Section 4. Physical properties of unirradiated and irradiated ceramics - Dielectric spectroscopy of alumina ceramics over a wide frequency range

被引：53

作者：

Vila, R ^{[1
]}

Gonzalez, M ^{[1
]}

Molla, J ^{[1
]}

Ibarra, A ^{[1
]}

机构：

[1] CIEMAT, E-28040 Madrid, Spain

来源：

JOURNAL OF NUCLEAR MATERIALS | 1998年 / 253卷

关键词：

D O I：

10.1016/S0022-3115(97)00308-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Aluminum oxide (either in single or polycrystalline form) is one of the insulator materials with broad application in high radiation environments. Despite this demanding use, very different values for the dielectric properties have been found in the literature before and after irradiation. In order to obtain a reliable database, the dielectric properties of several unirradiated commercial alumina grades have been measured over a wide frequency (1 kHz to 15 GHz) and temperature range (100 to 300 K). Loss tangent differences over three orders of magnitude have been observed. The possible explanations and the role of some impurities (mainly Mg and Fe) are analyzed. (C) 1998 Elsevier Science B.V.

引用

页码：141 / 148

页数：8

共 30 条

[1]

ALFORD NM, 1996, APPL PHYS, V80, P6895

[2]

ANDO M, 1986, Patent No. 4601990

[3]

[Anonymous], 1892, PHILOS MAG, DOI DOI 10.1080/14786449208620364

[4]

Ashcroft N.W., 1976, SOLID STATE PHYS