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융제법에 의한 규회석 단결정 성장에 관한 연구
Growth of CaSiO3 Single Crystals by Flux Method
HWAHAK KONGHAK, February 1975, 13(1), 17-22(6), NONE
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Abstract
염화나트리움을 융제로 하여 의규회석(α-CaSiO3)의 단결정을 성장시켰으며, 육성방법은 백금도가니를 사용하여 1,200 ℃에서 800 ℃까지 3∼5 ℃/hr의 서냉속도로 행하였다. 출발원료는 화학양론적인 물비(CaO : SiO2=1 : 1)에 의해 고상 또는 수열반응으로 합성하였으며 이를 원료로해서 얻은 단결정들은 b축으로 성장한 단책상(lath-like)결정이었다. 이는 도가니 벽면에 서냉에 의하여 과포화용액의 침전으로 말미암아 자연 발생적인 핵이 생성되어 성장한 것이며 이 단결정들을 광학현미경으로 크기를 조사하고 X-선 회절법 및 투과와 주사전자현미경으로 여러 특성을 연구하였다.
Single crystals of pseudo-wollastonite (α-CaSiO3) were growth by using NaCl as flux. The experiments for growing crystals were carried out in platinum crucible by cooling slowly the fused matter from 1,200 ℃ to 800 ℃ at a rate of 3∼5 ℃/hr. The starting raw materials used have been synthesized with stoichiometric mole ratio (CaO : SiO2=1 : 1) by solid and hydrothermal rection. The grown crystals obtained in such a method have lath-like habit elongated to b-axis. These seemed to be grown from spontaneous nuclei which were precipitated on the wall of the crucible from the supersaturated solution by slow cooling. The crystal size was measured by an optical microscope and various characteristics were also investigated by using X-ray diffractometer, electron microscope, and scanning microscope.