铪酸锶
| 铪酸锶 | |
|---|---|
| |
| 英文名 | Strontium hafnate |
| 识别 | |
| CAS号 | 12029-24-2 
|
| InChIKey | RNFADRXKYVCNTI-UHFFFAOYSA-N |
| 性质 | |
| 化学式 | SrHfO3 |
| 摩尔质量 | 314.113（无水） 350.145（二水） g·mol⁻¹ |
| 外观 | 玻璃或陶瓷状固体 |
| 密度 | 7.6 g/cm3[1] |
| 熔点 | 2930 °C [2] |
| 折光度n D |
2.01 |
| 结构 | |
| 晶体结构 | 钙钛矿[3] |
| 空间群 | 62 |
| 晶格常数 | a = 5.793 Å, b = 8.188 Å, c = 5.785 Å (25 °C) |
| 若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。 | |
铪酸锶是一种无机化合物，化学式为SrHfO3，存在无水物和二水合物。[4]
制备
铪酸锶可以HfO(NO3)2·2H2O和SrCO3为原料制备。先将硝酸盐溶于水，按化学计量比加入SrCO3，在水中，HfO(NO3)2发生水解：
- HfO(NO3)2 + 2 H2O → Hf(OH)4 + 2 HNO3
水解产生的HNO3作用于SrCO3：
- 2 HNO3 + SrCO3 → Sr(NO3)2 + H2O + CO2↑
最后，将溶液蒸干，在高温下，Hf(OH)4分解为HfO2，Sr(NO3)2先分解为Sr(NO2)2，然后进一步分解为SrO，高于700℃时，两者反应，得到产物SrHfO3：[5]
- SrO + HfO2 → SrHfO3
铪酸锶也可以通过在电化学电池中的阳极转换反应制备，所用电压高达210V，电极温度控制在300 K。铪箔未沉积的部分需要用1:1的硝酸和氢氟酸清洗。[6]铪酸锶的薄膜还可以通过Hf对SrO2靶的气相沉积来制备。[7]在Si(100)底物上的等离子气相沉积也能够制得产物，反应中用(MeCp)2Hf(OMe)将会提高生长速率。[8]
用途
参考文献
- ^ Feteira, Antonio; Sinclair, Derek C.; Rajab, Khalid Z.; Lanagan, Michael T. Crystal Structure and Microwave Dielectric Properties of Alkaline-Earth Hafnates, AHfO3 (A=Ba, Sr, Ca). Journal of the American Ceramic Society. 2008, 91 (3): 893 – 901. doi:10.1111/j.1551-2916.2007.02134.x.
- ^ Yamanaka, Shinsuke; Maekawa, Takuji; Muta, Hiroaki; Matsuda, Tetsushi; Kobayashi, Shin-ichi; Kurosaki, Ken. Thermal and mechanical properties of SrHfO3. Journal of alloys and compounds. 2004, 381 (1): 295–300.
- ^ Richard C. Ropp. Encyclopedia of the Alkaline Earth Compounds. Elsevier, 2013. pp 695
- ^ AV. Kostrikin, FM Spiridonov, IV Lin'ko, et al. On Hydrated Strontium Hafnate. Russian Journal of Inorganic Chemistry, 2001. 46(5):639-641
- ^ Lukin, E.S. & Soyuzova, A.Y. The synthesis, sintering, and properties of strontium hafnate. Refractories (1973) 14: 174. doi:10.1007/BF01286429
- ^ J.P Schreckenbach, N Meyer, G Marx, et al. Strontium hafnate phases by anodic spark conversion. Applied Surface Science, 2003. 205 (1-4): 97-101
- ^ I. McCarthy, M.P. Agustin, S. Shamuilia, et al. Strontium hafnate films deposited by physical vapor deposition. Thin Solid Films, 2006. 515(4): 2527-2530
- ^ K. Black, M. Werner, R. Rowlands–Jones, et al. SrHfO3 Films Grown on Si(100) by Plasma-Assisted Atomic Layer Deposition. Chem. Mater., 2011. 23(10): 2518-2520
- ^ 刘亚慧, 柏朝晖. 碱土铪酸盐闪烁陶瓷粉体的制备与表征. 化学工程与装备, 2009(10):33-35
拓展阅读
- Red'ko, V.P.; Shevchenko, A.V.; Lopato, L.M. Polimorfizm gafnata i tsirkoniya strontsiya [Polymorphism of strontium hafnate and zirconate]. Izvestiya Akademii Nauk SSSR, Neorganicheskie Materialy, 1988. 24(12): 2027-2030
- Ma, W., Li, P., Dong, H. et al. Y2O3 and Yb2O3 Co-doped Strontium Hafnate as a New Thermal Barrier Coating Material （页面存档备份，存于互联网档案馆）. J Therm Spray Tech (2014) 23: 154. doi:10.1007/s11666-013-0006-9
| |||||||
| |||||||||||||||||
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.
Cover photo is available under {{::mainImage.info.license.name || 'Unknown'}} license.
Cover photo is available under {{::mainImage.info.license.name || 'Unknown'}} license.
Credit:
(see original file).
