Study on the Comprehensive Properties and Microstructures of A3-3 Matrix Graphite Related to the High Temperature Purification Treatment
Table 6
Comparison of properties of MG treat with and without HTP.
Property
Average of MG without HTP
Deviation of MG without HTP
Average of MG with HTP
Deviation of MG with HTP
Specification
Bulk density (g·cm−3)
1.749
0.004
1.753
0.006
1.70–1.77
Crush strength (AX/TR) (kN)
19.86/17.98
0.78/0.35
23.78/20.26
0.32/0.57
⩾18.0
(AX/TR) (W·m−1K−1)
31.83/36.97
0.57/0.81
37.36/39.74
0.95/0.76
⩾25.0
CTE (AX/TR) (10−6K−1)
4.74/4.15
0.04/0.08
3.69/3.07
0.08/0.27
Null
Anisotropy
1.140
0.025
1.162
0.074
⩽1.3
(mg·cm−2h−1)
1.55
0.01
0.48
0.03
⩽1.3
Erosion rate (mg·h−1 per pebble)
14.23
0.227
2.41
0.028
⩽6.0
Qualified
Qualified
⩾50
Ash content (ppm)
31.70
2.12
15.15
0.35
⩽300
The value of thermal conductivity at 1000°C. 1000°C, 10 h; atmosphere is He + 1 vol% . Numbers of drops from a height of 4 m onto the matrix sphere bed before break.
