Detail of "12032-30-3"

Reference

Analysis of porous structure in plasma-sprayed coating

Analysis of porous structure in plasma-sprayed coating. Juzkova, Radka; Ctibor, Pavel; Benes, Viktor (Private College of Economic Studies, Ltd., Prague 18000, Czech Rep.). Image Analysis & Stereology, 23(1), 45-52 (English) 2004 Slovenian Society for Stereology and Quantitative Image Analysis. CODEN: IASMCE. ISSN: 1580-3139. DOCUMENT TYPE: Journal CA Section: 57 (Ceramics) The paper is devoted to the quant. anal. of the microstructure of a ceramic plasma-sprayed coating. The aim is to describe the size and spatial distribution of approx. 12032-30-3 and 12049-50-2 are also in the experiment. convex pores. A whole 3D specimen was subsequently ground to obtain serial sections of small distance. Using image anal. techniques the centroids and size of individual pores are detected and the obtained data analyzed by means of summary spatial statistics. The tests of complete spatial randomness are performed using various 3D characteristics and important practical conclusions for the material fabrication procedure are obtained. .

Geikielite-ecandrewsite solid solutions: synthesis and crystal structures of the Mg1-xZnxTiO3 (0 ￡ x ￡ 0

Geikielite-ecandrewsite solid solutions: synthesis and crystal structures of the Mg1-xZnxTiO3 (0 ￡ x ￡ 0.8) series. Liferovich, Ruslan P.; Mitchell, Roger H. (Department of Geology, Lakehead University, Thunder Bay, ON P7B 5E1, Can.). Acta Crystallographica, Section B: Structural Science, B60(5), 496-501 (English) 2004 Blackwell Publishing Ltd. CODEN: ASBSDK. ISSN: 0108-7681. DOCUMENT TYPE: Journal CA Section: 75 (Crystallography and Liquid Crystals) Section cross-reference(s): 57, 78 The crystal structures of members of the geikielite-ecandrewsite solid soln. series, Mg1-xZnxTiO3 (0 ￡ x ￡ 0.8 a.Chemicals with cas numbers 12032-30-3 and 259199-68-3 also play role.p.f.u. Zn; a.p.f.u. = atoms per formula unit), synthesized by ceramic methods in air at ambient pressure, were characterized by Rietveld anal. of x-ray powder diffraction patterns. Crystallog. data and at. coordinates are given. These synthetic titanates adopt an ordered R3 structure similar to that of ilmenite. The max. soly. of Zn in MgTiO3 is considered to be ~ 0.8 a.p.f.u. Zn, as compds. with greater Zn content could not be synthesized at ambient conditions. Data are given for the cell dimensions and at. coordinates, together with bond lengths, vols. and distortion indexes for all the coordination polyhedra. Within the solid-soln. series unit-cell parameters and unit-cell vols. increase with Zn content. All compds. consist of distorted (Mg,Zn)O6 and TiO6 polyhedra and, in common with geikielite and ilmenite (sensu lato), TiO6 polyhedra are distorted to a greater extent than (Mg,Zn)O6. The displacements of (Mg,Zn) and Ti from the centers of their coordination polyhedra vary insignificantly with increasing Zn content. The interlayer distance across the vacant octahedral site in the TiO6 layer decreases slightly with the entry of the larger Zn2+ cation into the viA site. The empirically obtained upper limit of the Goldschmidt tolerance factor (t) for A2+BO3 compds. adopting an ordered R3 structure is 0.755. The absence of natural solid solns. between geikielite and ecandrewsite seems to be due to the contrasting geochem. of Mg and Zn rather than for crystallochem. reasons. .