Structure of liquid aluminum oxide

被引：212

作者：

Ansell, S ^{[1
]}

Krishnan, S ^{[1
]}

Weber, JKR ^{[1
]}

Felten, JJ ^{[1
]}

Nordine, PC ^{[1
]}

Beno, MA ^{[1
]}

Price, DL ^{[1
]}

Saboungi, ML ^{[1
]}

机构：

[1] CONTAINERLESS RES INC, EVANSTON, IL 60201 USA

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.78.464

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The total structure factor, S(Q), and the corresponding radial distribution function, G(r), for supercooled and stable liquid aluminum oxide have been measured with x-ray synchrotron radiation. The specimens were levitated in a conical nozzle and melted with a laser, achieving temperatures in the range of 2200-2700 K. The first two peaks in S(Q) reveal intermediate-range order and dense random packing of atoms, similar to that observed in many network liquids. The first two peaks in G(r) are consistent with AlO45- structural units and show that Al2O3 undergoes a major structural rearrangement on melting with an Al coordination change from octahedral to tetrahedral. The structure does pot change appreciably with temperature in the stable and supercooled liquid. implications of these results are discussed in connection with the solidification of aluminum oxide.

引用

页码：464 / 466

页数：3

共 25 条

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