发明名称 |
Acoustic vibrating element of graphite and method of manufacturing same |
摘要 |
An acoustic vibrating element, such a domed speaker diaphragm A or a phonographic pickup cantilever B, is formed by vapor deposition on an easily separable mold member 5 of tantalum or tantalum alloy when a mixture of a hydrocarbon gas and an inert gas is passed through a furnace heated to a temperature of 1150 DEG C.-1250 DEG C. at a flow rate in excess of 200 cm/min. The c-axis crystalline orientation of the resulting graphite element is substantially perpendicular to its surface, which provides a Young's modulus above 16,000 Kg/cm2.
|
申请公布号 |
US4395814(A) |
申请公布日期 |
1983.08.02 |
申请号 |
US19810315564 |
申请日期 |
1981.10.27 |
申请人 |
PIONEER ELECTRONIC CORPORATION |
发明人 |
TSUKAGOSHI, TSUNEHIRO;TOHMA, TERUO;YOKOZEKI, SHINICHI |
分类号 |
G11B3/50;H04R1/18;H04R7/02;H04R7/12;(IPC1-7):H04R31/00 |
主分类号 |
G11B3/50 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|