NPD nano-polycrystalline diamond
April25, 2025
The discovery of nano-polycrystalline diamond (NPD) began serendipitously in 1985 when a failed high-pressure experiment at the Australian National University yielded a mysterious transparent material. Initially overlooked, the researcher resumed the work in 1989 at Ehime University and successfully reproduced the transparent diamond in 1995 under extreme pressure (22 GPa) and temperature (2500 K). This material was confirmed to be polycrystalline diamond with a nano-scale grain structure.
From 2001 onward, collaboration between Ehime University’s Geodynamics Research Center (GRC) and Sumitomo Electric Industries (SEI) led to advancements in synthesizing larger, high-quality NPD samples. The material’s exceptional hardness, surpassing that of single crystal diamond, and its unique structure made it suitable for industrial and scientific applications. It was commercialized in 2011 and distributed globally through joint research efforts.
The first international symposium on NPD (NPSTD-2019) showcased its broad potential across various scientific disciplines. The proceedings were compiled into a special volume of High Pressure Research in 2020, coinciding with the retirement of the lead researcher who pioneered the field. The story highlights decades of persistence, innovation, and collaboration in advancing ultra-hard materials for cutting-edge science and technology.
Diasemi 's NPD products will be available in Q2,2025, we offer colledge/university/lab discount to encourage researching and trial production ,not only to domestic USA, but to the whole world, as always ,we think beyond ,offer unbound.
Diasemi USA
San Francisco 4/25/2025
