查看“︁铀氮化物”︁的源代码

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'''氮鈾化物'''，是[[核燃料循环|核燃料循環]]中重要的[[燃料]]。典型的氮鈾化物由一氮化鈾(UN)、三氮化二鈾(U<sub>2</sub>N<sub>3</sub>)及二氮化鈾(UN<sub>2</sub>)組成。<ref>{{cite journal|journal=Inorganic Chemistry|volume=54|issue=1|language=en|issn=0020-1669|date=2015-01-05|pages=293–298|doi=10.1021/ic502457n|url=https://pubs.acs.org/doi/10.1021/ic502457n|title=Synthesis of Phase-Pure U 2 N 3 Microspheres and Its Decomposition into UN|accessdate=2022-05-28|author=Chinthaka M. Silva, Rodney D. Hunt, Lance L. Snead, Kurt A. Terrani|archive-date=2022-05-28|archive-url=https://web.archive.org/web/20220528035814/https://pubs.acs.org/doi/10.1021/ic502457n}}</ref>

==一氮化鈾==
===簡介===
一氮化铀（UN），黄褐色或灰色晶体，[[立方晶系]]氯化钠型结构。[[相对密度]]14.31。熔点2630±50&nbsp;°C。铀和氮加热至400&nbsp;°C时产生的是一氮化铀、[[三氮化二铀]]和[[二氮化铀]]的混合物。基於其具有高熔點、密度和熱導率等﹐用作[[核燃料]]。<ref name = a>{{cite journal|title=铀氮化物晶体结构及电子结构|date=2018-12-15|doi=10.7536/PC180303|language=zh|journal=化学进展|volume=30|issue=12|pages=1803|issn=1005-281X|url=https://manu56.magtech.com.cn/progchem/CN/10.7536/PC180303|accessdate=2022-05-28|author=Yin Hu Xiaofang Wang, 胡殷 王晓方}}</ref>
===製取===
把鈾放在氫氣中，生成三氫化鈾，最適温度為225°C<br>
<chem> 4U + 6H2 -> 4UH3 </chem><br><br>
再將氫化物置於氮氣中，生成三氮化二鈾。注意，此反應為放出大量熱。<br>
<chem> 4 UH3 + 3 N2 -> 2 U2N3 + 6H2</chem><br><br>
最後，三氮化二鈾可在900°C或以上的真空環境或1200°C或以上的惰性氣體環境被[[反硝化反应|脫氮]]還原，生成一氮化鈾<ref>{{cite book|title =The manufacturing of uranium nitride for possible use in light water reactors|author = P Malkki | ISBN= 978-91-7595-617-6}}</ref><br>
<chem> 2 U2N3 -> 4UN + N2</chem>
==三氮化二鈾==
{{chembox
| Name = 三氮化二铀<ref>{{cite journal
| title = Fabrication and testing of uranium nitride fuel for space power reactors
| url = https://archive.org/details/sim_journal-of-nuclear-materials_1988-02_151_3/page/345
| author = R. B. Matthews, K. M. Chidester, C. W. Hoth, R. E. Mason, R. L. Petty
| journal = Journal of Nuclear Materials | volume = 151 | issue = 3| year = 1988
| pages = 345| doi = 10.1016/0022-3115(88)90029-3}}</ref>
| IUPACName = Uranium nitride
| ImageFile=La2O3structure.svg
| Section1 = {{Chembox Identifiers
| CASNo = 12033-83-9
| CASNo_Ref = {{cascite|correct|??}}
}}
| Section2 = {{Chembox Properties
|   Formula = U<sub>2</sub>N<sub>3</sub>
|   MolarMass = 518.078
|   Appearance = 结晶状固体
|   Density = 11300 kg m-3（固体）
|   Solubility = 0.08 g/100 ml (20&nbsp;°C)
|   MeltingPt = 900&nbsp;°C（分解成UN）
|   BoilingPt = 分解
 }}
| Section3 = {{Chembox Structure
|   CrystalStruct = 六角形，[[Pearson symbol|hP5]]
|   SpaceGroup = P-3m1, No. 164
 }}
}}

== 参考文献 ==
{{reflist}}

{{铀化合物}}
{{氮化物}}

[[Category:三价鈾化合物]]
[[Category:氮化物]]