Glass plate structure, vibrating plate, opening member, and glass substrate for magnetic recording medium

A kind of glass plate, structure technology

Active Publication Date: 2020-09-22
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in general, the loss factor of these materials is as small as about 1 / 10 to about 1 / 100 compared with paper, so it is easy to leave unexpected reverberation sound
In addition, when excitation is performed at the natural frequency of the component, a resonance mode occurs, and a significant deterioration of the tone color may occur due to this

Method used

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  • Glass plate structure, vibrating plate, opening member, and glass substrate for magnetic recording medium
  • Glass plate structure, vibrating plate, opening member, and glass substrate for magnetic recording medium
  • Glass plate structure, vibrating plate, opening member, and glass substrate for magnetic recording medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0167] Prepare a glass plate 1 of 12 mm x 60 mm x 0.5 mm as a glass plate A, apply ion-exchanged water thereon as a liquid layer, and then adhere a glass plate 2 of 12 mm x 60 mm x 0.5 mm as a glass plate B to it, Thus, a glass plate structure of 12 mm x 60 mm x 1 mm was obtained. Compositions (% by mass) and physical property values ​​of the glass plate 1 and the glass plate 2 are shown below.

[0168] (glass plate 1) SiO 2 : 60%, Al 2 o 3 : 17%, B 2 o 3 : 8%, MgO: 3%, CaO: 4%, SrO: 8%, Density: 2.5g / cm 3 , Young's modulus: 77GPa, specific elastic modulus: 3.1×10 7 m 2 / s 2

[0169] (Glass plate 2) SiO 2 : 61.5%, Al 2 o 3 : 20%, B 2 o 3 : 1.5%, MgO: 5.5%, CaO: 4.5%, SrO: 7%, Density: 2.7g / cm 3 , Young's modulus: 85GPa, specific elastic modulus: 3.2×10 7 m 2 / s 2

Embodiment 2～12

[0171] A glass plate structure was obtained in the same manner as in Example 1 except that the liquid layer was changed. In addition, in Example 6, instead of the glass plate 2 of the glass plate B, the glass plate 1 was used.

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Abstract

A glass plate structure with a loss coefficient of 1×10 ‑2 above, and the longitudinal wave sound velocity value in the thickness direction is 5.5×10 3 m / s or more.

Description

technical field [0001] The present invention relates to a glass plate structure having good acoustic performance, and further relates to a vibration plate, an opening member, and a glass substrate for a magnetic recording medium using the glass plate structure. Background technique [0002] In general, drum paper (ko-so paper) or resin is used as a diaphragm for a speaker or a microphone. These materials have a large loss coefficient and are less likely to generate resonant vibrations, so the reproduction performance of sound in the audible range is good. [0003] However, since the sound velocity values ​​in these materials are all low, it is difficult for the vibration of the material to follow the frequency of the sound wave when excited at a high frequency, and it is easy to generate split vibration. Therefore, it is difficult to obtain a desired sound pressure especially in the high frequency range. [0004] In recent years, especially in the case of high-resolution s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R7/06C03C21/00C03C27/06G11B5/73
CPCC03C21/00C03C27/06H04R7/06B32B17/06B32B2255/20B32B2255/26B32B2307/10B32B2307/402B32B2307/412B32B2307/422B32B2307/72G11B5/73921B32B1/00G11B5/73B32B17/10B32B17/10009B32B17/10082B32B17/10137B32B17/10321B32B17/1044B32B7/12B32B11/04B32B27/281B32B27/30B32B2255/24B32B2429/00B32B2607/00C03C3/087H04R7/04H04R2307/023
Inventor 秋山顺
Owner ASAHI GLASS CO LTD
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