An official website of the United States government
Here's how you know
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.
Fig. 6. The linear shrinkage of the aerogels synthesized by various Z/R ratios during the CO2 supercritical drying and the carbonization process. The M/R ratio is kept constant as 40.