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結晶化

11 件の記事

A solvent (white) is added to a compound (orange). The slurry is heated to give a solution (orange). The solution is allowed to cool, ideally yielding crystals (orange), leaving impurities in solution (pale-orange).

再結晶による化合物の精製原理から高度な結晶成長法まで

再結晶精製結晶化溶媒
Figure 1: Calculate impurity profile after an infinite number of recycles as a function of the fraction of mother liquors reused

母液(マザーリカー)の基礎知識と結晶化プロセスにおける再利用の影響

母液マザーリカー結晶化過飽和
Solubility of Na2SO4 in water as a function of temperature.

過飽和溶液のメカニズムと科学的応用

過飽和溶解度結晶化核形成
Three nuclei on a surface, illustrating decreasing contact angles. The contact angle the nucleus surface makes with the solid horizontal surface decreases from left to right. The surface area of the nucleus decreases as the contact angle decreases. This geometrical effect reduces the barrier in classical nucleation theory and hence results in faster nucleation on surfaces with smaller contact angles. Also, if instead of the surface being flat it curves towards fluid, then this also reduces the interfacial area and so the nucleation barrier.

核形成(ニュークリエーション)のメカニズムと相転移の科学

核形成相転移過冷却均質核形成
Water dripping from a slab of ice and then freezing, forming icicles

凝固の科学液体が固体へと変化するメカニズムと生命への影響

凝固相転移結晶化過冷却
White veins in dark rock at Imperia, Italy

鉱脈(Vein)の形成メカニズムと地質学的意義

鉱脈地質学熱水循環オープンスペース充填
The equilibrium phase diagram of a solid solution of made up of mixtures of α and β. The upper curve is the line of liquidus, and the lower curve is the line of solidus.

液相線温度と固相線温度物質の融解挙動を決定する境界線

液相線温度固相線温度相図融点
The equilibrium phase diagram of a solid solution of made up of mixtures of α and β. The upper curve is the line of liquidus, and the lower curve is the line of solidus.

液相線温度と固相線温度物質の融解挙動を決定する境界線

液相線温度固相線温度相図融点
Snowflakes are a very well-known example, where subtle differences in crystal growth conditions result in different geometries.

結晶化のメカニズムと産業的応用理論から最新設備まで

結晶化核生成結晶成長過飽和
Crystals of amethyst quartz

結晶の科学微視的構造から多様な形態まで

結晶結晶構造結晶学準結晶
Snowflakes are a very well-known example, where subtle differences in crystal growth conditions result in different geometries.

結晶化のメカニズムと産業的応用理論からプロセスまで

結晶化核生成結晶成長過飽和