The intermediate compound in the In2O3-SnO2 system

Abstract

The In2Oa-SnO 2 binary system between 1473 and 1873 K has been investigated bY TEM observations in detail. The intermediate compound has been detected above 1573 K in the composition range from 47.9 to 59.3 mol % SnO2, that crystal structure is long range ordered cubic system similar to In203 phase. On the other hand, below 1473 K, the intermediate compound is decomposed into In203 and SnO2 phases, according to the eutectoid reaction.

Structural Studies of Tin-Doped Indium Oxide (ITO) and In4Sn3O12

“…The lattice parameters were deduced from Rietveld refinement of X-ray and neutron powder diffraction profiles. As (10)(11)(12). This indicates that the solubility limit of tin in indium oxide at 1400°C must be close to 6 %, as previously found for films (4) and ceramics (11).…”

“…The solubility limit of tin in In O ceramics is not known with precision but has been estimated to be between 6 and 11% Sn (6,(8)(9)(10)(11) For the rest of the paper, the dopant content will always be expressed as atomic percent, i.e., [ ) has been reported (10-12), but we lack structural information on this compound and on the tin neutralization effect.…”

Hyperfine interactions and site occupancy in Sn‐doped In2O3 (ITO)

“…This substitution process is possible because the ionic radius of tin (r = 0.71 Å) is smaller than that of indium (r = 0.81 Å) [4]. The solubility limit of tin in a powder sample of In 2 O 3 is estimated to be between 6 and 11 at% Sn [5][6][7]. The presence of the dopant atom modifies the local electrostatic potential and creates its own characteristic electric field gradient (EFG) for the probe atom.…”

Sensing characterization of Sn/In/Ti nanocomplex oxides for CO, CH4 and NO2

“…If In 3+ were substituted in the SnO 2 lattice, the lattice parameters would have observable changes, but the changes in lattice unit cell parameters of a and c were negligible in XRD analysis. Enoki et al [7] reported that the solubility of In 2 O 3 in SnO 2 was 3.9-5.6 mol% at temperature below 1200 and the sol ℃ ubility varied only slightly with the temperature by energy dispersion X-ray micro-analyzer equipped with STEM. The presence of In 2 O 3 at nanocomposite surface have also been conformed by XPS analysis.…”