Sulfur - a new information on this seemingly well-known element

被引：0

作者：

Cernosek, Z. ^{[1
]}

Holubova, J. ^{[1
]}

Cernoskova, E. ^{[2
]}

Ruzicka, A. ^{[1
]}

机构：

[1] Univ Pardubice, Fac Chem Technol, Dept Gen & Inorgan Chem, Nam Legii 565, Pardubice, Czech Republic

[2] Univ Pardubice, Czech Acad Sci VVI, Inst Macromol Chem, Joint Lab Solid State Chem, Pardubice, Czech Republic

来源：

JOURNAL OF NON-OXIDE GLASSES | 2009年 / 1卷 / 01期

关键词：

Sulfur; melting; lambda-transition; glass transition; differential scanning calorimetry (DSC); StepScan DSC; Raman spectroscopy; XRD analysis;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Melting of orthorhombic sulfur (alpha-S) was investigated using DSC and X-ray analysis. It was found that reversible transformation orthorhombic to triclinic modification precedes melting. DSC and Raman spectroscopy study indicate that so-called lambda-transition is reversible one and opening of S-8 rings and S-n formation seems not to be a predominant process at that transition. Viscosity glass transition of glassy sulfur prepared by rapid cooling of equilibrium melt in the temperature region of anomalous viscosity doesn't depend on melt temperature, but temperature dependence of undercooled melt viscosity (so-called fragility) does. When equilibrium temperature increases, undercooled melt becomes stronger, according to Angell's classification.

引用

页码：38 / 42

页数：5

共 16 条

[1] STRUCTURAL INSTABILITY AND RELAXATION IN LIQUID AND GLASSY PHASES NEAR THE FRAGILE LIQUID LIMIT [J].