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相転移

41 件の記事

P-T Diagram for SiO2, Low Quartz, α-quartz, has a trigonal crystal system, while High Quartz, β-quartz, has a hexagonal crystal system.

石英の相転移とセラミックス製造への影響

石英α-石英β-石英相転移
2026年8月10日続きを読む →
P-T Diagram for SiO2, Low Quartz, α-quartz, has a trigonal crystal system, while High Quartz, β-quartz, has a hexagonal crystal system.

石英の相転移とセラミックス製造への影響

石英α-石英β-石英相転移
2026年8月10日続きを読む →
Solid phase transitions which transform reversibly without passing through the liquid or gaseous phases are called enantiotropic. In contrast, if the modifications are not convertible under these conditions, the system is monotropic. Experimental data are used to differentiate between enantiotropic and monotropic transitions and energy/temperature semi-quantitative diagrams can be drawn by applying several rules, principally the heat-of-transition rule, the heat-of-fusion rule and the density rule. These rules enable the deduction of the relative positions of the H and G isobars in the E/T diagram. [1]

多形現象（ポリモーフィズム）の科学結晶構造の多様性と物性への影響

多形現象ポリモーフィズム結晶構造相転移
2026年8月10日続きを読む →
A phase diagram for a fictitious binary chemical mixture (with the two components denoted by A and B) used to depict the eutectic composition, temperature, and point. (L denotes the liquid state.)

共晶系（ユテクティック）の仕組みと産業利用融点降下が生み出す機能性材料

共晶系共晶点相図融点降下
2026年8月10日続きを読む →
P-T Diagram for SiO2

クリストバライト高温で形成されるシリカの多形鉱物

クリストバライトシリカ二酸化ケイ素多形
2026年8月10日続きを読む →
This diagram shows the nomenclature for the different phase transitions.

相転移のメカニズム物質の状態変化から生物学的現象まで

相転移状態変化相図臨界点
2026年8月10日続きを読む →
Schematic representation of a metamorphic reaction. Abbreviations of minerals: act = actinolite; chl = chlorite; ep = epidote; gt = garnet; hbl = hornblende; plag = plagioclase. Two minerals represented in the figure do not participate in the reaction, they can be quartz and K-feldspar. This reaction takes place in nature when a mafic rock goes from amphibolite facies to greenschist facies.

変成作用のメカニズムと岩石の分類地球内部で起こる物質の変容

変成作用原岩変成相広域変成作用
2026年8月10日続きを読む →
Ice cubes put in water will start to melt when they reach their melting point of 0 °C

融点（Melting Point）の科学物質の状態変化と測定のメカニズム

融点凝固点相転移熱力学
2026年8月10日続きを読む →
Littoral explosion at Waikupanaha ocean entry at the big island of Hawaii was caused by the lava entering the ocean

水蒸気爆発のメカニズムと危険性自然現象から産業事故まで

水蒸気爆発相転移ボイラー爆発燃料冷却材相互作用
2026年8月10日続きを読む →
For boiling to occur, the vapor pressure must exceed the ambient pressure plus a small amount of pressure induced by surface tension.

過熱（スーパーヒーティング）のメカニズムと危険性沸点を超えても沸騰しない現象

過熱スーパーヒーティング沸点メタ安定状態
2026年8月10日続きを読む →
Schematic equal-time spin correlation functions for ferromagnetic and antiferromagnetic materials both above and below T Curie {\displaystyle T_{\text{Curie}}} versus the distance normalized by the correlation length, ξ {\displaystyle \xi } . In all cases, correlations are strongest nearest to the origin, indicating that a spin has the strongest influence on its nearest neighbors. All correlations gradually decay as the distance from the spin at the origin increases. Above the Curie temperature, the correlation between spins tends to zero as the distance between the spins gets very large. In contrast, below T Curie {\displaystyle T_{\text{Curie}}} , the correlation between the spins does not tend toward zero at large distances, but instead decays to a level consistent with the long-range order of the system. The difference in these decay behaviors, where correlations between microscopic random variables become zero versus non-zero at large distances, is one way of defining short- versus long-range order.

相関関数統計力学における秩序と変動の定量的解析

相関関数統計力学臨界温度相転移
2026年8月10日続きを読む →
Water boiling at 99.3 °C (210.8 °F) at 215 m (705 ft) elevation

沸点とは何か？気圧による変化と化学的特性のメカニズム

沸点蒸気圧飽和温度気圧
2026年8月10日続きを読む →