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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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