Magnesium oxide particle aggregate

A particle aggregation, magnesia technology, applied in magnesia, furnace type, furnace, etc., can solve problems such as insufficient reaction
CN1427899AInactive Publication Date: 2003-07-02TATEHO CHEM IND CO
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TATEHO CHEM IND CO
Publication Date
2003-07-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

An object of the present invention is to provide a magnesium oxide particle aggregate having a controlled particle aggregation structure so that the solid phase-solid phase reaction between magnesium oxide and the SiO2 film on the surface can be appropriately controlled. The object can be achieved by a magnesium oxide particle aggregate characterized in that a first inflection point diameter is 0.30 x 10<-6> m or less, an interparticle void volume is 1.40 x 10<-3> to 2.20 x 10<-3> m<3> / kg and a particle void volume is 0.55 x 10<-3> to 0.80 x 10<-3> m<3> / kg in a cumulative intrusion volume curve of the particle aggregate.
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Description

technical field

[0001] The present invention relates to an aggregate of magnesium oxide particles for controlling particle aggregation structure, and in particular, relates to an aggregate of magnesium oxide particles for an annealing separator that forms a forsterite thin film that imparts excellent insulating properties and magnetic properties to a grain-oriented electrical steel sheet. Background technique

[0002] The grain-oriented electrical steel sheets used in transformers and generators are generally processed by hot-rolling silicon steel containing about 3% Si, then cold-rolling to the final plate thickness, and then decarburization annealing (primary recrystallization annealing), finishing annealing and other processes made. At this time, in order to impart insulation to the electrical steel sheet, a slurry containing magnesia is applied to the surface of the steel sheet after decarburization annealing, dried, wound into a coil, and then final finish annealing is ...

Claims

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