鉿酸鍶
鉿酸鍶 | |
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英文名 | Strontium hafnate |
識別 | |
CAS號 | 12029-24-2 ![]() |
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 | |
晶體結構 | 鈣鈦礦[3] |
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)2·2H2O和SrCO3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HfO2,Sr(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的硝酸和氫氟酸清洗。[6]鉿酸鍶的薄膜還可以通過Hf對SrO2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(如鈰),可以得到閃爍陶瓷粉體材料。[9]
參考文獻
- ^ 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
- ^ 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, W., Li, P., Dong, H. et al. Y2O3 and Yb2O3 Co-doped Strontium Hafnate as a New Thermal Barrier Coating Material (頁面存檔備份,存於互聯網檔案館). J Therm Spray Tech (2014) 23: 154. doi:10.1007/s11666-013-0006-9
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