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نتريد الألومنيوم (Info)


نتريد الألمنيوم هو مركب كيميائي له الصيغة AlN ، يكون في حالته النقية على شكل بلورات ذو لون أبيض مزرق، تكون لها رائحة الأمونياك في الهواء الرطب.

الخواص

  • يتفاعل نتريد الألمنيوم مع الماء محرراً غاز الأمونياك (النشادر)، بالإضافة إلى تشكل هيدروكسيد الألمنيوم حسب التفاعل
AlN + H2O → Al(OH)3 + NH3
  • يعد نتريد الألمنيوم من المركبات التي تمتاز بثباتيتها وقساوتها العالية (قساوتها 9 على مقياس موس Mohs )
  • الرابطة الكيميائية في مركب نتريد الألمنيوم ليست شاردية (أيونية) بالكامل، حيث تساهم الرابطة المشتركة (تكافؤية) في ارتباط هذا المركب.

التحضير

يحضر نتريد الألمنيوم من تمرير غاز النيتروجين الجاف على معدن الألمنيوم عند 800°س

2Al + N2 → 2AlN

الاستخدامات

  • نظراً لخصائصه الفيزيائية المميزة (معامل تمدد حراري صغير، ناقلية حرارية عالية، العزل الكهربائي) يستخدم نتريد الألمنيوم في التقنيات الكهربائية.
  • يستخدم كوسيلة للصقل.
Source: wikipedia.org
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