Investigation of alumina lattice defects by means of thermoluminescence experiments

Brovetto, P.; Delunas, A.; Maxia, V.; Spano, G.; Mazza, Daniele; Vallino, M.

doi:10.1007/bf02451019

Cited by 3 publications

(6 citation statements)

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“…The present results are to be compared with those of previous studies on the TL emission of a and y-aluminas devoid of B203 [2,3]. Even though phase a is found in general only above 1100 ~ samples prepared from aluminum nitrate using hydrazine as a special reducing agent yielded phase a already at 500 ~ The TL pattern of these samples, as recorded by means of the present apparatus, is practically coincident with the one shown in fig.…”

Section: -Experimentssupporting

confidence: 79%

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A study of lattice defects in solids belonging to Al2O3−B2O3 and Al2O3−SiO2 systems by thermoluminescence experiments

et al. 1991

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(ricevuto il 25 Marzo 1991; approvato il 2 Giugno 1991)Summary. --Spectrally resolved thermoluminescent emission has been investigated in solids belonging to A1203-B203 and A1203-SIO2 systems. These solids, which are characterized by a structure like that of alumino-silicate mullite, contain a high density of oxygen and aluminum or boron lacunae. This fact favours the occurrence of both-sign interstitial ions acting as carrier traps. The results show a close similarity with those obtained when studying, with the same experimental method, the thermoluminescent emission of alumina. The overall analysis of data allows for reliable conclusions on the nature of crystal defects in these materials. PACS 78.60.Kn -Thermoluminescence. PACS 61.70.Ey -Other point defects.

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Section: -Experimentssupporting

confidence: 79%

“…Previous experiments on the TL emission of a and ~, alumina [2,3] evidentiated the role of interstitial A13+ ions lying in lacunar lattice sites. We report here on experiments with solids belonging to A1203-B20a and Ale08-Si02 systems, in which lacunar sites are present both for trivalent cations and oxygen ions.…”

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confidence: 97%

A study of lattice defects in solids belonging to Al2O3−B2O3 and Al2O3−SiO2 systems by thermoluminescence experiments

et al. 1991

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“…A thorough treatment would require the theoretical evaluation of the parameters appearing in eqs. (2) to (5). However, the proposed interpretation, is, in our opinion, convincing enough by virtue of its simplicity.…”

Section: -Final Remarksmentioning

confidence: 57%

“…This fact, which explains the variability observed in the TL emission features, is probably a general property of lattice defects, because, when studying other ionic crystal, i.e. A120s and Ca F12, the same situation was met with [4][5][6].…”

Section: -Experimentsmentioning

confidence: 84%

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A study of KCL lattice defects by thermoluminescence experiments

et al. 1991

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Summary. --The thermoluminescent emission of X-irradiated potassium chloride is recorded simultaneously vs. temperature and wavelength. Samples of different origin and prepared through different processes, including thermal treatments, are examined. Most records show essentially two glow peaks, the wavelength of the one at higher temperature being slightly shifted toward the red. On the whole, experimental results suggest that luminescent centres are originated by potassium ion vacancies lying at a variable distance from interstitial potassium ions. The observed red shift is ascribed to the Coulomb energy of the pairs of these point defects of opposite charges. PACS 78.60.Kn -Thermoluminescence. PACS 61.70.Ey -Defects in crystals.

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