Nucleation, or the formation of a crystalline phase from the liquid st terjemahan - Nucleation, or the formation of a crystalline phase from the liquid st Bahasa Indonesia Bagaimana mengatakan

Nucleation, or the formation of a c

Nucleation, or the formation of a crystalline phase from the liquid state, is probably the most important factor in controlling crystallization.
The nucleation rate is the major determining factor in the number and size of crystals formed, their polymorphic form, and the ultimate distribution of crystalline solids.
Crystallization cannot occur until the phase is supersaturated or subcooled.
However, attaining the supersaturated or subcooled state is not necessarily sufficient to promote crystallization because a certain energy barrier exists to formation of nuclei.
A nucleus is the smallest crystal that can exist in a solution at a certain temperature.
The formation of a nucleus from the liquid phase, or the nucleation process, requires the molecules to organize into a crystal lattice.
There is a free-energy barrier opposing this transition, but when nucleation does occur, there is a release of energy (latent heat of fusion) as the molecules assume the lower energy state in the crystal lattice.
Based on these energy considerations, a free-energy maximum exists that must be overcome for nucleation to occur (24).
At this maximum free energy, there is a critical size for a stable nucleus.
Above this critical size, a stable nucleus is formed that continues to grow, whereas clusters smaller than the critical size can potentially disperse into the liquid state
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Hasil (Bahasa Indonesia) 1: [Salinan]
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Nucleation, or the formation of a crystalline phase from the liquid state, is probably the most important factor in controlling crystallization.
The nucleation rate is the major determining factor in the number and size of crystals formed, their polymorphic form, and the ultimate distribution of crystalline solids.
Crystallization cannot occur until the phase is supersaturated or subcooled.
However, attaining the supersaturated or subcooled state is not necessarily sufficient to promote crystallization because a certain energy barrier exists to formation of nuclei.
A nucleus is the smallest crystal that can exist in a solution at a certain temperature.
The formation of a nucleus from the liquid phase, or the nucleation process, requires the molecules to organize into a crystal lattice.
There is a free-energy barrier opposing this transition, but when nucleation does occur, there is a release of energy (latent heat of fusion) as the molecules assume the lower energy state in the crystal lattice.
Based on these energy considerations, a free-energy maximum exists that must be overcome for nucleation to occur (24).
At this maximum free energy, there is a critical size for a stable nucleus.
Above this critical size, a stable nucleus is formed that continues to grow, whereas clusters smaller than the critical size can potentially disperse into the liquid state
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Hasil (Bahasa Indonesia) 2:[Salinan]
Disalin!
Nukleasi, atau pembentukan fase kristal dari keadaan cair, mungkin adalah faktor yang paling penting dalam mengontrol kristalisasi.
Tingkat nukleasi adalah faktor utama yang menentukan jumlah dan ukuran kristal yang terbentuk, bentuk polimorfik mereka, dan distribusi utama padatan kristal.
Kristalisasi tidak dapat terjadi sampai fase tersebut jenuh atau subcooled.
Namun, mencapai keadaan jenuh atau subcooled belum tentu cukup untuk mempromosikan kristalisasi karena penghalang energi tertentu ada untuk pembentukan inti.
Sebuah inti adalah kristal kecil yang bisa eksis dalam solusi pada suhu tertentu.
Pembentukan inti dari fase cair, atau proses nukleasi, membutuhkan molekul untuk mengatur ke dalam kisi kristal.
Ada hambatan-energi bebas menentang transisi ini, tetapi ketika nukleasi terjadi, ada adalah pelepasan energi (panas laten fusi) sebagai molekul menganggap keadaan energi yang lebih rendah dalam kisi kristal.
Berdasarkan pertimbangan energi ini, maksimum energi bebas ada yang harus diatasi untuk nukleasi terjadi (24).
Pada saat ini energi bebas maksimum, ada ukuran penting untuk inti yang stabil.
Di atas ukuran kritis ini, inti yang stabil terbentuk yang terus berkembang, sedangkan kelompok yang lebih kecil dari ukuran kritis berpotensi dapat menyebar ke dalam keadaan cair
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