A solid material useful for producing hexagonal ferrites comprises a homogeneous mixture of the cations of the composition (I) and one or more anions comprising one or more thermally decomposable anions.

A method for producing shaped bodies from hard ferrites, includes (a) providing a powder of hard ferrite material having a fine particle size; (b) adding to the powder a plastifying and bonding agent which comprises (a) at least one of cyclododecane, cyclododecanol, and stearyl alcohol and (b) stearic acid to provide a mixture; (c) shaping the mixture into a blank; (d) heating at a temperature effective to remove the plastifying and bonding agent from the blank; and (e) subsequently heating the ...

A low power loss Mn-Zn ferrite consists essentially of Fe.sub.2 O.sub.3, MnO and ZnO at a given mole ratio and contains given amounts of SiO.sub.2, CaO, niobium oxide and titanium oxide or antimony oxide as trace additives. This ferrite is suitable as a transformer material for switched mode power supply.

A process for the preparation by electrodeposition of metal oxide film and powder compounds for ferroelectric memory materials and ferrites wherein the metal oxide includes a plurality of metals. The process comprises providing an electrodeposition bath, providing soluble salts of the metals to this bath, electrically energizing the bath to thereby cause formation of a recoverable film of metal on the electrode, recovering the resultant film as a film or a powder, and recovering powder formed on...

A low power loss Mn-Zn ferrite consists essentially of Fe.sub.2 O.sub.3, MnO and ZnO at a given mole ratio and contains given amounts of SiO.sub.2, CaO, niobium oxide and titanium oxide or antimony oxide as trace additives. This ferrite is suitable as a transformer material for switched mode power supply.

A U, W, X, Y, or Z-type hexagonal ferrite and method for making such a fete are disclosed. The hexagonal ferrite has a formula as follows: According to the method, the required weights of the oxides and carbonates are measured and then pulverized and mixed to form a material which is sintered in air. This material is then cooled to produce the U, W, X, Y, or Z-type hexagonal ferrite.

A pearlescent pigment comprises (a) synthetic mica substrate, (b) calcined ferrite coating on the substrate, and (c) an outer layer or treatment wherein said outer layer or treatment was added to the calcined ferrite coated synthetic mica in water.The pearlescent pigment may be used in exterior applications such as automotive paint systems.

M-Type ferrites of the formula AFe.sub.12 O.sub.19, Me.sub.2 Y-type ferrites of the formula A.sub.2 Me.sub.2 Fe.sub.12 O.sub.22 or spinel-type ferrites of the formula MeFe.sub.2 O.sub.4, where A is Ba, Sr, Pb and/or Ca and Me is Zn, Mn, Co, Cu, Fe(II) and/or 1/2(Li(I)+Fe(III)), are prepared by a process wherein iron(II) sulfate hydrate is dehydrated and oxidized and then mixed with sodium carbonate and/or potassium carbonate and salts and/or oxides of other A and/or Me cations required in additi...

The present invention relates to a method for producing a large single crystal of a mixed ferrite containing ZnO and having a spinel structure by melting the raw materials under an oxygen atmosphere with a pressure of from 1.5 to 20 atmospheres at a temperature of from 1,600.degree. to 1,800.degree.C to reduce the amount of ferrous ion contained in the molten ferrite to less than 7 wt. percent, and cooling the molten ferrite at the rate of from 2.degree. to 8.degree.C/hour to carry out the cryst...

An NiCuZn-base ferrite of the invention comprises as main components an iron oxide in an amount of 45.0 to 49.0 mol % on Fe.sub.2O.sub.3 basis, an copper oxide in an amount of 5.0 to 14.0 mol % on CuO basis and a zinc oxide in an amount of 1.0 to 32.0 mol % on ZnO basis with a nickel oxide accounting for the rest mol % on NiO basis. With respect to the main components, a bismuth oxide is contained in an amount of 0.25 exclusive to 0.40% by weight on Bi.sub.2O.sub.3 basis, and a tin oxide is cont...