TA Instruments TMA 2940 CE, Operator'S Manual, Page: 109 / 178

TA I
NSTRUMENTS
TMA 2940 CE 4–21
( )
Dilatometer Accessory
Description
The dilatometer accessory kit can be used to
determine the volume coefficient of expansion.
The cubic expansion of a sample is calculated
using the following equation:
K • (S – B)
β
=
V
where:
β
= coefficient of expansion
m 3
m
3 o
C
K = vial constant (cm 3 /µm)
S = slope (
µ
m/ o C)
V = sample volume (cm
3
). This
volume may be obtained by
dividing the sample mass in
grams by its density in g/cm 3 at
room temperature.
B = slope of baseline (
µ
m/
o
C).
Dilatometer Accessory