sialonn.
/ˈsʌɪəlɒn/ Chemistry.
Any of a large class of refractory materials which have crystal structures similar to those of silica and the silicates but contain aluminium and nitrogen in the polymeric framework in addition to silicon and oxygen.
ΚΠ
1973 K. H. Jack in Trans. & Jrnl. Brit. Ceramic Soc. 72 380/1 The structural unit of β-silicon nitride is SiN4; of α it is on average SiN3.9O0.1; of oxynitride it is SiN3O; and of the new ‘sialons’ it is (Si, Al)(O, N)4.
1975 P. Popper Special Ceramics VI. p. ix Several papers deal with materials in the Si-Al-O-N or Mg-Si-Al-O-N system. Colloquially, workers in this field have become accustomed to refer to them as ‘sialons’.
1981 Economist 11 Apr. 98/3 The new materials mentioned at last week's conference included..very strong ceramics called sialons.
This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2018).
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