Editing Boron nitride (section)

===Preparation and reactivity of hexagonal BN===
Hexagonal boron nitride is obtained by the treating boron trioxide ({{chem2|B2O3}}) or boric acid ({{chem2|H3BO3}}) with [[ammonia]] ({{chem2|NH3}}) or [[urea]] ({{chem2|CO(NH2)2}}) in an inert atmosphere:<ref name=prod>{{cite journal | author = Rudolph, S. | journal = American Ceramic Society Bulletin | volume = 79 | year = 2000 | page = 50 | url = http://www.a-m.de/deu/literatur/cb0600.html | title = Boron Nitride (BN) | url-status = dead | archive-url = https://web.archive.org/web/20120306221940/http://www.a-m.de/deu/literatur/cb0600.html | archive-date = 2012-03-06}}</ref>

:{{chem2|B2O3 + 2 NH3 → 2 BN + 3 H2O}} (''T'' = 900&nbsp;°C)
:{{chem2|B(OH)3 + NH3 → BN + 3 H2O}} (''T'' = 900&nbsp;°C)
:{{chem2|B2O3 + CO(NH2)2 → 2 BN + CO2 + 2 H2O}} (''T'' > 1000&nbsp;°C)
:{{chem2|B2O3 + 3 CaB6 + 10 N2 → 20 BN + 3 CaO}} (''T'' > 1500&nbsp;°C)

The resulting disordered ([[amorphous solid|amorphous]]) material contains 92–95% BN and 5–8% {{chem2|B2O3}}. The remaining {{chem2|B2O3}} can be evaporated in a second step at temperatures {{nowrap|> 1500 °C}} in order to achieve BN concentration >98%. Such annealing also crystallizes BN, the size of the crystallites increasing with the annealing temperature.<ref name=dkg/><ref>{{cite web | url = http://hubacek.jp/bn/bn.htm | access-date = 2009-06-06 | title = Synthesis of Boron Nitride from Oxide Precursors | archive-url = https://web.archive.org/web/20071212115253/http://hubacek.jp/bn/bn.htm | archive-date = December 12, 2007 | url-status=dead}}</ref>

h-BN parts can be fabricated inexpensively by hot-pressing with subsequent machining. The parts are made from boron nitride powders adding boron oxide for better compressibility. Thin films of boron nitride can be obtained by [[chemical vapor deposition]] from [[borazine]].<ref>A. J. R. Payne, N. F. X. Jr, A. Tamtögl, M. Sacchi, Unravelling the Epitaxial Growth Mechanism of Hexagonal and Nanoporous Boron Nitride: A First-Principles Microkinetic Model. Small 2025, 2405404. https://doi.org/10.1002/smll.202405404</ref> [[ZYP Coatings (company)|ZYP Coatings]] also has developed boron nitride coatings that may be painted on a surface. Combustion of boron powder in nitrogen [[plasma (physics)|plasma]] at 5500&nbsp;°C yields [[Ultrafine particles|ultrafine]] boron nitride used for lubricants and [[toner (printing)|toner]]s.<ref>{{cite journal |author1=Paine, Robert T. |author2=Narula, Chaitanya K. | title = Synthetic Routes to Boron Nitride | journal = Chemical Reviews | year = 1990 | volume = 90 | pages = 73–91 | doi= 10.1021/cr00099a004}}</ref>

Boron nitride reacts with [[iodine monofluoride|iodine fluoride]] to give {{chem2|NI3}} in low yield.<ref>{{cite journal |author1=Tornieporth-Oetting, I. |author2=Klapötke, T. | journal = Angewandte Chemie International Edition | year = 1990 | volume = 29 | pages =677–679 | doi = 10.1002/anie.199006771 | title = Nitrogen Triiodide | issue = 6}}</ref>
Boron nitride reacts with nitrides of lithium, alkaline earth metals and lanthanides to form [[nitridoborate]]s.<ref name = "Housecroft2d">{{cite book |author1=Housecroft, Catherine E. |author2=Sharpe, Alan G. | year=2005 |title=Inorganic Chemistry|edition=2d |publisher=Pearson education|pages=318|isbn=978-0-13-039913-7}}</ref> For example:
:{{chem2|Li3N + BN → Li3BN2}}