SINTESIS DAN KARAKTERISASI BORON KARBIDA DARI ASAM BORAT, ASAM SITRAT DAN KARBON AKTIF
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Abstract
Boron karbida merupakan material yang sulit terbentuk yang memiliki struktur dan aplikasi elektronik yang menarik. Beberapa kelebihan yang dimiliki oleh boron karbida antara lain stabil pada temperatur tinggi, memiliki tingkat kekerasan yang tinggi, berkemampuan tinggi dalam menyerap neutron pada pusat reaktor nuklir, dan memiliki sifat-sifat termoelektrik yang sangat baik. Kombinasi dari sifat-sifat tersebut memungkinkan boron karbida digunakan dalam berbagai aplikasi, termasuk material yang tahan abrasi, persenjataan militer, moderator neutron pada reaktor nuklir, dan berpotensial diaplikasikan pada pembangkit daya penerbangan angkasa luar. Penelitian ini berhasil mensintesis boron karbida dengan fasa B4C yang memiliki sistem Kristal rhombohedral, space grup m 3 R , dan parameter kisi a = b = 5,600, c = 12,08, α = β = γ = 900 dengan menggunakan bahan-bahan awal berupa asam borat (H3BO3), karbon
aktif, dan asam sitrat (C6H8O7) yang ditambahkan dengan magnesium sebagai koreduktor.
Boron carbide is highly refractory material that is of great interest for both it’s structural
and electronic properties. Of particular importance are it’s high-temperature stability,
high hardness, high cross-section for neutron capture, and excellent high-temperature
thermoelectric properties. This combination of properties gives rise to numerous applications, including uses as an abrasive wear-resistant material, ceramic armor, a neutron moderator in nuclear reactors, and potentially, for power generating deep space flight applications. This experimental succesfull to synthesis B4C boron carbide that has rhombohedral crystal system, space grup m 3 R , and lattice constant a = b = 5,600, c = 12,08, α = β = γ = 900 by using raw materials i.e. boric acid (H3BO3), activated carbon, and citric acid (C6H8O7) and magnesium as co-reductant.
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