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]
Quick Facts 铪酸锶, 识别 ...
Close
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]
铪酸锶参杂某些金属(如铈),可以得到闪烁陶瓷粉体材料。[9]
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
- 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