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.
SEM images of WPVC composites containing (a) 20 pph wood particles, (b) 40 pph wood particles, (c) 50 pph Bi2O3 and 20 pph wood particles, (d) 50 pph Bi2O3 and 40 pph wood particles, (e) 100 pph Bi2O3 and 20 pph wood particles, and (f) 100 pph Bi2O3 and 40 pph wood particles.
