Objective: To explore the composition and microstructure of oyster shell. Methods: The composition of calcined oyster shell was analyzed by powder X-ray diffraction, and the microstructure of calcined oyster shell was observed by scanning electron microscope. Results: The XRD patterns of calcined oyster were consistent with the characteristic peaks of calcium carbonate PDF standard card 88-1807, silicon dioxide PDF standard card 85-0794 and calcium hydroxide PDF standard card 87-0673. Conclusion: The main component of calcined oyster shell is calcium carbonate, and contains trace amount of silicon dioxide and calcium hydroxide.
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