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铪酸锶

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铪酸锶
英文名 Strontium hafnate
识别
CAS号 12029-24-2  checkY
PubChem 20633930(结构错误)
SMILES
 
  • [Sr+2].[O-]Hf(=O)[O-]
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[3]
晶体结构 钙钛矿
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)2·2H2OSrCO3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HfO2Sr(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的硝酸氢氟酸清洗。[6]铪酸锶的薄膜还可以通过HfSrO2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

铪酸锶参杂某些金属(如),可以得到闪烁陶瓷粉体材料。[9]

参考文献

  1. ^ 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. 
  2. ^ 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 (1-2): 295–300. doi:10.1016/j.jallcom.2004.03.113. 
  3. ^ Ye, Tiannan; Dong, Zhenghong; Zhao, Yongnan; Yu, Jianguo; Wang, Fengqin; Zhang, Lingling; Zou, Yongcun. Rationally fabricating hollow particles of complex oxides by a templateless hydrothermal route: The case of single-crystalline SrHfO3 hollow cuboidal nanoshells. Dalton Transactions. 2011, 40 (11): 2601 – 2606. doi:10.1039/C0DT01354D. 
  4. ^ Kostrikin A.V.; Spiridonov F.M.; Lin'ko I.V.; et al. On Hydrated Strontium Hafnate. Russian Journal of Inorganic Chemistry. 2001, 46 (5): 639–641 [2024-11-22]. (原始内容存档于2024-09-09). 
  5. ^ Lukin, E. S.; Soyuzova, A. Ya. The synthesis, sintering, and properties of strontium hafnate. Refractories. 1973, 14 (3-4): 174–180. ISSN 0034-3102. doi:10.1007/BF01286429. 
  6. ^ Schreckenbach, J.P; Meyer, N; Marx, G; Lee, B.T; Kriven, W.M. Strontium hafnate phases by anodic spark conversion. Applied Surface Science. 2003, 205 (1-4): 97–101. doi:10.1016/S0169-4332(02)01039-5. 
  7. ^ McCarthy, I.; Agustin, M.P.; Shamuilia, S.; Stemmer, S.; Afanas'ev, V.V.; Campbell, S.A. Strontium hafnate films deposited by physical vapor deposition. Thin Solid Films. 2006, 515 (4): 2527–2530. doi:10.1016/j.tsf.2006.07.030. 
  8. ^ Black, K.; Werner, M.; Rowlands–Jones, R.; Chalker, P.R.; Rosseinsky, M.J. SrHfO3 Films Grown on Si(100) by Plasma-Assisted Atomic Layer Deposition.. Chemistry of Materials. 2011-05-24, 23 (10): 2518–2520. ISSN 0897-4756. doi:10.1021/cm200315u. 
  9. ^ 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, Wen; Li, Peng; Dong, Hongying; Bai, Yu; Zhao, Jinlan; Fan, Xiaoze. Y2O3 and Yb2O3 Co-doped Strontium Hafnate as a New Thermal Barrier Coating Material. Journal of Thermal Spray Technology. 2014, 23 (1-2): 154–159. ISSN 1059-9630. doi:10.1007/s11666-013-0006-9.