يان هندريك دى بور

في هذا article، لقب العائلة هو de Boer, not Boer.

Prof. dr. J. H. de Boer, 1947

يان هندريك دى بور ( Jan Hendrik de Boer ؛ 19 مارس 1899 – 25 أبريل 1971) was a Dutch physicist and chemist.

De Boer was born in Ruinen, De Wolden, and died in The Hague. He studied at the University of Groningen and was later employed in industry.

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 عمله

قضيب تيتانيوم مبلور (99.995%), manufactured via the Van Arkel-de Boer process.

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.

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.

 See also

• Metal–insulator transition
• Van Arkel–de Boer process

 References

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