Infrared Properties of Magnesium Oxide

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of the American Ceramic Society Pub Date : 1965-07-01 DOI:10.1111/j.1151-2916.1965.tb14765.x

RINOUD HANNA

引用次数: 22

Abstract

The absorption spectrum of polycrystalline and single-crystal magnesium oxide was determined in the 4000 to 166 cm⁻¹ spectral region. In the range 4000 to about 1100 cm⁻¹, the absorption coefficient of the polycrystalline MgO was higher than that of the single-crystal MgO owing to scattering by the grain boundaries. This scattering decreased with increase of the grain diameter. No difference in reflectivity could be detected between the polycrystalline and single-crystal material in the 4000 to 300 cm^−lwave number region. The optical constants, n and k, were determined by the classical dispersion theory, assuming a single oscillator. From the maximum reflectivity, the resonance frequency was at 428 cm⁻¹; the value obtained from the acoustical vibration was at 475 cm⁻¹. The corresponding s factors were 0.64 and 0.72, respectively.

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氧化镁的红外特性

在4000 ~ 166 cm−1光谱范围内测定了氧化镁的多晶和单晶吸收光谱。在4000 ~ 1100 cm−1范围内，由于晶界的散射，多晶MgO的吸收系数高于单晶MgO。这种散射随晶粒直径的增大而减小。在4000 ~ 300 cm - l波数范围内，多晶材料和单晶材料的反射率没有差异。光学常数n和k由经典色散理论确定，假设有一个单振子。从最大反射率来看，谐振频率为428 cm−1;从声学振动得到的值为475 cm−1。相应的因子分别为0.64和0.72。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.