?? ??????????“????”
![](http://n.sinaimg.cn/front/270/w1080h1590/20190420/jiS7-hvvuiyn3280853.jpg)
????:1???????:???????
2???????
3?????300?????
4???????
5??????
???2??????????????13????? (???? ????????????)?????????????,?????????,??????????????,??,????????
?????????????????????????????????13????????????????????????
???1967????,???????????????“????????”???,?,????????,?????????????
??????????????,????????????????????????????????????,?????????????????????
??????????????????,?????????????????????????50GPa??????,???????????“??”???????????????????????,?????????????,???
??????????????????,?????,??
???????,??????,??????????155±9GPa,??????40%???????????????,????1100?,?????900??
???????????????????,??1.2???????????????,?????????????????????????,?????????????,???????,???(??????????????????????????) ????:????????????????????