JPH0653592B2 - Manufacturing method of tempered glass - Google Patents
Manufacturing method of tempered glassInfo
- Publication number
- JPH0653592B2 JPH0653592B2 JP60031495A JP3149585A JPH0653592B2 JP H0653592 B2 JPH0653592 B2 JP H0653592B2 JP 60031495 A JP60031495 A JP 60031495A JP 3149585 A JP3149585 A JP 3149585A JP H0653592 B2 JPH0653592 B2 JP H0653592B2
- Authority
- JP
- Japan
- Prior art keywords
- glass
- cao
- tio
- mgo
- temperature
- 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 - Fee Related
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
- C03C3/087—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 containing calcium oxide, e.g. common sheet or container glass
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は強化ガラスの製造方法に関する。TECHNICAL FIELD The present invention relates to a method for producing tempered glass.
歪点以上の温度に加熱したガラスの表面を風冷等によつ
て急冷する強化ガラスの製造方法においては、例えば、
次の組成のガラスが使用されている。In the method for producing a tempered glass in which the surface of the glass heated to a temperature equal to or higher than the strain point is rapidly cooled by air cooling or the like, for example,
The following glass compositions are used.
重量％表示で、SiO2 72.6，Al2O3 1.8，CaO 8.0，MgO
4,0，Na2O 12.5，K2O 0.8その他0.3 又はSiO2 71.1，Al
2O3 1.6，CaO 9.0，MgO 3.8，Na2O 13.3，K2O 0.8 その
他0.4 である。かゝるガラスは、液相温度が前者1040
℃，後者1050℃であり、フロート法によつて素板を製造
できるので、品質の優れた素板が比較的低コストで得ら
れるという利点がある。In weight% display, SiO 2 72.6, Al 2 O 3 1.8, CaO 8.0, MgO
4,0, Na 2 O 12.5, K 2 O 0.8 Other 0.3 or SiO 2 71.1, Al
2 O 3 1.6, CaO 9.0, MgO 3.8, Na 2 O 13.3, K 2 O 0.8 and other 0.4. Such glass has a liquidus temperature of 1040
Since the base plate can be manufactured by the float method, there is an advantage that a base plate of excellent quality can be obtained at a relatively low cost.
しかしながら、かゝるガラスは風冷により熱的に強化す
る場合強化され難いという難点があり、板厚の薄い（例
えば3.5mm以下）ガラスを該方法によつて強化し自動車
用に適するような製造を得ることは実質的に困難であつ
た。However, such glass has a drawback that it is difficult to be tempered when it is thermally strengthened by air cooling, and a glass having a thin plate thickness (for example, 3.5 mm or less) is tempered by the method and manufactured to be suitable for automobiles. Was difficult to obtain.
本発明は上記難点を解決することを目的になされたもの
で、歪点以上の温度にあるガラスを急冷して、表層部と
中央部に温度差を形成し熱的に表層部に強い圧縮応力を
形成する強化ガラスの製造方法において、前記ガラスは
重量％表示で実質的に SiO2 63〜75 Ai2O3 1.5〜7 TiO2 ０〜６ TiO2+Al2O3 3〜7 CaO 5〜15 MgO 0〜10 CaO+MgO 6〜20 Na2O 8〜18 K2O 0〜5 Na2O+K2O 10〜20 からなり、該ガラスの液相温度が1150℃以下である強化
ガラスの製造方法を提供する。The present invention has been made for the purpose of solving the above problems, by rapidly cooling the glass at a temperature above the strain point, forming a temperature difference between the surface layer portion and the central portion and thermally compressing the surface layer portion strongly In the method for producing a tempered glass for forming a glass, the glass is substantially represented by weight% SiO 2 63 to 75 Ai 2 O 3 1.5 to 7 TiO 2 0 to 6 TiO 2 + Al 2 O 3 3 to 7 CaO 5 to 15 MgO 0-10 CaO + MgO 6-20 Na 2 O 8-18 K 2 O 0-5 Na 2 O + K 2 O 10-20, tempered glass having a liquidus temperature of 1150 ° C. or less A method for manufacturing the same is provided.
本発明においては特定のガラスが使用されるが、その限
定理由は次の通りである。Although a specific glass is used in the present invention, the reason for the limitation is as follows.
SiO2は、ガラスのネツトワークフオーマーであり、SiO2
＜63％では耐候性が悪く、SiO2＞75％ではガラスを溶融
成形する際に失透を生成し易くなるのでいずれも好まし
くない。SiO 2 is the net work Fuo mer glass, SiO 2
When it is <63%, the weather resistance is poor, and when SiO 2 > 75%, devitrification is likely to occur during melt molding of glass, which is not preferable.
Al2O3 は、ガラスの熱膨脹係数を大きくし強化し易くな
ること、耐候性を向上すること及び粘性を調節すること
のために1.5 ％以上添加される。しかしながら、Al2O3
＞７％ではガラスの溶解性が低下するので好ましくな
い。TiO2は必須成分ではないが、添加することによりAl
2O3 と同様ガラスを強化し易くする。しかし、TiO2＞６
％ではガラスが黄色に着色しクリヤーな強化ガラスが得
られ難く、また、ヤング率が高くなり強化の際破損を生
じ易くなるので好ましくない。TiO2は望ましくは４％以
下である。更にAl2O3 ＋TiO2＜1.5 ％では、風冷強化し
やすい特性が得られず耐候性も低下するため好ましくな
い。Al2O3 ＋TiO2＞11％ではヤング率が高すぎ強化時に
冷却割れを生じるため好ましくない。Al2O3 ＋TiO2は上
記範囲中３〜７％の範囲が特に望ましい。Al 2 O 3 is added in an amount of not less than 1.5% in order to increase the coefficient of thermal expansion of glass to facilitate strengthening, improve weather resistance and adjust viscosity. However, Al 2 O 3
When it is> 7%, the melting property of the glass decreases, which is not preferable. TiO 2 is not an essential component, but addition of Al
Like 2 O 3 , it makes glass easier to strengthen. However, TiO 2 > 6
%, The glass is colored yellow and it is difficult to obtain a clear tempered glass, and the Young's modulus becomes high, and breakage easily occurs during tempering, which is not preferable. TiO 2 is desirably 4% or less. Further, when Al 2 O 3 + TiO 2 <1.5%, it is not preferable because the property of easily tempering by wind cooling cannot be obtained and the weather resistance is also deteriorated. If Al 2 O 3 + TiO 2 > 11%, the Young's modulus is too high and cooling cracks occur during strengthening, which is not preferable. Al 2 O 3 + TiO 2 is particularly preferably in the range of 3 to 7% in the above range.
CaO，MgOはフラツクスとして、及び耐候性向上のため添
加され、さらにCaOはヤング率及び熱膨脹率を高めるた
め添加される。CaO and MgO are added as a flux and for improving weather resistance, and CaO is added for increasing Young's modulus and thermal expansion coefficient.
CaO＜５％，CaO＋MgO＜６％では耐候性が悪く、CaO＞15
％，MgO＞10％，CaO＋MgO＞20％では失透しやすい、さ
らにCaO＞15％では熱膨脹率、ヤング率が高すぎ風冷強
化時冷却割れを生じるため好ましくない。When CaO <5% or CaO + MgO <6%, the weather resistance is poor, and CaO> 15
%, MgO> 10%, CaO + MgO> 20%, devitrification is likely to occur, and further, if CaO> 15%, the thermal expansion coefficient and Young's modulus are too high, and cooling cracks occur during air-cooling, which is not preferable.
CaOは上記範囲中５〜９．５％の範囲がより望ましく、
また、CaO＋MgOは上記範囲中10〜15％の範囲がより望ま
しい。CaO is more preferably in the range of 5 to 9.5%,
Further, CaO + MgO is more preferably in the range of 10 to 15% in the above range.
Na2O，K2Oはフラツクスであり、Na2O＞18％及びNa2O＋K
2O＞20％では耐候性が悪く、Na2O＜８％，Na2O＋K2O＜1
0％では熔解性が悪い。K2O＞５％ではガラスの熔解温度
が上昇するのに加え、K2OはNa2Oに比して高価であるの
で不適当である。Na 2 O, K 2 O is a flux, Na 2 O> 18% and Na 2 O + K
When 2 O> 20%, the weather resistance is poor, and Na 2 O <8%, Na 2 O + K 2 O <1
At 0%, the meltability is poor. When K 2 O> 5%, the melting temperature of glass rises, and in addition, K 2 O is more expensive than Na 2 O, which is unsuitable.
Na2Oは上記範囲中10〜15の範囲がより望ましく、また、
Na2O＋K2Oは上記範囲中12.5〜20％の範囲がより望まし
い。More preferably, Na 2 O has a range of 10 to 15 in the above range, and
The range of 12.5 to 20% of Na 2 O + K 2 O is more preferable in the above range.
本発明によるガラスは以上の成分が総量で98％以上であ
ればよく、残部２％については他の成分、例えば、Fe2O
3，Se，Cr2O3，CoOを含有することができる。In the glass according to the present invention, the above components may be 98% or more in total, and the remaining 2% may be other components such as Fe 2 O.
3 , Se, Cr 2 O 3 , and CoO can be contained.
一方、かゝる組成範囲にあるものでも液相温度が1150℃
以上のガラスは、フロート成形が難かしく、品質に優れ
た素板ガラスが得られ難いので好ましくない。液相温度
は1100℃以下が特に望ましい。On the other hand, even if it is in such a composition range, the liquidus temperature is 1150 ° C.
The above glass is not preferable because it is difficult to form a float and it is difficult to obtain a raw glass plate having excellent quality. The liquidus temperature is particularly preferably 1100 ° C or lower.
また、上記組成及び液相温度の範囲にあるガラスの内、
熱膨張係数が90×10-7℃-1以上、ヤング率が7200Kg/mm2
以上のものは強化が入り易いので特に望ましい。Further, among the glass in the range of the above composition and liquidus temperature,
Thermal expansion coefficient 90 × 10 -7 ℃ -1 or more, Young's modulus 7200Kg / mm 2
The above are particularly desirable because they are easily strengthened.
上記ガラスを強化するに当つては、従来の熱的な強化方
法が使用される。即ち、歪点以上（通常は軟化点近傍）
の温度のガラスを表面より急冷し、表層部と中央部とに
大きな温度差を形成した状態で徐冷温度域（即ち、徐冷
点〜歪点の温度範囲）を通過することにより表層部に強
い圧縮応力を生成する。かゝるガラスの急冷に当つては
特に限定されるものではないが、ガラス表面に近接して
ノズルを配設し、該ノズルより風圧500〜1500mmAqの常
温で空気を吹付けることによつて達成される。冷却能を
向上させるためにミストを含有させること及び冷却空気
を使用することもできる。また、肉厚の薄い例えば 3.5
mm以下のガラスは強化の際変形し易いので平板状の製品
を得る場合は、一周縁をフツクによつて吊り下げ、ガラ
スを垂直に支持するのが好ましい。In strengthening the glass, conventional thermal strengthening methods are used. That is, above the strain point (usually near the softening point)
By rapidly cooling the glass of the temperature from the surface and passing through the slow cooling temperature range (that is, the temperature range of the slow cooling point to the strain point) in the state where a large temperature difference is formed between the surface layer portion and the central portion, the surface layer portion is formed. Generates strong compressive stress. The quenching of such glass is not particularly limited, but it is achieved by arranging a nozzle close to the glass surface and blowing air from the nozzle at room temperature with a wind pressure of 500 to 1500 mmAq. To be done. It is also possible to include a mist and to use cooling air to improve the cooling capacity. Also, the wall thickness is thin, for example 3.5
Since glass of mm or less is easily deformed during tempering, it is preferable to suspend one edge by a hook and vertically support the glass when obtaining a flat product.
尚、本発明に使用するガラスは、従来のフロートガラス
の製造設備を用いて製造することができ、製造技術面で
も特別なものは必要としない。The glass used in the present invention can be manufactured using conventional float glass manufacturing equipment, and no special manufacturing technology is required.
常法に従い、SiO2源とし珪砂、Al2O3源としてアルミナ
粉又は長石、CaO及びMgO源とし石灰石，苦灰石及び水酸
化マグネシウム、Na2O及びK2O源としソーダ灰，芒硝及
び長石、さらにTiO2源とし二酸化チタン粉を使用し、こ
れらを目的とするガラス組成に従つて調合した。次い
で、このバツチ５Kgを白金ルツボに入れ1450℃で５時間
熔融し、板状に成形し冷却後研磨することにより３mm厚
及び４mm厚の板ガラスを得た。これらのガラス組成につ
いては表１に記載すると共に、それらのガラスの液相温
度、熱膨脹係数、ヤング率を同表に併記した。なお、熱
膨脹率は20〜400℃の平均値であり、ヤング率は計算値
である。According to the usual method, silica sand as an SiO 2 source, alumina powder or feldspar as an Al 2 O 3 source, limestone, dolomite and magnesium hydroxide as a CaO and MgO source, soda ash, mirabilite as a Na 2 O and K 2 O source, and Feldspar and titanium dioxide powder as a TiO 2 source were used, and these were prepared according to the intended glass composition. Next, 5 kg of this batch was put into a platinum crucible and melted at 1450 ° C. for 5 hours, formed into a plate shape, cooled and polished to obtain a plate glass having a thickness of 3 mm and 4 mm. These glass compositions are shown in Table 1, and the liquidus temperature, thermal expansion coefficient and Young's modulus of those glasses are also shown in the same table. The coefficient of thermal expansion is an average value of 20 to 400 ° C, and the Young's modulus is a calculated value.
次いで、これらのガラスを表２に記載した寸法に切断し
た後、その一周縁をフツクにて吊り下げ、所定温度に加
熱した。次いで、ガラス表面に対向して配設したノズル
から室温の空気をガラス表面に吹付け強化した。かゝる
強化処理に使用したガラスの寸法、並びに加熱温度、ノ
ズル口径、ノズルピツチ、空気の吹出圧力等については
表２に併記した。Next, these glasses were cut into the dimensions shown in Table 2, one edge thereof was hung with a hook, and heated to a predetermined temperature. Then, room temperature air was blown to the glass surface from a nozzle arranged so as to face the glass surface for strengthening. The dimensions of the glass used for such tempering treatment, the heating temperature, the nozzle diameter, the nozzle pitch, and the air blowing pressure are also shown in Table 2.
なお、同表の強化処理条件ロは、周縁を支持した、いわ
ゆる自重曲げ強化法で行なつたものである。かくして強
化したガラスをヨーロッパ規格（Economic Commission
for Europe Regulation No.43のAnnex5）に従つて破砕
試験を行ない、最も破片数の少ない部位について５cm×
５cmに存在する破片数を測定した。その結果については
表１に併記した。なお、強化処理条件ロで行なつたもの
については表面残留応力も測定したので、その結果も同
表へ併記した。In addition, the strengthening treatment condition (b) in the table is a so-called self-weight bending strengthening method in which the peripheral edge is supported. The glass thus strengthened is compliant with European standards (Economic Commission).
Fracture test is conducted in accordance with Annex 5) of Europe Regulation No.43, and the area with the smallest number of fragments is 5 cm ×
The number of fragments present at 5 cm was measured. The results are also shown in Table 1. The surface residual stress was also measured for those subjected to the strengthening treatment condition (b), and the results are also shown in the table.
一方、比較例として本発明以外のガラスを使用し同様の
強化処理を行ない、同様の破砕試験を行なつた。その結
果についても表１に併記した。同表より明らかなように
本発明によれば強化が容易に行なえ、板厚のより薄いガ
ラスまで強化することができる。On the other hand, as a comparative example, a glass other than the present invention was used, the same strengthening treatment was performed, and the same crushing test was performed. The results are also shown in Table 1. As is apparent from the table, according to the present invention, tempering can be easily performed, and even glass having a thinner plate thickness can be tempered.
本発明によれば、化学強化法又は液冷強化法を使用しな
い限り困難とされていた板厚の薄い（３mm以下）ガラス
について風冷強化することができ、また、従来風冷強化
で実施していた板厚の厚いガラスについては冷却能を低
下することができるので設備費及び動力費を低下するこ
とができる。According to the present invention, it is possible to perform wind-cooling strengthening on a glass having a thin plate thickness (3 mm or less), which has been considered difficult unless a chemical strengthening method or a liquid cooling strengthening method is used. As for the glass having a large plate thickness, the cooling capacity can be lowered, so that the equipment cost and the power cost can be reduced.
Claims (2)
表層部と中央部に温度差を形成し熱的に表層部に強い圧
縮応力を形成する強化ガラスの製造方法において、前記
ガラスは重量％表示で実質的に SiO2 ６３〜７５ Al2O3 １．５〜 ７ TiO2 ０〜 ６ TiO2+ Al2O3 ３〜 ７ CaO ５〜１５ MaO ０〜１０ CaO+MgO ６〜２０ Na2O ８〜１８ K2O ０〜 ５ Na2O+K2O １０〜２０ からなり、該ガラスの液相温度が１１５０℃以下である
強化ガラスの製造方法。1. A glass at a temperature above the strain point is rapidly cooled,
In the method for producing a tempered glass in which a temperature difference is formed between the surface layer portion and the central portion and a strong compressive stress is thermally formed in the surface layer portion, the glass is substantially expressed as a weight percentage of SiO 2 63 to 75 Al 2 O 3 1. .5~ 7 TiO 2 0~ 6 TiO 2 + Al 2 O 3 3~ 7 CaO 5~15 MaO 0~10 CaO + MgO 6~20 Na 2 O 8~18 K 2 O 0~ 5 Na 2 O + K A method for producing a tempered glass comprising 2 O 10 to 20 and having a liquidus temperature of 1150 ° C. or lower.
特許請求の範囲第１項記載の製造方法。2. The glass is substantially SiO 2 63 to 75 Al 2 O 3 1.5 to 7 TiO 20 to 4 TiO 2 + Al 2 O 3 3 to 7 CaO 5 to 9. 5 MgO 0 to consist 8 CaO + MgO 10~15 Na 2 O 10~15 K 2 O 0~ 5 Na 2 O + K 2 O 12.5~20, the liquidus temperature of the glass is 1100 ° C. or less The manufacturing method according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60031495A JPH0653592B2 (en) | 1985-02-21 | 1985-02-21 | Manufacturing method of tempered glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60031495A JPH0653592B2 (en) | 1985-02-21 | 1985-02-21 | Manufacturing method of tempered glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61197444A JPS61197444A (en) | 1986-09-01 |
| JPH0653592B2 true JPH0653592B2 (en) | 1994-07-20 |
Family
ID=12332825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60031495A Expired - Fee Related JPH0653592B2 (en) | 1985-02-21 | 1985-02-21 | Manufacturing method of tempered glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0653592B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012073549A (en) * | 2010-09-30 | 2012-04-12 | Sanyo Electric Co Ltd | Optical panel device |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62246839A (en) * | 1986-04-17 | 1987-10-28 | Central Glass Co Ltd | Easily tempering glass composition |
| JP3831957B2 (en) * | 1994-09-14 | 2006-10-11 | 旭硝子株式会社 | Glass composition and substrate for plasma display |
| JPH09208246A (en) * | 1995-10-16 | 1997-08-12 | Central Glass Co Ltd | Fireproof glass |
| BR0013654B1 (en) * | 1999-09-01 | 2010-01-26 | thermally tempered glazing, laminated automotive glazing, and method for tempering a glass glazing. | |
| CA2356260A1 (en) | 1999-10-22 | 2001-04-26 | Nippon Sheet Glass Co., Ltd. | Glass panel and production method therefor |
| WO2001034531A1 (en) * | 1999-11-11 | 2001-05-17 | Nippon Sheet Glass Co., Ltd. | Flat glass to be tempered |
| US6858553B2 (en) * | 2000-10-03 | 2005-02-22 | Nippon Sheet Glass Co., Ltd. | Glass composition |
| EP1245545B1 (en) * | 2001-03-30 | 2011-08-10 | Asahi Glass Company Ltd. | Glass plate and method for tempering a glass plate |
| DE60301581T2 (en) | 2002-02-14 | 2006-06-22 | Noritsu Koki Co., Ltd. | A thermal fuser for sublimating and fixing sublimable ink on a recording medium |
| JP4397196B2 (en) * | 2002-09-04 | 2010-01-13 | セントラル硝子株式会社 | Thermally tempered glass and manufacturing method and apparatus thereof |
| CN101367619B (en) * | 2008-09-12 | 2011-10-05 | 江苏秀强玻璃工艺股份有限公司 | Manufacturing method of colorful crystal glass |
| GB201505091D0 (en) * | 2015-03-26 | 2015-05-06 | Pilkington Group Ltd | Glass |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5950045A (en) * | 1982-09-14 | 1984-03-22 | Asahi Glass Co Ltd | Glass absorbing heat rays and ultraviolet rays |
-
1985
- 1985-02-21 JP JP60031495A patent/JPH0653592B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012073549A (en) * | 2010-09-30 | 2012-04-12 | Sanyo Electric Co Ltd | Optical panel device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61197444A (en) | 1986-09-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI491571B (en) | Glass plate for display device, plate glass for display device and production process thereof | |
| JP6020455B2 (en) | Tempered glass plate | |
| CN101508524B (en) | Glass suitable for chemically tempering and chemical tempered glass | |
| JP7447942B2 (en) | tempered glass | |
| US3637453A (en) | Glass-ceramic articles having an integral compressive stress surface layer | |
| CN111995243A (en) | High-strength and low-brittleness aluminosilicate glass and strengthening method and application thereof | |
| JP5954316B2 (en) | Tempered glass plate | |
| CN110204195B (en) | Ultrathin glass and preparation method thereof | |
| EP1245545A1 (en) | Glass plate and method for tempering a glass plate | |
| JPWO2019230889A1 (en) | Tempered glass and tempered glass | |
| JPH0653592B2 (en) | Manufacturing method of tempered glass | |
| JP2015086080A (en) | Physically-strengthened glass, and production method thereof | |
| JP4951838B2 (en) | Tempered glass | |
| WO2015111524A1 (en) | Glass composition for tempering, tempered glass article and method for producing same | |
| JP4471075B2 (en) | Mineral glass that can be ceramicized, preparation of glass-ceramic products, and products | |
| JP2013249222A (en) | Chemically strengthened crystallized glass article and method for producing the same | |
| JP2006062929A (en) | Crystallized glass article and method for manufacturing the same | |
| JP2003508325A (en) | Reinforced glazing and modification of the glass for its use | |
| JP7136100B2 (en) | tempered glass | |
| JP7136101B2 (en) | tempered glass | |
| JP2001180967A (en) | Manufacturing method of glass composition | |
| EP0980341B1 (en) | Organic lens molds in inorganic glass and novel inorganic glasses | |
| JP2000351649A (en) | Glass for substrate and glass substrate | |
| CA2340412A1 (en) | Lead-free glasses | |
| CN116282909A (en) | High-alumina silicate glass, and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |