Effects of ultraviolet irradiation and corona discharge on the crystallization from NiO/SiO2 mixed gels

Tetsuhiko Isobe, Satoshi Omura, Mamoru Senna

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Fine particles and thin films of NiO/SiO2 mixed gels, prepared from a bidentate alkoxide, were irradiated by a XeCl excimer laser or by a corona discharge. A part of NiO was initially dissolved in SiO2, and was segregated and crystallized on heating at 10 K min-1 to 800°C in air. Subsequently, amorphous SiO2 crystallized into cristobalite at 900°C. Based on the change in the interplanar spacing of cristobalite, ultraviolet irradiation or discharge promoted the segragation of NiO. Transmission electron micrographs of substrateless gel thin films revealed that corona discharge treatment brought about the formation of uniform NiO particles as small as 5 nm.

Original languageEnglish
Pages (from-to)367-371
Number of pages5
JournalJournal of Non-Crystalline Solids
Volume179
Issue numberC
DOIs
Publication statusPublished - 1994 Nov 4

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electric corona
Crystallization
Silicon Dioxide
Gels
Irradiation
gels
crystallization
Thin films
irradiation
alkoxides
Excimer lasers
thin films
excimer lasers
Particles (particulate matter)
spacing
Heating
heating
Electrons
air
Air

ASJC Scopus subject areas

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials

Cite this

Effects of ultraviolet irradiation and corona discharge on the crystallization from NiO/SiO2 mixed gels. / Isobe, Tetsuhiko; Omura, Satoshi; Senna, Mamoru.

In: Journal of Non-Crystalline Solids, Vol. 179, No. C, 04.11.1994, p. 367-371.

Research output: Contribution to journalArticle

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