PREPARATION OF FINE PARTICLE OF BI2TI2O7

PURPOSE:To obtain the titled fine particles having uniform particle size distribution, little variation of composition, and high purity in high yield without requiring heat-treatment, by allowing a hydrolyzed product of a Ti compd. etc., with a water-soluble Bi compd. to react by the wet process und...

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Hauptverfasser:	KAMIHIRA AKIRA, YAMANOI HIROSHI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS INORGANIC CHEMISTRY METALLURGY
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain the titled fine particles having uniform particle size distribution, little variation of composition, and high purity in high yield without requiring heat-treatment, by allowing a hydrolyzed product of a Ti compd. etc., with a water-soluble Bi compd. to react by the wet process under a specified pH and specified temp. CONSTITUTION:A hydrolyzed product of a Ti compd. or a water-soluble Ti compd. (e.g. TiCl4) is mixed with a water-soluble Bi compd. (e.g. BiCl3) in 0.2-0.7 molar ratio of Bi/Ti, and the mixture is dissolved in water. Alkali such as KOH is added to the aq. soln. to prepare aq. soln. of strong alkali having >=12.0pH, which is subjected to wet reaction at >=220 deg.C in an autoclave, etc. The reaction product is washed with water, filtered and dried.