纳米SiO2形成柯石英的p-T相图

张广强; 徐跃; 孙敬姝; 许大鹏; 王德涌; 张琳; 薛燕峰; 宋更新; 刘晓梅; 苏文辉

doi:10.11858/gywlxb.2009.01.002

纳米SiO2形成柯石英的p-T相图

doi: 10.11858/gywlxb.2009.01.002

1.
吉林大学物理学院，吉林长春 130023；
2.
吉林大学测试科学实验中心，吉林长春 130023；
3.
哈尔滨工业大学凝聚态科学与技术研究中心，黑龙江哈尔滨 150001；
4.
中国科学院国际材料物理中心，辽宁沈阳 110015

详细信息

通讯作者:
许大鹏

计量
- 文章访问数: 7490
- HTML全文浏览量: 396
- PDF下载量: 830
出版历程
- 收稿日期: 2008-03-04
- 修回日期: 2008-04-07
- 发布日期: 2009-02-15

p-T Phase Diagram of Coesite Synthesized from Nanometer SiO2 Powder

1.
College of Physics, Jilin University, Changchun 130023, China;
2.
Test Science Experiment Center, Jilin University, Changchun 130023, China;
3.
Center for Condensed Matter Science and Technology, Harbin Institute of Technology, Harbin 150001, China;
4.
International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110015, China

More Information

Corresponding author: XU Da-Peng

摘要

摘要: 使用纳米SiO2粉体为原料，在2.0～4.2 GPa、150～1200 ℃范围内进行了一系列的高压高温实验研究，得到了该压力温度范围内晶化产物-石英与柯石英的p-T相图，而且该相图中的相边界在650 ℃以下斜率为负，在650 ℃以上基本水平。通过X射线衍射仪（XRD）、Raman光谱仪（Raman）、傅立叶红外光谱仪（FT-IR）、DSC-TGA差热分析仪（TG-DTA）-等表征手段，发现纳米SiO2原粉中水分（包含Si－OH和吸附水）的存在能显著降低合成柯石英的温度和时间，在4.2 GPa压力下得到了目前合成柯石英的最低温度190 ℃。常压下，合成的柯石英在800 ℃以下能够稳定存在，在1 000 ℃以上转化为-方石英。
- 纳米二氧化硅 /
- -石英 /
- 柯石英 /
- 高压高温 /
- 硅羟基
Abstract: With nanometer SiO2 powder as initial material, the p-T phase diagram (2.0～4.2 GPa, 150～1200 ℃) of -quartz and coesite was obtained by a series of experiments under high pressure and high temperature, and the slope of the boundary in the phase diagram is negative below 650 ℃ and is basically horizontal above 650 ℃. By means of transmission electron microscopy (TEM), X-ray diffractometer (XRD), Raman spectrometry (Raman), fourier transform infrared spectrometry (FT-IR), thermogravimetry and differential thermal analysis measurements (TG-DTA), the phenomenon that the water in the nanometer SiO2 can decrease the synthesis temperature of coesite and quicken reaction velocity was found, and the nanometer SiO2 can be crystallized into coesite under 4.2 GPa and 190 ℃, which is much lower than the synthesis temperatures of coesite that have been reported. Under ambient pressure, the coesite synthesized from nanometer SiO2 can stably exist at 800 ℃ and is transformed into cristobalite above 1 000 ℃.
- nanometer SiO2 /
- -quartz /
- coesite /
- high pressure and high temperature /
- Si－OH

HTML全文

参考文献(19)

Coes L Jr. A New Dense Crystalline Silica [J]. Science, 1953, 118: 131-132.

Chao E C T, Shoemaker E M, Madsen B M. First Natural Occurrence of Coesite [J]. Science, 1960, 132: 220-221.

Chopin C. Coesite and Pure Pyrope in High-Grad Bluechists of the Western Alps-A First Record and Some Consequences [J]. Contrib Mineral Petrol, 1984, 86: 107-118.

Smith D C. Coesite in Clinopyroxene in the Caledonides and Its Implications for Geodynamics [J]. Nature, 1984, 310: 641-644.

Hsu K J. Exhumation of High-Pressure Metamorphic Rocks [J]. Geology, 1991, 19: 107-110.

Coleman R G, Wang X. Ultrahigh Pressure Metamorphism [M]. Cambridge: Cambridge Univ Press, 1995.

Kato M, Sawamoto H, Kumazawa M, et al. Synthesis of Coesite from Ultra Fine Particles [J]. Japn J Appl Phys, 1975, 14(2): 181-183.

Liu X Y, Su W H, Wang Y F. Transformation of MFI to -Quartz and Coesite under High Pressure and High Temperature [J]. J Chem Soc, Chem Commun, 1993, 11: 891-892.

Liu S E, Xu D P, Liu X M, et al. Modelling Synthesis in Laboratory of Coesite in the Earth's Crust and Its Formation Mechanism [J]. Chinese Journal of High Pressure Physics, 2006, 20(2): 163-171. (in Chinese)

刘曙娥, 许大鹏, 刘晓梅, 等. 地表柯石英的实验室模拟合成及其形成机制的研究 [J]. 高压物理学报, 2006, 20(2): 163-171.

Su W H, Liu S E, Xu D P, et al. Effects of Local Mechanical Collision with Shear Stress on the Phase Transformation from -Quartz to Coesite Induced by High Static Pressure [J]. Phys Rev B, 2006, 73: 144110.

Sun J S, Liu X M, Xu D P, et al. Synthesis and Characterization of High-Pressure Metamorphic SiO2 Minerals [J]. Chem J Chinese U, 2006, 27(11): 2022-2025. (in Chinese)

孙敬姝, 刘晓梅, 许大鹏, 等. 高压变质二氧化硅矿物的合成及表征 [J]. 高等学校化学学报, 2006, 27(11): 2022-2025.

Su W H. Mossbauer Effect Used to Study Rare-Earth Oxides Synthesized by a High-Pressure Method [J]. Phys Rev B, 1988, 37(1): 35-37.

Li L P. Valence Characteristics and Structural Stabilities of the Electrolyte Solid Solutions Ce1－x RExO2 － (RE ＝Eu, Tb) by High Temperature and High Pressure [J]. Chem Mater, 2000, 12: 2567-2574.

Liu L, Mernagh T P, Hibberson W O. Raman Spectra of High-Pressure Polymorphs of SiO2 at Various Temperatures [J]. Phys Chem Miner, 1997, 24: 396-402.

Xu P C, Li R B, Wang Z H, et al. Raman Study of High-Pressure Metamorphic Coesite in the Central China [J]. Geology Science of the North-Western China, 1992, 13(2): 111-119. (in Chinese)

徐培苍, 李如璧, 王志海, 等. 华中高压变质柯石英的拉曼谱学研究 [J]. 西北地质科学, 1992, 13(2): 111-119.

Bohlen S R, Boettcher A L. The Quartz Coesite Transformation: A Precise Determination and the Effects of Other Components [J]. J Geophys Res, 1982, 87(B8): 7073-7078.

施引文献

资源附件(0)

访问统计