CONTROL OF THE GAS CONTENT AND TEMPERATURE OF FOAMING OF GLASS IN THE PRODUCTION OF GLASS FIBEI K.V. Nagulevich, Yu. I. Kolesov UDC666.19921 and m.s. aslanova It is known that the gases dissolved in glass behave in different ways on reheating [1, 2]. It is as sumed that the presence in the glass of water, sulfur dioxide, and carbon dioxide may facilitate foaming of the glass while oxygen and nitrogen are retained in the glass on heating up to higher temperature [1, 3] According to the latest ideas, H2O, SO2, and O2 are found in glass as complex gas ions of dissolved salts or as ions directly bonded to the silicon-oxygen framework of the glass [4],i. e, their solubility in glass is due to the chemical interaction with the glass and obeys the law of mass action. It has been established that their physical solubility in glass is insignificant. On the other hand the solubility of nitrogen and the inert gases obeys the solution laws and depends mainly on the fining temperature of the glass batch and on the partial pressure. The dissolution of carbon dioxide depends to a great extent on chemical interaction with the components of the glass and on the physical conditions of the solution gas,The essence of the foaming phenomena [5] in the reheating of glass consists of the fact that the complex ions, OH",so?, and CO3 are bonded in the glass and with a change in the external conditions(second Fig 1. The dependence of the gas content of glass on the amount of sodium sulfate batch:1)total gas content; 2)foaming temperature; 3)carbon dioxide; 4) water; 5) Fig. 2. The dependence of the gas content of glass on the amount of sodium sulfate and 0.3% ar senic trioxide added to the batch (legend as in Fig. 1) All-Union Scientific-Research Institute of Glass Plastics and Glass Fiber, Translated from Stekle i Keramika, No 11, pp 23-27, November, 1970 0 1971 Consultants Bureau, a division of Plenum Publishing Corporation, 227 West 17th Street, New york, N. Y. 10011. Al rights reserved. This article cannot be reproduced for any purpose whatsoever without permission of the publis her. A copy of this article is available from the publisher for $ 15.00CONTROL OF THE GAS CONTENT AND TEMPERATURE OF FOAMING OF GLASS IN THE PRODUCTION OF GLASS K.V. Nagulevich, Yu. I. Kolesov, and M.S. Aslanova FIBER UDC 666.199.211 It is known that the gases dissolved in glass behave in different ways on reheating [1, 2]. It is as￾sumed that the presence in the glass of water, sulfur dioxide, and carbon dioxide may facilitate foaming of the glass while oxygen and nitrogen are retained in the glass on heating up to higher temperature [1, 3]. According to the latest ideas, H20 , SO2, and 02 are found in glass as complex gas ions of dissolved salts or as ions directly bonded to the silicon-oxygen framework of the glass [4], i.e., their solubility in glass is due to the chemical interaction with the glass and obeys the law of mass action. It has been established that their physical solubility in glass is insignificant. On the other hand the solubility of nitrogen and the inert gases obeys the solution laws and depends mainly on the fining temperature of the glass batch and on the partial pressure. The dissolution of carbon dioxide depends to a great extent on chemical interaction with the components of the glass and on the physical conditions of the solution. The essence of the foaming phenomena [5] in the reheating of glass consists of the fact that the complex gas ions, OH-, SO 2", and CO 2- are bonded in the glass and with a change in the external conditions (second t, foam, Vgas/Vbatch' ~ t, foam, Vgas/Vbatch, nzo ,~oo~ I deg,,zo _ ,ooo t 3OO ~300 b ~ t300 r {280- ~300 f260 t200 | l t260 - 1200 ( t200 r [ r - /#00 r goO I 1r H60 HSO ~ 900 tt#O 800 [ H48 - 800 HE0 7001 tr /tOO HOO ~ 7O0 r 60el tOaO - ~00 fO60 fO$O - 1040 f#'~O- 500 t020 ~Ot- 1020 - 400 1000 - /ON 300 980 9O0- 300 g20 r 920 - IO'a ''- v Q 0.o gz ~ o,e 0,a bo Na20, % o,o o,2 0,r o,e o,o ~,o NazO, % Fig. 1 Fig. 2 Fig. 1. The dependence of the gas content of glass on the amount of sodium sulfate added to the batch: 1) total gas content; 2) foaming temperature; 3) carbon dioxide; 4) water; 5) sulfur di￾oxide; 6) oxygen. Fig. 2. The dependence of the gas content of glass on the amount of sodium sulfate and 0.3% ar￾senic trioxide added to the batch (legend as in Fig. 1). All-Union Scientific-Research Institute of Glass Plastics and Glass Fiber. Translated from Steklo i Keramika, No. 11, pp.23-27, November, 1970. O 1971 Consultants Bureau, a division of Plenum Publishing Corporation, 227 West 17th Street, New York, N. Y. 10011. All rights reserved. This article cannot be reproduced for any purpose whatsoever without permission of the publisher. A copy of this article is available from the publisher for $15.00. 666