ
ラスとして好適である。The low expansion glass according to the invention is suitable as a chemically durable sheet glass.
第１図はアルカリ金属酸化物の含有割合による耐水性を
示すグラフ、第２図はアルカリ金属酸化物の含有割合に
よる耐酸性を示すグラフである。
第１図
ｉｚＯFIG. 1 is a graph showing water resistance depending on the content ratio of alkali metal oxide, and FIG. 2 is a graph showing acid resistance depending on the content ratio of alkali metal oxide. Figure 1 izO
Claims (1)
３１６．０〜２０．０％、Ａｌ＿２Ｏ＿３２．２〜４．
０％、ＭｇＯ０〜０．６％、ＣａＯ０〜０．６％、Ｂａ
Ｏ０〜２％、ＺｎＯ０〜１％、Ｌｉ＿２Ｏ０．５〜１．
５％、Ｎａ＿２Ｏ０〜３．０％、Ｋ＿２Ｏ０．５〜４．
５％、Ｌｉ＿２Ｏ＋Ｎａ＿２Ｏ＋Ｋ＿２Ｏ３．５〜６．
０％但し、Ｌｉ＿２Ｏ、Ｎａ＿２Ｏ、Ｋ＿２Ｏをｍｏｌ
％で表示した時Ｒ＿２Ｏ＝Ｌｉ＿２Ｏ＋Ｎａ＿２Ｏ＋Ｋ
＿２Ｏとして、０．２７≦Ｌｉ＿２Ｏ／Ｒ＿２Ｏ≦０．
４４０≦Ｎａ＿２Ｏ／Ｒ＿２Ｏ≦０．３３、０．１８≦
Ｋ＿２Ｏ／Ｒ＿２Ｏ≦０．５３であり、以上の成分が全
体の９８％以上であることを特徴とする低膨脹ガラス。SiO_273.0-77.0%, B_2O_ in weight%
316.0-20.0%, Al_2O_32.2-4.
0%, MgO0-0.6%, CaO0-0.6%, Ba
O0-2%, ZnO0-1%, Li_2O0.5-1.
5%, Na_2O0-3.0%, K_2O0.5-4.
5%, Li_2O+Na_2O+K_2O3.5-6.
0% However, Li_2O, Na_2O, K_2O are mol
When expressed in % R_2O=Li_2O+Na_2O+K
As _2O, 0.27≦Li_2O/R_2O≦0.
440≦Na_2O/R_2O≦0.33, 0.18≦
A low expansion glass characterized in that K_2O/R_2O≦0.53, and the above components account for 98% or more of the total.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25109787A JPH0193437A (en) | 1987-10-05 | 1987-10-05 | Low expanding glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25109787A JPH0193437A (en) | 1987-10-05 | 1987-10-05 | Low expanding glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0193437A true JPH0193437A (en) | 1989-04-12 |
| JPH0561214B2 JPH0561214B2 (en) | 1993-09-03 |
Family
ID=17217601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25109787A Granted JPH0193437A (en) | 1987-10-05 | 1987-10-05 | Low expanding glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0193437A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014524880A (en) * | 2011-07-12 | 2014-09-25 | オウェンス コーニング インテレクチュアル キャピタル リミテッド ライアビリティ カンパニー | Fiber manufacturing system and method with improved thermal performance |
| DE102014119594A1 (en) | 2014-12-23 | 2016-06-23 | Schott Ag | Borosilicate glass with low brittleness and high intrinsic strength, its preparation and its use |
| CN110078370A (en) * | 2019-04-19 | 2019-08-02 | 嘉兴市光泰照明有限公司 | A kind of high strength glass for undercarriage aeronautical light |
| US10855310B2 (en) | 2008-07-30 | 2020-12-01 | Micro Motion, Inc. | Data translation system and method comprising an optocoupler transmission system with a controller to determine transmission communication between devices |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5146523A (en) * | 1974-08-21 | 1976-04-21 | United Technologies Corp | |
| JPS59121136A (en) * | 1982-12-27 | 1984-07-13 | Natl Inst For Res In Inorg Mater | Glass composition having low expansion |
-
1987
- 1987-10-05 JP JP25109787A patent/JPH0193437A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5146523A (en) * | 1974-08-21 | 1976-04-21 | United Technologies Corp | |
| JPS59121136A (en) * | 1982-12-27 | 1984-07-13 | Natl Inst For Res In Inorg Mater | Glass composition having low expansion |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10855310B2 (en) | 2008-07-30 | 2020-12-01 | Micro Motion, Inc. | Data translation system and method comprising an optocoupler transmission system with a controller to determine transmission communication between devices |
| JP2014524880A (en) * | 2011-07-12 | 2014-09-25 | オウェンス コーニング インテレクチュアル キャピタル リミテッド ライアビリティ カンパニー | Fiber manufacturing system and method with improved thermal performance |
| DE102014119594A1 (en) | 2014-12-23 | 2016-06-23 | Schott Ag | Borosilicate glass with low brittleness and high intrinsic strength, its preparation and its use |
| CN110078370A (en) * | 2019-04-19 | 2019-08-02 | 嘉兴市光泰照明有限公司 | A kind of high strength glass for undercarriage aeronautical light |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0561214B2 (en) | 1993-09-03 |
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