查看“︁二硼化铪”︁的源代码

{{Chembox
|ImageFile=Magnesium-diboride-3D-balls.png
|Section1={{Chembox Identifiers
| CASNo=12007-23-7
| EC-number= 234-500-7
| PubChem          = 6336857}}
|Section2={{Chembox Properties
| Appearance= 灰色固体<ref name="Sigma" />
|Hf=1|B=2
| Density= 10.5&nbsp;g/cm³ (25 °C)<ref name="Sigma" />
| MeltingPt= 3100 °C<ref name="Sigma">{{Sigma-Aldrich|Aldrich|id=709204|Name=Hafnium boride, powder, −325 mesh, 99 % trace metals basis|Datum=2018-02-26}}</ref>

|BoilingPt=
| Solubility= 几乎不溶<ref name="Alfa">{{Alfa|43664|Name=Hafnium boride, 99.5% (metals basis excluding Zr), Zr &lt;2%|Datum=2018-02-26}}</ref>
}}
|Section8={{Chembox Related
|OtherCations=[[二硼化钛]]<br />[[二硼化锆]]
}}
}}

'''二硼化铪'''是一种[[无机化合物]]，为[[铪]]的一种[[硼化物]]，化学式 HfB<sub>2</sub>。其它铪的硼化物包括HfB和HfB<sub>12</sub>。<ref name="Eula Bingham, Barbara Cohrssen" />

== 制备 ==
二硼化铪可以由[[二氧化铪]]、[[碳]]和[[三氧化二硼]]或[[碳化硼]]反应而成。它也可以由[[四氯化铪]]、[[三氯化硼]]和[[氢气]]在2000 °C以上反应而成，或是铪和硼直接反应而成。<ref name="Eula Bingham, Barbara Cohrssen">{{cite book| author=Eula Bingham, Barbara Cohrssen | title=Patty's Toxicology  | publisher=John Wiley & Sons | ISBN=0-470-41081-7 | date=2012 | page=463 }}</ref>

:<chem>HfO2 + B2O3 + 5 C -> HfB2 + 5 CO</chem>

== 性质==
二硼化铪是一种不溶于水的灰色固体。<ref name="Alfa" />它会和[[氢氟酸]]反应，但在室温下对几乎可以抵御所有的试剂。<ref name="Eula Bingham, Barbara Cohrssen" />它在超过1500 °C的温度下才能被氧化。<ref name="Michael McNallan">{{cite book| author=Michael McNallan | title=High Temperature Corrosion and Materials Chemistry Proceedings of the Per Kofstad Memorial Symposium | publisher=The Electrochemical Society | ISBN=978-1-56677-261-7 | date=2000 | page=490 }}</ref>二硼化铪是[[六方晶系]]的，空间群 P6/mmm (No. 191)。<ref name="DOI10.1063/1.3647754">John W. Lawson, Murray S. Daw, Charles W. Bauschlicher: ''  Lattice thermal conductivity of ultra high temperature ceramics ZrB<sub>2</sub> and HfB<sub>2</sub> from atomistic simulations.'' In: ''Journal of Applied Physics.'' 110, 2011, S.&nbsp;083507, {{DOI|10.1063/1.3647754}}.</ref>

== 参考资料==
<references />
{{铪化合物}}
{{硼化物}}

[[Category:铪化合物]]
[[Category:硼化物]]
[[Category:中子毒物]]