| 词条 | Jan Hendrik de Boer |
| 释义 |
Jan Hendrik de Boer (19 March 1899 – 25 April 1971) was a Dutch physicist and chemist. De Boer was born in Ruinen, now De Wolden, and died in The Hague.[1] He studied at the University of Groningen and was later employed in industry. Together with Anton Eduard van Arkel, de Boer developed a chemical transport reaction for titanium, zirconium, and hafnium known as the crystal bar process. In a closed vessel the metal reacts with iodine at elevated temperature forming the iodide. At a tungsten filament of 1700 °C the reverse reaction occurs, and the iodine and the metal are set free. The metal forms a solid coating at the tungsten filament and the iodine can react with additional metal, resulting in a steady turnover.[2] M + 2I2 (>400 °C) → MI4 MI4 (1700 °C) → M + 2I2 De Boer became a member of the Royal Netherlands Academy of Arts and Sciences in 1940, and foreign member in 1947.[3] References1. ^CV {{Authority control}}{{DEFAULTSORT:Boer, Jan Hendrik de}}{{chemist-stub}}{{Netherlands-scientist-stub}}2. ^{{cite journal|title=Darstellung von reinem Titanium-, Zirkonium-, Hafnium- und Thoriummetall|journal=Zeitschrift für anorganische und allgemeine Chemie|volume=148|issue=1|year=1925|pages=345–350|first=A. E.|last=van Arkel|author2=de Boer, J. H.|doi=10.1002/zaac.19251480133}} 3. ^{{cite web|url=http://www.dwc.knaw.nl/biografie/pmknaw/?pagetype=authorDetail&aId=PE00003134|title=J.H. de Boer (1899 - 1971)|publisher=Royal Netherlands Academy of Arts and Sciences|accessdate=17 July 2015}} 7 : 1899 births|1971 deaths|People from De Wolden|Dutch chemists|Dutch scientists|Delft University of Technology faculty|Members of the Royal Netherlands Academy of Arts and Sciences |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。