Table 2.
Parameters of HCSs before and after carbonization: Shell density and volume fraction of porosity.
| Name | Times of Carbonization | Shell Density (g/cm3) | Volume Fraction of Porosity (%) |
|---|---|---|---|
| / | 0 | 1.394 | 8.0 |
| HCS-I | 1 | 1.133 | 36.3 |
| HCS-II | 4 | 1.503 | 15.6 |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.