SHEET-LIKE TITANATE MULTIPLE OXIDE PARTICLE AND ITS PREPARATION PROCESS,申请号JP20020252154-传众专利搜索

SHEET-LIKE TITANATE MULTIPLE OXIDE PARTICLE AND ITS PREPARATION PROCESS

申请公布号：JP2004091229(A)

申请号：JP20020252154

申请日期：2002.08.29

申请公布日期：2004.03.25

申请人：

HITACHI MAXELL LTD

发明人：SAWAKI HIROKO;KISHIMOTO MIKIO

分类号：C01G23/00;(IPC1-7):C01G23/00

主分类号：C01G23/00

摘要：PROBLEM TO BE SOLVED: To obtain a titanate multiple oxide particle of a particular shape which is especially suitable for a dielectric material, a piezoelectric material, an electrostrictive material, transparent ceramic, a high refractive index material, etc., and its preparation process. SOLUTION: A mixed aqueous solution of a titanium salt and at least one metal salt chosen from the group consisting of Sr, Ca, Ba and Pb is added to an aqueous alkaline solution to obtain a hydroxide or a hydrate of titanium and the metal element. The hydroxide or the hydrate is heat-treated at 110-300°C in the presence of water, filtered and dried to obtain the titanate multiple oxide particle. The obtained particle represented by the formula: ATiO<SB>3</SB>(wherein A is at least one metal element chosen from Sr, Ca, Ba and Pb) shows a good crystallinity and a sheet-like shape with an average particle size in the sheet surface direction of 1-30 nm. COPYRIGHT: (C)2004,JPO