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| 公司介紹 |
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Main composition:
1) SiO2: 80±0.5%
2) B2O3: 13±0.2%
3) Al2O3: 2.4±0.2%
4) Na2O(+K2O): 4.3±0.2%
Chemical properties:
1) Coefficient of mean linear thermal expansion (20°C/300°C): 3.3±0.1 (10-6K-1)
2) Transformation temperature: 525±15°C
3) Working point: 1,260±20°C
4) Softening point: 820±10°C
5) Density at 20°C: 2.23g/cm²
Chemical properties
6) Hydrolytic resistance at 98°C: ISO719-HGB1
7) Hydrolytic resistance at 121°C: ISO720-HGA1
8) Acid resistance class: ISO1776-1
9) Alkali resistance class: ISO695-A2
Out-of-roundness
Out-of-roundness of tubes, rods is related to outside diameter. |
| 相關產品 |
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boro glass tube, pink tube, green tube, purple tube, black tube, white tube, blue tube, amber tube |
| 公司基本資料 |
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| 公司名稱: |
huailai golden glass co ltd |
| 連絡: |
聯絡我們
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| 網址: |
********
********
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| 電話: |
86-10-84829094 |
| 傳真: |
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| 國家: |
中國 |
| 住址: |
tianchangyuan,chaoyang distri,beijing |
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