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硼酸镁晶须
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硼酸镁晶须
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工学
无机晶须新材料
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magnesium borate whisker
硼酸镁晶须
分子式为Mg2B2O5,相对分子质量为150.23。外观为白色蓬松状固体,显微镜下为纤维状单晶体,在扫描电镜显微镜下观察硼酸镁晶须长度为10~50微米、直径0.5~20微米,相对密度为2.91,莫氏硬度为5.5;熔点为1360℃,耐热温度为1000℃;拉伸强度为3.92吉帕,弹性模量为264.6;热膨胀速率18×10-6/℃(平行纤维轴),(2~10)×10-6/℃(垂直纤维轴)。又称焦硼酸镁晶须。
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predicate logic
predicate logic of first order
predicate logic of higher order
predicate logic of second order
predicate logic with equality
predicate modification rule
predicate of first level
predicate of first order
predicate of n arguments
predicate of n variables
predicate of second level
predicate of second order
predicate symbol
predicate transformer
predicate transformer semantics
predicate/transition system
predicate variable
predicate word
predicative
predicative analysis
predicative definition
predicative formal theory
predicative ordinal number
predicative property
predicative proposition
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