Abstract

An apparatus has been designed and constructed for measuring the coefficient of linear thermal expansion in the 30–250°C temperature range for samples as small as 13 mm in length and 6 mm in diameter. Similarities between this apparatus and one previously built for measurements from room temperature down to 10 K are reviewed; important modifications appropriate to the high temperature range are discussed in detail. Measurements were made at 25°C intervals on two infrared-transmitting optical materials: polycrystalline cadmium sulfide (Eastman Kodak Co.) and chalcogenide glass 20, composition Ge33Se55As12 (Texas Instruments, Inc.). Measurements were also made on a sample of Corning crown glass 8263; the results are compared with Corning data. Finally, it is shown that the thermal expansion coefficients determined with this high temperature apparatus are compatible with those obtained with the above-mentioned low temperature device.

© 1972 Optical Society of America

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References

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  1. J. F. Ebersole, J. S. Browder, S. S. Ballard, Bull. Am. Phys. Soc. 15, 1340A (1970).
  2. J. S. Browder, S. S. Ballard, Appl. Opt. 8, 793 (1969).
    [Crossref] [PubMed]
  3. R. K. Adams, E. G. Davisson, Smoothed Thermocouple Tables of Extended Significance (°C), ORNL Report 3649 (March, 1965), Vol. 2, Sec. 2.5.
  4. R. A. Kirby, T. A. Hahn, “Standard Reference Material 736, Copper—Thermal Expansion” (NBS Certificate of Analysis), Nov.19, 1969.
  5. J. S. Browder, S. S. Ballard, J. Opt. Soc. Am. 60, 1560A (1970).
  6. J. S. Browder, S. S. Ballard, Appl. Opt. 11, 841 (1972).
    [Crossref] [PubMed]
  7. J. F. Ebersole, J. S. Browder, S. S. Ballard, J. Opt. Soc. Am. 61, 1550A (1971).
  8. J. S. Browder, S. S. Ballard, J. Opt. Soc. Am. 61, 683A (1971).

1972 (1)

1971 (2)

J. F. Ebersole, J. S. Browder, S. S. Ballard, J. Opt. Soc. Am. 61, 1550A (1971).

J. S. Browder, S. S. Ballard, J. Opt. Soc. Am. 61, 683A (1971).

1970 (2)

J. F. Ebersole, J. S. Browder, S. S. Ballard, Bull. Am. Phys. Soc. 15, 1340A (1970).

J. S. Browder, S. S. Ballard, J. Opt. Soc. Am. 60, 1560A (1970).

1969 (1)

Adams, R. K.

R. K. Adams, E. G. Davisson, Smoothed Thermocouple Tables of Extended Significance (°C), ORNL Report 3649 (March, 1965), Vol. 2, Sec. 2.5.

Ballard, S. S.

J. S. Browder, S. S. Ballard, Appl. Opt. 11, 841 (1972).
[Crossref] [PubMed]

J. F. Ebersole, J. S. Browder, S. S. Ballard, J. Opt. Soc. Am. 61, 1550A (1971).

J. S. Browder, S. S. Ballard, J. Opt. Soc. Am. 61, 683A (1971).

J. S. Browder, S. S. Ballard, J. Opt. Soc. Am. 60, 1560A (1970).

J. F. Ebersole, J. S. Browder, S. S. Ballard, Bull. Am. Phys. Soc. 15, 1340A (1970).

J. S. Browder, S. S. Ballard, Appl. Opt. 8, 793 (1969).
[Crossref] [PubMed]

Browder, J. S.

J. S. Browder, S. S. Ballard, Appl. Opt. 11, 841 (1972).
[Crossref] [PubMed]

J. S. Browder, S. S. Ballard, J. Opt. Soc. Am. 61, 683A (1971).

J. F. Ebersole, J. S. Browder, S. S. Ballard, J. Opt. Soc. Am. 61, 1550A (1971).

J. F. Ebersole, J. S. Browder, S. S. Ballard, Bull. Am. Phys. Soc. 15, 1340A (1970).

J. S. Browder, S. S. Ballard, J. Opt. Soc. Am. 60, 1560A (1970).

J. S. Browder, S. S. Ballard, Appl. Opt. 8, 793 (1969).
[Crossref] [PubMed]

Davisson, E. G.

R. K. Adams, E. G. Davisson, Smoothed Thermocouple Tables of Extended Significance (°C), ORNL Report 3649 (March, 1965), Vol. 2, Sec. 2.5.

Ebersole, J. F.

J. F. Ebersole, J. S. Browder, S. S. Ballard, J. Opt. Soc. Am. 61, 1550A (1971).

J. F. Ebersole, J. S. Browder, S. S. Ballard, Bull. Am. Phys. Soc. 15, 1340A (1970).

Hahn, T. A.

R. A. Kirby, T. A. Hahn, “Standard Reference Material 736, Copper—Thermal Expansion” (NBS Certificate of Analysis), Nov.19, 1969.

Kirby, R. A.

R. A. Kirby, T. A. Hahn, “Standard Reference Material 736, Copper—Thermal Expansion” (NBS Certificate of Analysis), Nov.19, 1969.

Appl. Opt. (2)

Bull. Am. Phys. Soc. (1)

J. F. Ebersole, J. S. Browder, S. S. Ballard, Bull. Am. Phys. Soc. 15, 1340A (1970).

J. Opt. Soc. Am. (3)

J. S. Browder, S. S. Ballard, J. Opt. Soc. Am. 60, 1560A (1970).

J. F. Ebersole, J. S. Browder, S. S. Ballard, J. Opt. Soc. Am. 61, 1550A (1971).

J. S. Browder, S. S. Ballard, J. Opt. Soc. Am. 61, 683A (1971).

Other (2)

R. K. Adams, E. G. Davisson, Smoothed Thermocouple Tables of Extended Significance (°C), ORNL Report 3649 (March, 1965), Vol. 2, Sec. 2.5.

R. A. Kirby, T. A. Hahn, “Standard Reference Material 736, Copper—Thermal Expansion” (NBS Certificate of Analysis), Nov.19, 1969.

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Figures (6)

Fig. 1
Fig. 1

Housing of the expansion cell within the inner chamber. See text for explanation of symbols.

Fig. 2
Fig. 2

The middle chamber.

Fig. 3
Fig. 3

The outer chamber.

Fig. 4
Fig. 4

Plot of the cell calibration and of the coefficients of linear thermal expansion for four samples, from 30°C to 250°C. Open circles are values computed from Corning data.

Fig. 5
Fig. 5

Plot of the coefficient of linear thermal expansion of Kodak polycrystalline cadmium sulfide from 10 K to 525 K. The curve for the 10–300 K region is due to Browder and Ballard.5,6

Fig. 6
Fig. 6

Plot of the coefficient of linear thermal expansion of Texas Instruments glass 20 from 10 K to 525 K. The curves for the 10–300 K region are due to Browder and Ballard.5,6

Tables (1)

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Table I Coefficients of Linear Thermal Expansion for Three Optical Materials from 30°C to 250°C

Equations (2)

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α l ( T ) = [ 1 / l ( T ) ] [ d l ( T ) / d T ] ,
α l ( T av ) = α Cu ( T av ) P { [ Δ ( 1 / C ) / Δ T ] + [ α Cu ( T av ) / C av ] } + X Cu ( T av ) .

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