【摘要】 利用高温固相法以不同粒度的氢氧化铝为原料制备片状α-氧化铝。通过激光粒度分析仪、扫描电子显微镜及X射线衍射仪对产品进行了表征,得出了最佳制备工艺条件。结果表明,在最佳制备条件下制备的片状α-氧化铝粒度在20μm左右,径厚比为(5~8)∶1,大多为六角形片状。并首次提出了利用吸附-脱附等温线的重叠程度来表征片状氧化铝,可在片状氧化铝制备中应用。更多还原

【Abstract】 The flaky α-alumina is prepared by high-temperature solid phase method using aluminum hydroxide with different particle sizes as raw material.The products were characterized by laser particle size analyzer,scanning electron microscopy, and X-ray diffraction,and the optimum preparation conditions were determined.Result showed that flaky α-alumina under the optimum preparation conditions had the particle size about 20 μm,diameter to thickness ratio of(5~8)∶1,and most of hexagonal flakes.And the degree of overlap of adsorption-desorption isotherms to characterize flaky alumina was first used in its preparation.更多还原