A study of the growth mechanism of bismuth silicon oxide during LHPG method

NCUIR > Engineering College > Graduate Institute of Mechanical Engineering > journal & Dissertation > Item 987654321/26908

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/26908

Title:	A study of the growth mechanism of bismuth silicon oxide during LHPG method
Authors:	Chen,JC;Liu,LT;Young,CC
Contributors:	機械工程研究所
Keywords:	NEAR-INFRARED SPECTRA;FLOAT-ZONE;LINBO3;BI12SIO20;LIF
Date:	1999
Issue Date:	2010-06-29 18:03:00 (UTC+8)
Publisher:	中央大學
Abstract:	Single-crystal fibers of Bi12SiO20 were grown by a laser-heated pedestal growth (LHPG)method. The thermal radiative emissions during the growth were monitored by a thermal imaging radiometer with a 5 mu m bandpass filter. The variation in thermal emissions in the 5 mu m spectrum during the growth process reflects the interior structure of re-crystallized Bi12SiO20. When a crystal fiber was grown upward from a sintered powder rod, bubbles oscillate in the upper floating zone and may be caught within the grown crystal, which may cause the inclusions, color fragments, voids or other defects inside the grown crystal. When we grew a crystal downward to minimize the effects of the bubbles, the defects were reduced, but could still be observed inside the crystal. In order to solve this problem, we used a two-pass method that is during the first pass, we grew downward to obtain an almost bubble-free polycrystalline rod. In the second pass, we grew the single-crystal fiber upward using the polycrystal source rod obtained in the first pass. The grown fiber has uniform luster and higher transmissivity. (C) 1999 Elsevier Science B.V. All rights reserved.
Relation:	JOURNAL OF CRYSTAL GROWTH
Appears in Collections:	[Graduate Institute of Mechanical Engineering] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	492	View/Open

社群 sharing

Loading...