The Phase Relations in the In2O3-Al2ZnO4-ZnO System at 1350°C

✍ Scribed by Masaki Nakamura; Noboru Kimizuka; Takahiko Mohri; Mitsumasa Isobe

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 370 KB
• Volume: 105
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1993.1246

✦ Synopsis

Phase relations in the (\mathrm{In}{2} \mathrm{O}{3}-\mathrm{Al}{2} \mathrm{ZnO}{4}-\mathrm{ZnO}) system at (1350^{\circ} \mathrm{C}) are determined by a classical quenching method. This system consists of (\mathrm{In}{2} \mathrm{O}{3}, \mathrm{Al}{2} \mathrm{ZnO}{4}, \mathrm{ZnO}), and homologous phases (\operatorname{In~} \mathrm{AO}{3}(\mathrm{ZnO}){m}(m=) (2,3, \ldots) ) having solid solutions with (\mathrm{LuFeO}{3}\left(\mathrm{ZnO}{m}\right.)-type crystal structures. These solid solution ranges are as follows: (\mathbf{I n}{1+x{1}} \mathrm{Al}{1-x{1}} \mathrm{O}{3}\left(\mathrm{ZnO}{2}\left(x_{1}=0.70\right)-\mathrm{In}{1+x{2}} \mathrm{Al}{1-x{2}} \mathrm{O}{3}\left(\mathrm{ZnO}{2}\left(x_{2}=0.316-0.320\right), \mathbf{I n}{2}\right.\right.) (\mathrm{O}{3}(\mathrm{ZnO}){3}-\mathrm{In}{1+x} \mathrm{Al}{1-x} \mathrm{O}{3}(\mathrm{ZnO}){3}(x=0.230), \mathrm{In}{2} \mathrm{O}{3}\left(\mathrm{ZnO}{4}-\mathrm{In}{1+x} \mathrm{Al}{1-x} \mathrm{O}{3}(\mathrm{ZnO}){4}(x=0.15-0.16), \operatorname{In}{2} \mathrm{O}{3}\right.) ((\mathrm{ZnO}){5}-\mathrm{In}{j+x} \mathrm{Al}{1-x} \mathrm{O}{3}(\mathrm{ZnO}){5}(x=0.116-0.130), \ln {2} \mathrm{O}{3}\left(\mathrm{ZnO}{6}-\mathrm{In}{1+x} \mathrm{Al}{1-x} \mathrm{O}{3}(\mathrm{ZnO}){6}(x=0.000-0.111)\right.), (\mathrm{In}{2} \mathrm{O}{3}\left(\mathrm{ZnO}{7}-\mathrm{In}{1+x} \mathrm{Al}{1-x} \mathrm{O}{3}(\mathrm{ZnO}){7}(x=0.08), \mathrm{In}{2} \mathrm{O}{3}\left(\mathrm{ZnO}{8}-\mathrm{In}{1+x} \mathrm{Al}{1-x} \mathrm{O}{3}\left(\mathrm{ZnO}{8}(x\right.\right.\right.) : undetermined), and (\operatorname{In}{2} \mathrm{O}{3}(\mathrm{ZnO}){m}-\operatorname{In} \mathrm{AlO}{3}(\mathrm{ZnO}){m}(m=9,10,11,13,15,17), and 19()). The space groups of these homologous phases belong to (R \overline{3} m) for (m=) odd or (P 6{3} / m m c) for (m=) even. Their crystal structures, (\operatorname{In}{1+x} \mathrm{Al}{1-x} \mathrm{O}{3}) ((\mathrm{ZnO}){m}(0<x<1)), consist of three kinds of layers: an (\mathrm{InO}{1.5}) layer, an (\left(\ln {x} \mathrm{Al}{1-x} \mathrm{Zn}{2} \mathrm{O}{2.5}\right.) layer, and (\mathrm{ZnO}) layers. A comparison of the phase relations in the (\ln {2} \mathrm{O}{3}-\mathrm{M}{2} \mathrm{ZnO}_{4}-\mathrm{ZnO}) systems ( (M=\mathrm{Fe}, \mathrm{Ga}), or (\mathrm{Al}) ) is made and their characteristic features are discussed in terms of the ionic radii and site preferences of the (M) cations. 1993 Academic Press, Inc.