SG10201403649WA - Alkali-free glass for magnetic recording medium and glass substrate for magnetic recording medium using same - Google Patents
Alkali-free glass for magnetic recording medium and glass substrate for magnetic recording medium using sameInfo
- Publication number
- SG10201403649WA SG10201403649WA SG10201403649WA SG10201403649WA SG10201403649WA SG 10201403649W A SG10201403649W A SG 10201403649WA SG 10201403649W A SG10201403649W A SG 10201403649WA SG 10201403649W A SG10201403649W A SG 10201403649WA SG 10201403649W A SG10201403649W A SG 10201403649WA
- Authority
- SG
- Singapore
- Prior art keywords
- recording medium
- magnetic recording
- alkali
- mgo
- free glass
- Prior art date
Links
Landscapes
- Magnetic Record Carriers (AREA)
- Glass Compositions (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
OF THE DISCLOSURE ALKALI-FREE GLASS FOR MAGNETIC RECORDING MEDIUM AND GLASS SUBSTRATE FOR MAGNETIC RECORDING MEDIUM USING SAME 5 The present invention provides an alkali-free glass for a magnetic recording medium which has high specific elastic modulus, a high Young's modulus, a high glass transition point, high chemical durability, low density, and high strength, and in which float forming is easily performed. The present invention relates to an alkali-free glass 10 for a magnetic recording medium, having a Young's modulus of 87 GPa or more, and including in terms of mass% on the basis of oxides: 61 to 68.5 of S1O2; 17 to 23.5 of A1 0 ; 2 3 6.5 to 15 of MgO; and 3 to 13 of CaO, in which the contents of MgO and CaO satisfy the following relationship: 0.42 MgO/(MgO < + CaO) < 0.68. No Suitable Figure 31
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013134880 | 2013-06-27 | ||
| JP2014126447A JP6308044B2 (en) | 2013-06-27 | 2014-06-19 | Alkali-free glass for magnetic recording media and glass substrate for magnetic recording media using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SG10201403649WA true SG10201403649WA (en) | 2015-01-29 |
Family
ID=52492445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SG10201403649WA SG10201403649WA (en) | 2013-06-27 | 2014-06-26 | Alkali-free glass for magnetic recording medium and glass substrate for magnetic recording medium using same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6308044B2 (en) |
| SG (1) | SG10201403649WA (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI768502B (en) | 2015-04-03 | 2022-06-21 | 日商日本電氣硝子股份有限公司 | Glass |
| JP6020754B1 (en) * | 2015-12-25 | 2016-11-02 | 旭硝子株式会社 | Glass substrate for magnetic recording medium, magnetic recording medium |
| JP7056558B2 (en) * | 2016-05-25 | 2022-04-19 | Ａｇｃ株式会社 | Glass for data storage medium substrate, glass substrate for data storage medium and magnetic disk |
| WO2017204224A1 (en) * | 2016-05-27 | 2017-11-30 | 旭硝子株式会社 | Glass for magnetic recording media, glass substrate for magnetic recording media, and magnetic disk |
| CN111836791B (en) * | 2018-03-14 | 2023-01-17 | Ａｇｃ株式会社 | Alkali-free glass |
| WO2022239741A1 (en) * | 2021-05-10 | 2022-11-17 | 日本電気硝子株式会社 | Alkali-free glass plate |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3804101B2 (en) * | 1995-04-27 | 2006-08-02 | 旭硝子株式会社 | Glass substrate for magnetic disk |
| JP2003016633A (en) * | 2001-06-28 | 2003-01-17 | Asahi Glass Co Ltd | Glass substrate for magnetic disk and method for manufacturing the same |
| JP4923556B2 (en) * | 2005-12-16 | 2012-04-25 | 日本電気硝子株式会社 | Glass substrate for information recording media |
| JP5008350B2 (en) * | 2006-07-05 | 2012-08-22 | 花王株式会社 | Polishing liquid composition for glass substrate |
| JP2008171472A (en) * | 2007-01-09 | 2008-07-24 | Fuji Electric Device Technology Co Ltd | Method of manufacturing glass substrate for information recording medium, method of manufacturing magnetic recording disk, and magnetic recording disk |
| KR101752033B1 (en) * | 2010-12-07 | 2017-06-28 | 아사히 가라스 가부시키가이샤 | Alkali free glass and method for producing alkali free glass |
-
2014
- 2014-06-19 JP JP2014126447A patent/JP6308044B2/en active Active
- 2014-06-26 SG SG10201403649WA patent/SG10201403649WA/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015028827A (en) | 2015-02-12 |
| JP6308044B2 (en) | 2018-04-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| SG10201403649WA (en) | Alkali-free glass for magnetic recording medium and glass substrate for magnetic recording medium using same | |
| MY166878A (en) | Glass for magnetic recording medium substrate and usage thereof | |
| MY176222A (en) | Glass for magnetic recording medium substrate and magnetic recording medium substrate | |
| SG10201403647PA (en) | Alkali-free glass for magnetic recording medium and glass substrate for magnetic recording medium using same | |
| MY150314A (en) | Glass for information recording medium substrate, glass substrate for information recording medium and magnetic disk | |
| AR083735A1 (en) | HIGH TRANSMITTANCE GLASS | |
| MY162039A (en) | Glass for substrate, and glass substrate | |
| MY159312A (en) | Glass fiber | |
| MY177073A (en) | Method for producing magnetic disk, and glass substrate for information recording medium | |
| RU2014117028A (en) | GLASS COMPOSITIONS WITH INCREASED CHEMICAL AND MECHANICAL RESISTANCE | |
| MY158507A (en) | Glass substrate for magnetic recording medium, magnetic recording medium, and glass substrate blank for magnetic recording medium | |
| MY156297A (en) | Glass for magnetic recording medium substrate, magnetic recording medium substrate and method of manufacturing the same, and magnetic recording medium | |
| MX366947B (en) | Alkaline earth alumino-silicate glass compositions with improved chemical and mechanical durability. | |
| MY172060A (en) | Ingestible event marker data framework | |
| SG152186A1 (en) | Glass for information recording media substrate, glass substrate for magnetic disk and magnetic disk | |
| MY152135A (en) | Glass for use in substrate for information recording medium, substrate for information recording medium and information recording medium, and their manufacturing method | |
| MY158989A (en) | Glass substrate for magnetic recording medium and its use | |
| SG171527A1 (en) | Glass substrate for information recording medium and magnetic disk | |
| SG10201403650TA (en) | Alkali-free glass for magnetic recording medium and glass substrate for magnetic recording medium using same | |
| SG10201403648QA (en) | Alkali-free glass for magnetic recording medium and glass substrate for magnetic recording medium using same | |
| WO2013046052A3 (en) | Inorganic fiber block | |
| MY188043A (en) | Glass substrate for information recording medium | |
| MY162801A (en) | Glass substrate for magnetic recording medium and magnetic recording medium | |
| WO2009032308A8 (en) | Sam-ii riboswitch and uses thereof | |
| TH130070A (en) | Glass substrate for magnetic recording medium, magnetic log medium, and empty glass substrate for magnetic recording medium. |