Chemical durability behaviour of bulk glasses in the Er-SiAlON system: Surface characterisation by SEM

Dolekcekic E., Kaya G., Karasu B., Pomeroy M., Hampshire S.

EURO CERAMICS VIII, PTS 1-3, cilt.264-268, ss.1887-1890, 2004 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 264-268
  • Basım Tarihi: 2004
  • Doi Numarası: 10.4028/www.scientific.net/kem.264-268.1887
  • Dergi Adı: EURO CERAMICS VIII, PTS 1-3
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1887-1890
  • Anahtar Kelimeler: SiAlON, chemical durability, scanning electron microscopy, ALUMINOSILICATE OXYNITRIDE GLASSES, CRYSTALLIZATION
  • Anadolu Üniversitesi Adresli: Hayır

Özet

Er-SiAlON glasses were produced by melting appropriate powder mixtures under nitrogen at 1715 degreesC using a cation ratio composition of Er:Si:Al = 3.45:3:2 and with varying nitrogen contents (N= 5 to 22 equivalent %). Chemical durability tests were performed by immersing the specimens into 1M NaOH solution at 75 degreesC. The results were evaluated based on the weight changes of the specimens that were recorded at regular intervals of one week. In this work, the effect of nitrogen content in the glass structure on chemical durability is discussed. Surface features (cavities etc.) on each of the chemical durability tested samples were observed and analysed by a scanning electron microscopy (SEM). Initial results present that Er-SiAlON glasses can be good candidates for applications involving high basicity environments.