ES472370A1 - Stabilizing of viscosity of aqueous magnesia slurry and increasing concentration thereof - Google Patents

Stabilizing of viscosity of aqueous magnesia slurry and increasing concentration thereof

Info

Publication number
ES472370A1
ES472370A1 ES472370A ES472370A ES472370A1 ES 472370 A1 ES472370 A1 ES 472370A1 ES 472370 A ES472370 A ES 472370A ES 472370 A ES472370 A ES 472370A ES 472370 A1 ES472370 A1 ES 472370A1
Authority
ES
Spain
Prior art keywords
mgo
viscosity
suspension
phosphate
stabilizing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
ES472370A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Armco Inc
Original Assignee
Armco Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Armco Inc filed Critical Armco Inc
Publication of ES472370A1 publication Critical patent/ES472370A1/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
    • C23D5/00—Coating with enamels or vitreous layers
    • C23D5/10—Coating with enamels or vitreous layers with refractory materials
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
    • C21D1/70—Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H01F1/14766—Fe-Si based alloys
    • H01F1/14775—Fe-Si based alloys in the form of sheets
    • H01F1/14783—Fe-Si based alloys in the form of sheets with insulating coating

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Dispersion Chemistry (AREA)
  • Power Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Fertilizers (AREA)

Abstract

Method of stabilising the viscosity and increasing the concn. of an aq. suspension of MgO in which the MgO has a citric acid activity 200 secs. Consists of mixing MgO with water and a decomposable phosphate cpd. selected from the phosphate of Ca,al,Mg, NH4 polyphosphate and phosphoric acid and their mixts. The MgO is added in an amount sufficient to obtain 0.1-0.24 g/cc in the suspension and the phosphate is added in an amount of 0.5-25 (-0.5-10) pref. 0.5-4.5 wt% P2O5 wrt the MgO. Used for forming a glass insulating coating on a strip of oriented silicon steel or a stack of such sheets for use in transformer cores. A smooth suspension with a higher viscosity than it prior art can be obtd. with stability over periods up to 1h. without globule formation etc.
ES472370A 1977-08-04 1978-08-04 Stabilizing of viscosity of aqueous magnesia slurry and increasing concentration thereof Expired ES472370A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US82159677A 1977-08-04 1977-08-04

Publications (1)

Publication Number Publication Date
ES472370A1 true ES472370A1 (en) 1979-10-01

Family

ID=25233792

Family Applications (1)

Application Number Title Priority Date Filing Date
ES472370A Expired ES472370A1 (en) 1977-08-04 1978-08-04 Stabilizing of viscosity of aqueous magnesia slurry and increasing concentration thereof

Country Status (10)

Country Link
JP (1) JPS5460279A (en)
BE (1) BE869479A (en)
BR (1) BR7804962A (en)
CA (1) CA1112136A (en)
DE (1) DE2834321C2 (en)
ES (1) ES472370A1 (en)
FR (1) FR2399485A1 (en)
IN (1) IN149613B (en)
MX (1) MX152068A (en)
SE (1) SE7808374L (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5558331A (en) * 1978-10-25 1980-05-01 Kawasaki Steel Corp Forming method for forsterite insulation film of anisotropic silicon steel plate
CA1166804A (en) * 1982-05-06 1984-05-08 Michael H. Haselkorn Stable slurry of inactive magnesia and method therefor
JPS63148011U (en) * 1987-03-18 1988-09-29
EP0416420B1 (en) * 1989-09-08 1994-12-14 Armco Inc. Magnesium oxide coating for electrical steels and the method of coating
US6716490B2 (en) * 2002-01-30 2004-04-06 Kawasaki Steel Metal Products & Engineering Inc. Method for making enameled steel sheet
DE102013102301A1 (en) * 2013-03-08 2014-09-11 Chemische Fabrik Budenheim Kg Coating system based on a combination of monoaluminum phosphate with magnesium oxide
EP3060523B1 (en) 2013-10-24 2024-05-08 Calix Ltd Process for manufacture of hydroxide slurry

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3615918A (en) * 1969-03-28 1971-10-26 Armco Steel Corp Method of annealing with a magnesia separator containing a decomposable phosphate
BE795568A (en) * 1972-03-01 1973-06-18 Asea Ab COATING PROCESS OF A STEEL OBJECT WITH SILICON
US3841925A (en) * 1973-09-12 1974-10-15 Morton Norwich Products Inc Magnesium oxide steel coating composition and process
GB1548881A (en) * 1975-02-11 1979-07-18 Albright & Wilson Process for dispersing solid materilas

Also Published As

Publication number Publication date
JPS6225751B2 (en) 1987-06-04
IN149613B (en) 1982-02-13
BE869479A (en) 1978-12-01
SE7808374L (en) 1979-02-05
FR2399485B1 (en) 1981-02-06
FR2399485A1 (en) 1979-03-02
JPS5460279A (en) 1979-05-15
DE2834321C2 (en) 1984-09-13
BR7804962A (en) 1979-05-08
MX152068A (en) 1985-05-28
DE2834321A1 (en) 1979-02-22
CA1112136A (en) 1981-11-10

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20001009