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Laser-heated Pedestal Growth of Colorless Single Crystal Fiber by M.R.B. Andreeta; E.R.M. Andreeta; A.C. Hernandes is a Engineering article available to read on EtoBox.

What is Laser-heated Pedestal Growth of Colorless Single Crystal Fiber about?

We present a methodology that allowed us to prepare 400-800 mm diameter, 3 cm long colorless and transparent LaAlO 3 single crystal fibers by the laser-heated pedestal growth technique. This technique consists of growing LaAlO 3 fibers from pedestals prepared with a mixture of appropriate amounts of metal oxides without a prior chemical reaction. We also show that the use of prereacted and annealed pedestals produces dark fibers. LaAlO 3 fibers prepared from different La/Al ratio were studied. Pedestals with La=Alp1 resulted in fibers with Al rich-phase microscopic inclusions. Fibers grown from La=Al41 were colorless, inclusion-free and transparent throughout their entire length. We also obtained transparent LaAlO 3 fibers from prereacted and high-temperature (1400 1C) annealed pedestals, although the fibers were brownish in color. The fiber/pedestal pulling ratio ranged from 0.9 to 1.1. The fiber growth direction was /1 1 1S: The crystal structure symmetry obtained for LaAlO 3 was R 3c with a cell parameter of a 1⁄4 b 1⁄4 5:368ð3Þ ( A and c 1⁄4 13:12ð4Þ ( A: Optical and electron microscopy were used to characterize the fibers and the crystal/ liquid interface.

Who reads Laser-heated Pedestal Growth of Colorless Single Crystal Fiber?

Author

M.R.B. Andreeta; E.R.M. Andreeta; A.C. Hernandes

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-0248)

Published

2005

Language

EN

Field

Engineering (Physical Sciences)