Initiation of ammonium perchlorate-Ignition by chromic oxidetitanium dioxide catalysts

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The effect of p-type chromic oxide and n-type titanium dioxide on the initiation of the explosion of ammonium perchlorate has been studied. On addition of chromic oxide the explosion temperature of ammonium perchlorate is decreased by about 160° to 180° C. In order to clarify the role of chromic oxide, the effect of its electronic properties on the explosion of ammonium perchlorate was studied. Experiments have shown that the defect electron concentration of chromic oxide is decisive. The electron conductor titanium dioxide proved in practice to be an ineffective substance, even when tungsten oxide, aluminium oxide and beryllium oxide were incorporated in titanium dioxide in order to alter the electron concentration. The explosion temperature was, however, decreased by about 150° C when titanium dioxide was doped with a small amount of chromic oxide. This was attributed to the formation of chromic ions of higher valency in the surface of titanium dioxide (defect conducting layer). The critical temperature for the explosion of ammonium perchlorate has been determined, in the presence of both substances, as well as the activation energy of the process which leads to the explosion. Values of activation energy agree with those corresponding to the electron transfer mechanism of decomposition of ammonium perchlorate, and experimental results have been interpreted in this sense.

Original languageEnglish
Pages (from-to)141-148
Number of pages8
JournalCombustion and Flame
Volume9
Issue number2
Publication statusPublished - Jun 1965

Fingerprint

ammonium perchlorates
dioxides
ignition
Explosions
Ignition
explosions
titanium oxides
Titanium dioxide
catalysts
Catalysts
Oxides
oxides
Electrons
Activation energy
beryllium oxides
activation energy
Beryllia
Defects
electrons
tungsten oxides

ASJC Scopus subject areas

  • Mechanical Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this

Initiation of ammonium perchlorate-Ignition by chromic oxidetitanium dioxide catalysts. / Solymosi, F.

In: Combustion and Flame, Vol. 9, No. 2, 06.1965, p. 141-148.

Research output: Contribution to journalArticle

@article{32a9f82282c8495cbdf1996328507a7d,
title = "Initiation of ammonium perchlorate-Ignition by chromic oxidetitanium dioxide catalysts",
abstract = "The effect of p-type chromic oxide and n-type titanium dioxide on the initiation of the explosion of ammonium perchlorate has been studied. On addition of chromic oxide the explosion temperature of ammonium perchlorate is decreased by about 160° to 180° C. In order to clarify the role of chromic oxide, the effect of its electronic properties on the explosion of ammonium perchlorate was studied. Experiments have shown that the defect electron concentration of chromic oxide is decisive. The electron conductor titanium dioxide proved in practice to be an ineffective substance, even when tungsten oxide, aluminium oxide and beryllium oxide were incorporated in titanium dioxide in order to alter the electron concentration. The explosion temperature was, however, decreased by about 150° C when titanium dioxide was doped with a small amount of chromic oxide. This was attributed to the formation of chromic ions of higher valency in the surface of titanium dioxide (defect conducting layer). The critical temperature for the explosion of ammonium perchlorate has been determined, in the presence of both substances, as well as the activation energy of the process which leads to the explosion. Values of activation energy agree with those corresponding to the electron transfer mechanism of decomposition of ammonium perchlorate, and experimental results have been interpreted in this sense.",
author = "F. Solymosi",
year = "1965",
month = "6",
language = "English",
volume = "9",
pages = "141--148",
journal = "Combustion and Flame",
issn = "0010-2180",
publisher = "Elsevier Inc.",
number = "2",

}

TY - JOUR

T1 - Initiation of ammonium perchlorate-Ignition by chromic oxidetitanium dioxide catalysts

AU - Solymosi, F.

PY - 1965/6

Y1 - 1965/6

N2 - The effect of p-type chromic oxide and n-type titanium dioxide on the initiation of the explosion of ammonium perchlorate has been studied. On addition of chromic oxide the explosion temperature of ammonium perchlorate is decreased by about 160° to 180° C. In order to clarify the role of chromic oxide, the effect of its electronic properties on the explosion of ammonium perchlorate was studied. Experiments have shown that the defect electron concentration of chromic oxide is decisive. The electron conductor titanium dioxide proved in practice to be an ineffective substance, even when tungsten oxide, aluminium oxide and beryllium oxide were incorporated in titanium dioxide in order to alter the electron concentration. The explosion temperature was, however, decreased by about 150° C when titanium dioxide was doped with a small amount of chromic oxide. This was attributed to the formation of chromic ions of higher valency in the surface of titanium dioxide (defect conducting layer). The critical temperature for the explosion of ammonium perchlorate has been determined, in the presence of both substances, as well as the activation energy of the process which leads to the explosion. Values of activation energy agree with those corresponding to the electron transfer mechanism of decomposition of ammonium perchlorate, and experimental results have been interpreted in this sense.

AB - The effect of p-type chromic oxide and n-type titanium dioxide on the initiation of the explosion of ammonium perchlorate has been studied. On addition of chromic oxide the explosion temperature of ammonium perchlorate is decreased by about 160° to 180° C. In order to clarify the role of chromic oxide, the effect of its electronic properties on the explosion of ammonium perchlorate was studied. Experiments have shown that the defect electron concentration of chromic oxide is decisive. The electron conductor titanium dioxide proved in practice to be an ineffective substance, even when tungsten oxide, aluminium oxide and beryllium oxide were incorporated in titanium dioxide in order to alter the electron concentration. The explosion temperature was, however, decreased by about 150° C when titanium dioxide was doped with a small amount of chromic oxide. This was attributed to the formation of chromic ions of higher valency in the surface of titanium dioxide (defect conducting layer). The critical temperature for the explosion of ammonium perchlorate has been determined, in the presence of both substances, as well as the activation energy of the process which leads to the explosion. Values of activation energy agree with those corresponding to the electron transfer mechanism of decomposition of ammonium perchlorate, and experimental results have been interpreted in this sense.

UR - http://www.scopus.com/inward/record.url?scp=33644945746&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33644945746&partnerID=8YFLogxK

M3 - Article

VL - 9

SP - 141

EP - 148

JO - Combustion and Flame

JF - Combustion and Flame

SN - 0010-2180

IS - 2

ER -