Negative thermal expansion material BNFO

JMTC’s negative thermal expansion material BNFO is an oxide ceramic with a perovskite structure consisting of bismuth, nickel and iron.

It shows a large negative thermal expansion coefficient of -187 ppm/K near room temperature and can be used to reduce CTE (coefficient of thermal expansion) in resin composite materials.

It is expected to be mainly used as a filler with negative thermal expansion.