УДК: 666.1.036.2

Drawing of quartz capillary tubes using a high-temperature furnace with an azimuthally nonuniform temperature field and employing a negative pressure in the tube blank

Makovetskiy, A.A., Zamyatin, A.A., Ivanov, G.A.

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Маковецкий А.А., Замятин А.А., Иванов Г.А. Вытяжка кварцевых капилляров с использованием высокотемпературной печи с азимутально-неоднородным температурным полем и разрежения внутри трубы-заготовки // Оптический журнал. 2016. Т. 83. № 1. С. 25–31.

Makovetskiy A.A., Zamyatin A.A., Ivanov G.A. Drawing of quartz capillary tubes using a high-temperature furnace with an azimuthally nonuniform temperature field and employing a negative pressure in the tube blank [in Russian] // Opticheskii Zhurnal. 2016. V. 83. № 1. P. 25–31.

For citation (Journal of Optical Technology):

A. A. Makovetskiĭ, A. A. Zamyatin, and G. A. Ivanov, "Drawing of quartz capillary tubes using a high-temperature furnace with an azimuthally nonuniform temperature field and employing a negative pressure in the tube blank," Journal of Optical Technology. 83(1), 18-22 (2016). https://doi.org/10.1364/JOT.83.000018

Abstract:

We have performed an experimental study of the effect of (a) azimuthal inhomogeneity in the temperature field in a high-temperature furnace and (b) negative pressure inside the tube blank on the cross-sectional shape of a quartz capillary tube. Quartz tubes with cross-sectional dimensions of 20/16 mm/mm were used as tube blanks. The furnace temperature field had two orthogonal axes of symmetry marking the maximum and minimum heating applied to the tube blank. When drawing capillary tubes, the difference between the maximum and minimum values of the operating temperature near the heating-element wall was 60–80°C, and the pressure differential between the interior pressure and atmospheric pressure was 0–300 Pa. The temperature of the heating element and the pressure inside the tube blanks were adjusted to produce sample capillary tubes with interior ellipticities of 1.0–4.0 with mean relative diameters (inside to outside) of 0.7–0.05.

Keywords:

drawing of quartz capillary, high-temperature furnace, azimuthally nonuniform temperature field, negative pressure inside the tube blank, elliptical capillary

OCIS codes: 220.0220

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