PURIFICATION AND UV-VIS LIGHT-ABSORPTION PROPERTY OF SOURCE MATERIALS FOR CVD OF HIGH-TC SUPERCONDUCTING FILMS

被引：16

作者：

HASHIMOTO, T

KITAZAWA, K

SUEMUNE, Y

YAMAMOTO, T

KOINUMA, H

机构：

[1] UNIV TOKYO, FAC ENGN, DEPT IND CHEM, BUNKYO KU, TOKYO 113, JAPAN

[2] NIHON KAGAKU SANGYO CO LTD, SOKA 340, JAPAN

[3] TOKYO INST TECHNOL, RESOURCES UTILIZAT RES LAB, MIDORI KU, YOKOHAMA, KANAGAWA 227, JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1990年 / 29卷 / 12期

关键词：

SUPERCONDUCTING FILM; CVD; NMR SPECTROSCOPY; TG MEASUREMENT; REFINEMENT; SOURCE MATERIAL; UV-VIS SPECTRA;

D O I：

10.1143/JJAP.29.L2215

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Purification and spectral properties of source material for CVD of high-T(c) superconducting films have been investigated quantitatively. Based on elemental analysis, TG, IR spectroscopy, and H-1-NMR spectroscopy, sublimation was verified to be satisfactory for the purification of Bi(C6H5)3, Ca(DPM)2, and Cu(DPM)2 (DPM: dipyvaloylmethane). Sr(DPM)2 was not sufficiently purified by the sublimation alone, but recrystallization from an ethanol solution in advance improved the purity of the sublimate, as verified by a significant decrease in the sublimation temperature. The UV-VIS spectra revealed that Bi(C6H5)3, Sr(DPM)2, Ca(DPM)2 and Cu(DPM)2 had high absorption coefficients at wavelengths around 254 nm, suggesting high possibilities of their photochemical decomposition by light irradiation from a low-pressure mercury lamp.

引用

页码：L2215 / L2218

页数：4

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