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Energetics of X-ray-amorphous zirconia and the role of surface energy in its formation

机译:X射线非晶态氧化锆的能量学及其表面能在其形成中的作用

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X-ray-amorphous zirconia was synthesized by a low temperature process. The difference in the energetics of monoclinic and amorphous zirconia was calculated based on drop solution calorimetry of amorphous and monoclinic zirconia in lead berate (2PbO . B2O3) at 1073 K. X-ray-amorphous zirconia is about 58 kJ/mol less stable in enthalpy than the monoclinic phase. Amorphous zirconia healed to 573 K shows crystalline nanoparticles (cubic or tetragonal) of 3.8 nm average diameter. Formation of amorphous zirconia at low temperatures can be explained by its surface energy stabilization relative to monoclinic zirconia, with a difference Delta sigma similar to 1.19 +/- 0.08 J/m(2). (C) 2000 Elsevier Science B.V. All rights reserved. [References: 20]
机译:通过低温工艺合成了X射线非晶态氧化锆。基于在1073 K时在Berate铅(2PbO。B2O3)中非晶态和单斜晶氧化锆的液滴溶液量热法,计算了单斜晶和无定形氧化锆的能量学差异。X射线非晶态氧化锆的焓稳定性降低了58 kJ / mol。比单斜相治愈至573 K的非晶态氧化锆显示平均直径为3.8 nm的结晶纳米颗粒(立方或四方晶)。非晶态氧化锆在低温下的形成可以用其相对于单斜晶氧化锆的表面能稳定来解释,其差值Δσ类似于1.19 +/- 0.08 J / m(2)。 (C)2000 Elsevier Science B.V.保留所有权利。 [参考:20]

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