Properties of Crystalline Silicon

Chapter 4: Thermal Properties

(Edited by M.R. Brozel)

4.1 Specific Heats of c-Si and Molten Si

H.-M. Kagaya and T. Soma (updated by M.R. Brozel)
April 1998

A SPECIFIC HEAT OF c-Si

Data relevant to the specific heat at constant pressure (c p) of Si are given in [1 6]. Recommended data are summarised in TABLE 1 together with the Debye temperature ( ?).

Table 1: Specific heat and Debye temperature data.

T

(K)

c p

(J g -1 K -1)

?

(K)

5

0.340 10 -4

641

10

0.276 10 -3

631

20

0.341 10 -2

545

40

0.441 10 -1

463

60

0.115

492

80

0.188

535

100

0.259

572

120

0.328

599

140

0.395

617

160

0.456

629

180

0.511

637

200

0.557

643

220

0.597

647

240

0.632

648

260

0.665

647

280

0.691

645

300

0.713

643

400

0.785

650

500

0.832

653

600

0.849

654

700

0.866

800

0.883

655

900

0.899

1000

0.916

656

1100

0.933

1200

0.950

1300

0.967

1400

0.983

1500

1.000

1600

1.017

Notes (O: observed, Th: theoretical and E: extrapolated)

  1. Extrapolation of the specific heat to the melting point (1687 K) gives 1.032 J g -1 K -1 (E).

  2. The Debye temperature extrapolated to T = 0 K gives 645 K and reaches about 657 K at the melting point (E).

  3. The Debye temperature has a minimum value of 463 K at T = 39 K...

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