非晶态固体结构
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非晶态固体结构
非晶体的宏观特性
• 有玻璃转化温度(Tg)，无熔点。 • 无规则的多面体几何外型（可以制成玻璃体、丝、 薄膜等特殊形态）。 • 物理性质各向同性。 • 均匀性来源于原子无序分布的统计性规律，无晶 界。
非晶体微观特征
• 长程无序、近程有序
晶体（a）和玻璃体（b）的结构特点
The continuous random network structure of amorphous silicon dioxide, notice that each Si atom (gold shpere) has 4 bonds, and each oxygen atom (red sphere) has 2 bonds.
Prof. Kevin Homewood
www.ee.surrey.ac.uk/ibc/index.php?target=3:20
非晶体微观特征
XRD：宽化的衍射带
• Powder XRD patterns showing an example of the thermal stability of ETS-4 during heating up to 800oC • systems Na2O – TiO2 – SiO2 – H2O, K2O – TiO2 – SiO2 – H2O, and Na2O - K2O - TiO2 - SiO2 H2O • ETS-4, ETS-10, STS (AM-2), titanosilicate analogue of the mineral sitinakite, a cubic titanosilicate analogue of the mineral pharmacosiderite (GTS-1) and a rombohedral titanosilicate analogue of the mineral pharmacosiderite
www.rss21.iis.u-tokyo.ac.jp/.../index.html
•
•
www.answers.com/topic/amorphous-carbon
非晶体的宏观特性 HfO2
http://hpc.epfl.ch/
First-principles model of amorphous hafnium aluminate: a promising gate insulator material of CMOS transistor of next generation. Electronic and lattice dielectric responses of the model are calculated by first principles.
非晶体的宏观特性
衍射为弥散的晕
• Cross sectional TEM image of an amorphous iron disilicide layer deposited at room temperature. a), b) and c) are micro-diffraction patternstaken from the top amorphous layer, the interface region and the silicon substrate respectively.
http://www.clmc.bas.bg/Annreps/Annrep10 /annrep10.htm
ห้องสมุดไป่ตู้
非晶体的宏观特性
• r(Si-O) = 1.62Å; r(O-O) = 2.65Å
非晶体的宏观特性 无定形碳 amorphous carbon 结构模型
• Vander Wal, R. (May 1996). "Soot Precursor Material: Spatial Location via Simultaneous LIF-LII Imaging and Characterization via TEM". NASA Contractor Report (198469). Retrieved on 2006-06-28. (1997) “diamond-like carbon films”, IUPAC Compendium of Chemical Terminology (pdf), 2nd edition, International Union of Pure and Applied Chemistry. Retrieved on 2006-06-28. (1997) “amorphous carbon”, IUPAC Compendium of Chemical Terminology (pdf), 2nd edition, International Union of Pure and Applied Chemistry. Retrieved on 2006-06-28.
非晶体的宏观特性
• 有玻璃转化温度(Tg)，无熔点。 • 无规则的多面体几何外型（可以制成玻璃体、丝、 薄膜等特殊形态）。 • 物理性质各向同性。 • 均匀性来源于原子无序分布的统计性规律，无晶 界。
非晶体微观特征
• 长程无序、近程有序
晶体（a）和玻璃体（b）的结构特点
The continuous random network structure of amorphous silicon dioxide, notice that each Si atom (gold shpere) has 4 bonds, and each oxygen atom (red sphere) has 2 bonds.
Prof. Kevin Homewood
www.ee.surrey.ac.uk/ibc/index.php?target=3:20
非晶体微观特征
XRD：宽化的衍射带
• Powder XRD patterns showing an example of the thermal stability of ETS-4 during heating up to 800oC • systems Na2O – TiO2 – SiO2 – H2O, K2O – TiO2 – SiO2 – H2O, and Na2O - K2O - TiO2 - SiO2 H2O • ETS-4, ETS-10, STS (AM-2), titanosilicate analogue of the mineral sitinakite, a cubic titanosilicate analogue of the mineral pharmacosiderite (GTS-1) and a rombohedral titanosilicate analogue of the mineral pharmacosiderite
www.rss21.iis.u-tokyo.ac.jp/.../index.html
•
•
www.answers.com/topic/amorphous-carbon
非晶体的宏观特性 HfO2
http://hpc.epfl.ch/
First-principles model of amorphous hafnium aluminate: a promising gate insulator material of CMOS transistor of next generation. Electronic and lattice dielectric responses of the model are calculated by first principles.
非晶体的宏观特性
衍射为弥散的晕
• Cross sectional TEM image of an amorphous iron disilicide layer deposited at room temperature. a), b) and c) are micro-diffraction patternstaken from the top amorphous layer, the interface region and the silicon substrate respectively.
http://www.clmc.bas.bg/Annreps/Annrep10 /annrep10.htm
ห้องสมุดไป่ตู้
非晶体的宏观特性
• r(Si-O) = 1.62Å; r(O-O) = 2.65Å
非晶体的宏观特性 无定形碳 amorphous carbon 结构模型
• Vander Wal, R. (May 1996). "Soot Precursor Material: Spatial Location via Simultaneous LIF-LII Imaging and Characterization via TEM". NASA Contractor Report (198469). Retrieved on 2006-06-28. (1997) “diamond-like carbon films”, IUPAC Compendium of Chemical Terminology (pdf), 2nd edition, International Union of Pure and Applied Chemistry. Retrieved on 2006-06-28. (1997) “amorphous carbon”, IUPAC Compendium of Chemical Terminology (pdf), 2nd edition, International Union of Pure and Applied Chemistry. Retrieved on 2006-06-28.