为什么高压能让本来绝缘的物质变成金属，甚至让氢变成“金属氢”？
Why can high pressure turn an insulator metallic — even turning hydrogen into 'metallic hydrogen'?
加压把原子挤得更近，电子的能带展宽、价带与导带交叠，电子就能自由流动，于是绝缘体变导体。理论预言极高压下氢分子会解离成共价金属网络，就是金属氢。
Pressure squeezes atoms closer, broadening bands until the valence and conduction bands overlap so electrons flow freely — an insulator becomes a metal. Theory predicts that extreme pressure dissociates hydrogen molecules into a metallic covalent network: metallic hydrogen.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
E. Wigner 与 H. B. Huntington, 《On the Possibility of a Metallic Modification of Hydrogen》, Journal of Chemical Physics 3, 764 (1935)
E. Wigner & H. B. Huntington, 'On the Possibility of a Metallic Modification of Hydrogen', Journal of Chemical Physics 3, 764 (1935)
独立核验依据 · Independent verification: 核验依据 1 CROSSREF 标识 10.1063/1.1749590：On the Possibility of a Me
#金属化 #能带 #金属氢
为什么地心压力能把铁压成“固态”内核，尽管那里的温度比铁的熔点还高？
Why does Earth's core pressure keep iron solid despite temperatures above iron's melting point?
熔点本身会随压强升高而升高。地心约 360 万大气压把铁的熔点抬到比实际温度还高，于是铁在“本该熔化”的条件下反而被压成了固态内核。
The melting point rises with pressure. At Earth's core (~3.6 million atm) the melting point of iron is pushed above the actual temperature, so iron is squeezed into a solid inner core even though it would melt at that heat under low pressure.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-10-04
来源 · Source
P. W. Bridgman 著《The Physics of High Pressure》（高压物理学）
P. W. Bridgman, The Physics of High Pressure
独立核验依据 · Independent verification: 核验依据 1 ISBN 9780486627120 (1970)
#地核 #熔点 #压强
钻石压腔（金刚石对顶砧）怎么用两颗小钻石造出地心级别的压力？
How does a diamond anvil cell use two tiny diamonds to reach Earth's-core pressures?
把样品夹在两颗金刚石的尖之间，用螺旋使劲往里压。因为钻石极硬又顶尖很小，力集中到极小面积上，压强就能飙到上百万个大气压，足以模拟地心。
A sample is squeezed between the tips of two diamonds and pressed hard. Diamond is ultra-hard and the tips are tiny, so force concentrates on a minuscule area, driving pressure to millions of atmospheres — enough to mimic Earth's core.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-10-04
来源 · Source
P. W. Bridgman 著《The Physics of High Pressure》（高压物理学）
P. W. Bridgman, The Physics of High Pressure
独立核验依据 · Independent verification: 核验依据 1 ISBN 9780486627120 (1970)
#金刚石压腔 #压强 #集中
潜水越深耳朵越痛，每下潜大约 10 米增加多少大气压？
The deeper you dive, the more your ears hurt — about how much pressure per 10 meters down?
每下潜约 10 米，水柱就多压一个大气压，所以 10 米深约 2 个大气压（含原本的 1 个），30 米深就约 4 个。耳朵里的气囊被压扁，就会痛。
Roughly every 10 meters of water adds one atmosphere, so at 10 m you feel about 2 atm (including the 1 from air), and 4 atm at 30 m. The air spaces in your ears get squeezed, which hurts.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-10-04
来源 · Source
P. W. Bridgman 著《The Physics of High Pressure》（高压物理学）
P. W. Bridgman, The Physics of High Pressure
独立核验依据 · Independent verification: 核验依据 1 ISBN 9780486627120 (1970)
#水压 #大气压 #潜水