GARNET FINE PARTICLE POWDER

PURPOSE:To provide rare earth-iron garnet fine particle powder having excellent corrosion resistance, large magnetic optical effect and excellent light transmittance and useful as a light isolator, light switch, etc., composed of a multicomposed oxide comprising a rare earth element, Bi, Fe, a metal...

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Bibliographische Detailangaben
Hauptverfasser:	ODAN KYOJI, FUJIMOTO TETSUYA
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING ELECTRICITY FREQUENCY-CHANGING INDUCTANCES INORGANIC CHEMISTRY MAGNETS METALLURGY NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TRANSFORMERS
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Beschreibung
Zusammenfassung:	PURPOSE:To provide rare earth-iron garnet fine particle powder having excellent corrosion resistance, large magnetic optical effect and excellent light transmittance and useful as a light isolator, light switch, etc., composed of a multicomposed oxide comprising a rare earth element, Bi, Fe, a metal selected from a specific metal group and oxygen and having a specific average particle size. CONSTITUTION:The subject rare earth-iron garnet (e.g. V1.5Bi1.5Fe4.2Al0.8O12) fine particle powder is represented by the formula RaBibFecMdOe (R is one kind or more of rare earth elements selected from Y and lanthanoid elements; M is one kind or more of elements selected from Al, Ga, Cr, Mn, Sc, In, Ru, Rh, Co, Fe (II), Cu, Ni, Zn, Li, Si, Ge, Zr, Ti, Hf, Sn, Pb, Mo, V and Nb; a+b+c+d=7.5-8.0; a+b=2.0-3.5; c+d=4.5-6.0; a=0.5-3.5; b=0-2.5; c=3.0-6.0; d=0-2.0; e is the number of oxygen atoms satisfied with the atomic valences of other elements) and has an average particle size of 30-1000Angstrom .