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Silicon ingot casting by gas assisted solidification 气助凝固硅锭铸造
Progress in Crystal Growth and Characterization
Pub Date : 1988-01-01 DOI: 10.1016/0146-3535(88)90004-4
C.H. Chu , C.Y. Sun , H.L. Hwang

Gas Assisted Solidification (GAS) is a casting method to provide low cost silicon materials for the fabrication of solar cells. In this paper, a detailed study on the mode of solidification is made according to the operational variables. The most appropriate soaking temperature is about 40 °C above the melting point of silicon, with an optimum soaking period of 4.5 hr. A slow temperature decreasing rate of about 1–2 °C/min is to ensure the formation of large grains. A triggering time of gas flow close to the end of the soaking period is most desirable. With a steep increment of gas flow rate, a large gas flow rate of about 300 1/min in the steady state period is to set for the conditions of growing elongated grains. The grown ingots were subjected to chemical and physical characterization, and some preliminary data will also be presented for their correlation.

气体辅助凝固(Gas)是一种为制造太阳能电池提供低成本硅材料的铸造方法。本文根据操作变量对凝固模式进行了详细的研究。最适宜的浸泡温度为硅熔点以上40℃左右，最适宜的浸泡时间为4.5 h。缓慢的降温速度约为1-2℃/min，以保证大晶粒的形成。气体流动的触发时间接近浸泡期的结束是最理想的。随着气体流速的急剧增加，在稳态阶段设置较大的气体流速，约为300 1/min，以满足拉长晶粒生长的条件。对长大的钢锭进行了化学和物理表征，并提出了一些初步的数据来说明它们之间的相关性。
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引用次数: 0
Some applications of pattern fitting to powder diffraction data 模式拟合在粉末衍射数据中的一些应用
Progress in Crystal Growth and Characterization
Pub Date : 1987-01-01 DOI: 10.1016/0146-3535(87)90018-9
J.I. Langford
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引用次数: 24
Single crystal diffraction studies of stacking faults in close-packed structures 密排结构中层错的单晶衍射研究
Progress in Crystal Growth and Characterization
Pub Date : 1987-01-01 DOI: 10.1016/0146-3535(87)90017-7
M.T. Sebastian , P. Krishna
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引用次数: 18
Compound index 复合索引
Progress in Crystal Growth and Characterization
Pub Date : 1987-01-01 DOI: 10.1016/0146-3535(87)90028-1
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引用次数: 0
X-Ray diffraction on single crystals at high pressure 高压下单晶的x射线衍射
Progress in Crystal Growth and Characterization
Pub Date : 1987-01-01 DOI: 10.1016/0146-3535(87)90020-7
H. Ahsbahs
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引用次数: 28
Real-time and stroboscopic topography 实时频闪地形
Progress in Crystal Growth and Characterization
Pub Date : 1987-01-01 DOI: 10.1016/0146-3535(87)90024-4
B.K. Tanner, J.K. Cringean
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引用次数: 9
X-ray topography of twinned crystals 孪晶的x射线形貌
Progress in Crystal Growth and Characterization
Pub Date : 1987-01-01 DOI: 10.1016/0146-3535(87)90023-2
H. Klapper
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引用次数: 29
Development of large single crystals for electronic, electro-optic and acousto-optic devices 用于电子、电光和声光器件的大单晶的开发
Progress in Crystal Growth and Characterization
Pub Date : 1987-01-01 DOI: 10.1016/0146-3535(87)90002-5
R. Mazelsky, D. K. Fox
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引用次数: 3
X-ray topographic studies of phase transition in crystals; the α-β transition of quartz 晶体相变的x射线形貌研究石英的α-β转变
Progress in Crystal Growth and Characterization
Pub Date : 1987-01-01 DOI: 10.1016/0146-3535(87)90025-6
N. Kato, K. Gouhara

This article reviews our recent work on the α-β phase transition of quartz as a case study of phase transitions. In this work, the principal subject was to elucidate an intermediate phase (IP) which was found between α and β phases by in situ topographic observations. It turned out that IP was an incommensurate phase having a new domain structure. Also, an anomalous structure very near the transition from IP to α phase was elucidated. Since the phase transition is characterized by the structural changes on four levels of spatial scale from Å to cm, it was very necessary to use both of goniometry and topography. An emphasis is put on the methodological aspects which are useful for the study of any other phase transitions.

本文以石英相变为例，综述了近年来在α-β相变方面的研究进展。在这项工作中，主要课题是通过原位地形观测阐明在α和β相之间发现的中间相(IP)。结果表明，IP是一个具有新的域结构的不相称阶段。此外，在极接近IP相向α相转变的地方还发现了一个异常结构。由于相变的特征是在Å到cm的四个空间尺度上的结构变化，因此同时使用角学和地形学是非常必要的。重点放在方法论方面，这对研究任何其他相变都是有用的。
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引用次数: 1
Nucleation, growth and characterization of thin solid films 固体薄膜的成核、生长和表征
Progress in Crystal Growth and Characterization
Pub Date : 1987-01-01 DOI: 10.1016/0146-3535(87)90011-6
U.V. Subba Rao , J. Siva Kumar , K. Narasimha Reddy
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引用次数: 5
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