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鉿酸鍶

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鉿酸鍶
英文名 Strontium hafnate
識別
CAS號 12029-24-2  checkY
PubChem 20633930(結構錯誤)
SMILES
 
  • [Sr+2].[O-]Hf(=O)[O-]
InChIKey RNFADRXKYVCNTI-UHFFFAOYSA-N
性質
化學式 SrHfO3
摩爾質量 314.113(無水)
350.145(二水) g·mol⁻¹
外觀 玻璃或陶瓷狀固體
密度 7.6 g/cm3[1]
熔點 2930 °C [2]
折光度n
D
2.01
結構[3]
晶體結構 鈣鈦礦
空間群 62
晶格常數 a = 5.793 Å, b = 8.188 Å, c = 5.785 Å (25 °C)
若非註明,所有數據均出自標準狀態(25 ℃,100 kPa)下。

鉿酸鍶是一種無機化合物,化學式為SrHfO3,存在無水物和二水合物。[4]

製備

鉿酸鍶可以HfO(NO3)2·2H2OSrCO3為原料製備。先將硝酸鹽溶於水,按化學計量比加入SrCO3,在水中,HfO(NO3)2發生水解:

HfO(NO3)2 + 2 H2O → Hf(OH)4 + 2 HNO3

水解產生的HNO3作用於SrCO3

2 HNO3 + SrCO3 → Sr(NO3)2 + H2O + CO2

最後,將溶液蒸乾,在高溫下,Hf(OH)4分解為HfO2Sr(NO3)2先分解為Sr(NO2)2,然後進一步分解為SrO,高於700℃時,兩者反應,得到產物SrHfO3[5]

SrO + HfO2 → SrHfO3

鉿酸鍶也可以通過在電化學電池中的陽極轉換反應製備,所用電壓高達210V,電極溫度控制在300 K。鉿箔未沉積的部分需要用1:1的硝酸氫氟酸清洗。[6]鉿酸鍶的薄膜還可以通過HfSrO2靶的氣相沉積來製備。[7]在Si(100)底物上的等離子氣相沉積也能夠製得產物,反應中用(MeCp)2Hf(OMe)將會提高生長速率。[8]

用途

鉿酸鍶參雜某些金屬(如),可以得到閃爍陶瓷粉體材料。[9]

參考文獻

  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. 
  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. ^ 劉亞慧, 柏朝暉. 鹼土鉿酸鹽閃爍陶瓷粉體的製備與表徵. 化學工程與裝備, 2009(10):33-35

拓展閱讀

  • 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.