Thermal Analysis & Rheology
THERMAL APPLICATIONS NOTE
Sapphire Specific Heat Capacity Literature Values
Specific heat capacity measurements by DSC require the use of a well-characterized reference material (usually sapphire)
to obtain results. The table below summarizes specific heat capacity data (literature values) for sapphire as a function of
temperature. These values can be used in the required calculations.
Temperature
o
C
K
-183.15
-173.15
-163.15
-153.15
-143.15
-133.15
-123.15
-113.15
-103.15
-93.15
-83.15
-73.15
-63.15
-53.15
-43.15
-33.15
-23.15
-13.15
-3.15
0.00
6.85
16.85
26.85
36.85
46.85
56.85
66.85
76.85
86.85
96.85
106.85
116.85
90
100
110
120
130
140
150
170
170
180
190
200
210
220
230
240
250
260
270
273.15
280
290
300
310
320
330
340
350
360
370
380
390
Specific Heat
J/goC
0.0949
0.1261
0.1603
0.1968
0.2349
0.2739
0.3134
0.3526
0.3913
0.4291
0.4659
0.5014
0.5356
0.5684
0.5996
0.6294
0.6579
0.6848
0.7103
0.7180
0.7343
0.7572
0.7788
0.7994
0.8188
0.8373
0.8548
0.8713
0.8871
0.9020
0.9161
0.9296
Temperature
o
C
K
126.85
136.85
146.85
156.85
166.85
176.85
186.85
196.85
206.85
216.85
226.85
236.85
246.85
256.85
266.85
276.85
286.85
296.85
306.85
316.85
326.85
336.85
346.85
356.85
366.85
376.85
386.85
396.85
406.85
416.85
426.85
446.85
400
410
420
430
440
450
460
470
480
490
500
510
520
530
540
550
560
570
580
590
600
610
620
630
640
650
660
670
680
690
700
720
Specific Heat
J/goC
0.9423
0.9545
0.9660
0.9770
0.9875
0.9975
1.0070
1.0161
1.0247
1.0330
1.0409
1.0484
1.0557
1.0627
1.0692
1.0756
1.0817
1.0876
1.0932
1.0987
1.1038
1.1089
1.1137
1.1183
1.1228
1.1271
1.1313
1.1353
1.1393
1.1431
1.1467
1.1538
TN-8
Temperature
o
C
466.85
486.85
506.85
526.85
546.85
566.85
586.85
606.85
626.85
646.85
666.85
686.85
706.85
726.85
746.85
766.85
786.85
K
740
760
780
800
820
840
860
880
900
920
940
960
980
1000
1020
1040
1060
Specific Heat
J/goC
1.1604
1.1667
1.1726
1.1783
1.1837
1.1888
1.1937
1.1985
1.2030
1.2074
1.2117
1.2159
1.2198
1.2237
1.2275
1.2312
1.2348
Temperature
o
C
806.85
826.85
846.85
866.85
886.85
906.85
926.85
976.85
1026.85
1076.85
1126.85
1176.85
1226.85
1276.85
1326.85
1376.85
K
1080
1100
1120
1140
1160
1180
1200
1250
1300
1350
1400
1450
1500
1550
1600
1650
Specific Heat
J/goC
1.2383
1.2417
1.2451
1.2484
1.2516
1.2548
1.2578
1.2653
1.2724
1.2792
1.2856
1.2917
1.2975
1.3028
1.3079
1.3128
Table taken from D. A. Ditmars, et. al., J. Res. Nat. Bur. Stand., 87, (2), 159-163 (1982).
The values in the table were determined by Ginnings and Furukawa of the National Bureau of Standards on aluminum
oxide in the form of synthetic sapphire (corundum). The sapphire pieces passed a #10 sieve but were retained by a
#40 sieve, and had 99.98 to 99.99 % purity by weight. Heat capacity values below the experimental range were obtained
by extrapolation of the Debye equation fitted to the experimental value at the lowest temperature. The units J/gmole are absolute joules per degree per gram mole (molecular weight - 101.9613) at a constant pressure of 1 atmosphere
(100 Pa).
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TN-8A
Therm al A nalysis & Rheology
A S U BS IDIARY OF W ATE R S C OR PORATION