Product Description
The watch industry was historically the first application field for artificial corun-dum crystals. As far back as 1704, Debraute and Fatio, mathematicians from Geneva, proposed to use gems in watch mechanisms, but this idea was economi-cally unfeasible at that time. As soon as ruby had been put into industrial produc-tion, the well-known Swiss watch companies “Breget,” “Denis Blondel,” and “Luis Odemar” took an interest in it, since this material – with its reasonable cost, stable quality, hardness, and wear resistance – turned out to be suitable for friction pairs. The coefficient of dry friction of a “ruby–steel” pair is 0.25 at a pressure on the order of 3.7 GPa. The coefficient of friction of artificial ruby on steel is lower and more stable in comparison with that of the natural stone.
Table 1 Size of substrates
|
|
2 inches Substrates |
4 inches Substrates |
6 inches Substrates |
|
Diameter (mm) |
50.9±0.1 |
100.1±0.1 |
150.1±0.1 |
|
Primary Flat Length (mm) |
16±1 |
31±1 |
47.5±1 |
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ShanXiZhongJuJingKe Semiconductor Co., Ltd
Contact Person: yang
Phone：86-0354-3051057
Fax：
Address: No.2, machinery park, huitong industrial park, jinzhong development zone, shanxi demonstration zone,Jinzhong,Shanxi
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