鉿酸鍶

鉿酸鍶
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
熔點	2930 °C
折光度n; D	2.01
結構
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)₂·2H₂O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

[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): 295–300.

[3] Richard C. Ropp. Encyclopedia of the Alkaline Earth Compounds. Elsevier, 2013. pp 695

[4] AV. Kostrikin, FM Spiridonov, IV Lin'ko, et al. On Hydrated Strontium Hafnate. Russian Journal of Inorganic Chemistry, 2001. 46(5):639-641

[5] Lukin, E.S. & Soyuzova, A.Y. The synthesis, sintering, and properties of strontium hafnate. Refractories (1973) 14: 174. doi:10.1007/BF01286429

[6] 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

[7] 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

[8] 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

[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

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