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Flame Technique for High Temperature Single Crystal Weissenberg Photography (1000-3000°C)

Published online by Cambridge University Press:  06 March 2019

M. A. Viswamitra  and
K. Jayalakshmi
M. A. Viswamitra
Affiliation:
Department of Physics, Indian Institute of Science Bangalore 12, India
K. Jayalakshmi
Affiliation:
Department of Physics, Indian Institute of Science Bangalore 12, India
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Abstract

Oxy-acetylene flame heating has been employed with an ordinary Nonius Weissenberg camera for high-temperature single-crystal studies over the the range 1000-3000°C. The regulator blow pipe is mounted horizontally on the camera track and one end of the experimental crystal (1 cm long) is heated by the vertical flame issuing out of a 0.5 mm bore nozzle* A long slot cut at the top of the film-cassette allows the flame to escape out without touching the X-ray film. The film-cassette consists of two split-halves hinged on one side so that it can be opened and slipped over the screen tubes. This arrangement avoids the necessity for removing the flame each time a new film is mounted on the camera. The goniometer arcs can be positioned during high-temperature exposures, and there is no need to water-cool the cassette up to the highest temperature. The device has been used to take photographs of MgO single crystals at 2100°C. It permits a ready application to diffractometers based on Weissenberg geometry.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 15: Twentieth Annual Conference on Applications of X-ray Analysis, August 11-13, 1971 , 1971 , pp. 548 - 555
Copyright
Copyright © International Centre for Diffraction Data 1971

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References

1. Gubser, R. A., Hoffmann, W. and Nissen, H. U., “Röntgenaufnahmen mit der Buergerschen Präzessionskamera bei Temperaturen zwischen 1000°C und 2000°c,” Zeit. Krist. 119, S.264–272 (1963).Google Scholar
2. Viswamitra, M. A., Jayalakshmi, K. and Kalyani, V., “A miniature furnace suitable for X-ray Weissenberg Photography up to 1000°C”, J. Appl. Cryst. 3, 227–229 (1970).Google Scholar
3. Viswamitra, M. A. and Jayalakshmi, K., “A simple miniature furnace for routine collection of intensity data on the Hilger & Watts Y190 linear diffractometer”, J. Phys. E : Sci. Instrum. 3, 656–657, (1970).Google Scholar