A microcrystal method for the measurement of birefringence

Based on the interference principle, a special test process to measure polycrystalline birefringence was proposed and confirmed as an effective method for screening anisotropic micro-crystals. In this process, an innovative automatic mesh sieve was designed and applied to sieve the crystal particles...

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Bibliographic Details
Published inCrystEngComm Vol. 22; no. 11; pp. 1956 - 1961
Main Authors Cao, Liling, Peng, Guang, Liao, Wenbin, Yan, Tao, Long, Xifa, Ye, Ning
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 21.03.2020
Subjects
Aluminum oxide
Birefringence
Crystals
Interference
Microcrystals
Silicon dioxide
Thickness
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Summary:Based on the interference principle, a special test process to measure polycrystalline birefringence was proposed and confirmed as an effective method for screening anisotropic micro-crystals. In this process, an innovative automatic mesh sieve was designed and applied to sieve the crystal particles of Al 2 O 3 , SiO 2 , KDP, LBO and BBO. Each crystal was accurately divided into four thickness ranges of 23-38 μm, 38-53 μm, 53-90 μm, and 90-150 μm experimentally, and the polarization interference method was employed to measure the birefringence of the samples. Results showed that, when the thickness of the crystal particle was taken as the intermediate value of the mesh width in the range of 38-53 μm, the experimental value of the birefringence of the crystal particles on a small scale was closest to that of the large crystals. A scientifically valid test process to measure polycrystalline birefringence was proposed and confirmed as an effective method for screening anisotropic microcrystals.
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ISSN:1466-8033
1466-8033
DOI:10.1039/c9ce01934k