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Hitachi Ltd
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Hitachi Ltd
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Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to JP5533477ApriorityCriticalpatent/JPS53141199A/en
Publication of JPS53141199ApublicationCriticalpatent/JPS53141199A/en
PURPOSE:To provide the subject process comprising imparting a temperature gradient to a supersaturated solution of polyphosphoric acid flux relative to ultraphosphate to cause a mass flow, whereby a sheet crystal and an aculeate crystal having a long axis in the temperature gradient direction, having a comparatively large area and a high quality can be produced with good reappearance.
JP5533477A1977-05-161977-05-16Process for producing ultraphosphoric acid crystal
PendingJPS53141199A
(en)