公开(公告)号：US12030777B2

公开(公告)日：2024-07-09

申请号：US17535899

申请日：2021-11-26

Applicant: Jilin University

Inventor： Bingbing Liu ,  Mingguang Yao ,  Yuchen Shang ,  Zhaodong Liu ,  Jiajun Dong

IPC: C01B32/156

CPC classification number: C01B32/156 ,  C01P2002/02 ,  C01P2002/76 ,  C01P2004/60 ,  C01P2006/32 ,  C01P2006/40 ,  C01P2006/60 ,  C01P2006/80 ,  C01P2006/90

Abstract: The invention relates to a millimeter-sized bulk spa amorphous carbon material and a method of preparing the same, and the method comprises a step of performing a high-temperature and high-pressure (HTHP) treatment on C60 powder at a temperature of 450-1100° C., preferably 700-1000° C., more preferably 900-1000° C., and most preferably 1000° C., and a pressure of 20-37 GPa, preferably 20-30 GPa, and most preferably 27 GPa, so as to obtain the millimeter-sized bulk sp3 amorphous carbon material. The sp3 carbon content in the amorphous carbon material is adjustable by changing the temperature and pressure conditions, so that the sp3 content is greater than 80%, and the sp3 content of high-quality samples is close to 100%. The optical band gap and thermal conductivity of the series of amorphous carbon materials can be effectively adjusted. The obtained series of amorphous carbon materials have ultra-high hardnesses, high thermal conductivities, adjustable band gaps (1.90-2.79 eV) which exceed the ranges of the band gaps of amorphous silicon and germanium. As a result, a new space is opened up for the application of amorphous materials.