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c285003385铜虫 (小有名气)
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Aluminum titanate (Al2TiO5) is characterized by a low coefficient of thermal expansion, low modulus of elasticity, and low mechanical strength. These characteristics are mainly caused by the anisotropy of thermal expansion within the tialite crystals leading to localized internal stresses and microcracking during cooling from sintering temperature.3 Pure tialite tends to decompose to corundum and rutile in the temperature range between approx. 900 °C and 1280 °C. The decomposition rate depends on temperature, dwell time, heating rate, phase purity, grain size, and atmosphere.4 The thermal stability of metastable Al2TiO5 can be improved by suitable additives such as MgO which leads to the formation of Al2TiO5-MgTi2O5 solid solution during sintering.5 |
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木星之王
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c285003385: 金币+80, 翻译EPI+1, ★★★★★最佳答案, 很好 2015-04-22 22:22:22
c285003385: 金币+80, 翻译EPI+1, ★★★★★最佳答案, 很好 2015-04-22 22:22:22
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Aluminum titanate (Al2TiO5) is characterized by a low coefficient of thermal expansion, low modulus of elasticity, and low mechanical strength. 钛酸铝的热扩散系数，弹性模量以及力学强度都比较小。 These characteristics are mainly caused by the anisotropy of thermal expansion within the tialite crystals leading to localized internal stresses and microcracking during cooling from sintering temperature.3 这是因为钛酸铝晶体的热扩散是各项异性的，使得在从烧结温度冷却的过程中，晶体内部的应力集中形成微裂纹。 Pure tialite tends to decompose to corundum and rutile in the temperature range between approx. 900 °C and 1280 °C. 纯的钛酸铝在900到1280摄氏度的范围内容易分解成刚玉（氧化铝）跟金红石（氧化钛）。 The decomposition rate depends on temperature, dwell time, heating rate, phase purity, grain size, and atmosphere. 其分解速率与温度、持续时间、加热速率、相的纯度、晶粒尺寸以及周围气氛都有关。 The thermal stability of metastable Al2TiO5 can be improved by suitable additives such as MgO which leads to the formation of Al2TiO5-MgTi2O5 solid solution during sintering. 我们可以通过在钛酸铝中掺入氧化镁提高其热稳定性。这主要是由于在烧结过程中由于氧化镁的掺入形成了钛酸铝-钛酸镁的固溶体。 |
2楼2015-04-21 21:15:15
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