Title:
GLASS FOR MAGNETIC RECORDING MEDIUM SUBSTRATES, MAGNETIC RECORDING MEDIUM SUBSTRATE, MAGNETIC RECORDING MEDIUM, GLASS SPACER FOR MAGNETIC RECORDING/REPRODUCING DEVICES, AND MAGNETIC RECORDING/REPRODUCING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/015240
Kind Code:
A1
Abstract:
Provided is a glass for magnetic recording medium substrates, which comprises an amorphous glass having an SiO2 content of 54 to 62 mol% inclusive, an MgO content of 15 to 28 mol% inclusive, an Li2O content of 0.2 mol% or more and an Na2O content of 5 mol% or less.
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Inventors:
SATO KOICHI (JP)
HASHIMOTO KAZUAKI (JP)
HASHIMOTO KAZUAKI (JP)
Application Number:
PCT/JP2020/028450
Publication Date:
January 28, 2021
Filing Date:
July 22, 2020
Export Citation:
Assignee:
HOYA CORP (JP)
International Classes:
C03C3/078; C03C3/085; C03C3/087; G11B5/73; G11B5/84; G11B17/038; G11B23/00
Domestic Patent References:
| WO2018088563A1 | 2018-05-17 | |||
| WO2018225725A1 | 2018-12-13 |
Attorney, Agent or Firm:
SIKS & CO. (JP)
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