CA1109772A - Process of producing an electrically insulative glass film on silicon steel - Google Patents
Process of producing an electrically insulative glass film on silicon steelInfo
- Publication number
- CA1109772A CA1109772A CA303,157A CA303157A CA1109772A CA 1109772 A CA1109772 A CA 1109772A CA 303157 A CA303157 A CA 303157A CA 1109772 A CA1109772 A CA 1109772A
- Authority
- CA
- Canada
- Prior art keywords
- magnesia
- boron
- weight
- magnesium oxide
- stock
- 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
Links
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000011521 glass Substances 0.000 title claims abstract description 21
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 171
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 107
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 98
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910052796 boron Inorganic materials 0.000 claims abstract description 60
- 239000011248 coating agent Substances 0.000 claims abstract description 51
- 238000000576 coating method Methods 0.000 claims abstract description 51
- 230000000694 effects Effects 0.000 claims abstract description 43
- 239000002245 particle Substances 0.000 claims abstract description 41
- 238000009826 distribution Methods 0.000 claims abstract description 33
- 239000002002 slurry Substances 0.000 claims abstract description 31
- 230000035699 permeability Effects 0.000 claims abstract description 26
- 150000001639 boron compounds Chemical class 0.000 claims abstract description 18
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 8
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 238000000137 annealing Methods 0.000 claims description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 239000010703 silicon Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 239000004408 titanium dioxide Substances 0.000 claims description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 6
- 239000011593 sulfur Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 5
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 5
- 238000001953 recrystallisation Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 abstract 1
- 235000012245 magnesium oxide Nutrition 0.000 description 80
- 238000007792 addition Methods 0.000 description 18
- 239000000523 sample Substances 0.000 description 18
- 230000036571 hydration Effects 0.000 description 15
- 238000006703 hydration reaction Methods 0.000 description 15
- 239000000463 material Substances 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000013068 control sample Substances 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 239000000161 steel melt Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000003966 growth inhibitor Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005261 decarburization Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 150000004677 hydrates Chemical class 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- CADICXFYUNYKGD-UHFFFAOYSA-N sulfanylidenemanganese Chemical compound [Mn]=S CADICXFYUNYKGD-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 241000518994 Conta Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000006255 coating slurry Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- -1 hydroxyl ions Chemical class 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000006148 magnetic separator Substances 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000005373 porous glass Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- VLCLHFYFMCKBRP-UHFFFAOYSA-N tricalcium;diborate Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]B([O-])[O-].[O-]B([O-])[O-] VLCLHFYFMCKBRP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
-
- 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)
- Chemical Treatment Of Metals (AREA)
- Soft Magnetic Materials (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US79885577A | 1977-05-20 | 1977-05-20 | |
| US798,855 | 1977-05-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1109772A true CA1109772A (en) | 1981-09-29 |
Family
ID=25174443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA303,157A Expired CA1109772A (en) | 1977-05-20 | 1978-05-11 | Process of producing an electrically insulative glass film on silicon steel |
Country Status (11)
Families Citing this family (10)
| 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 |
| JPS57207114A (en) * | 1981-06-16 | 1982-12-18 | Nippon Steel Corp | Manufacture of anisotropic electric steel plate |
| CA1166804A (en) * | 1982-05-06 | 1984-05-08 | Michael H. Haselkorn | Stable slurry of inactive magnesia and method therefor |
| US4582547A (en) * | 1984-05-07 | 1986-04-15 | Allegheny Ludlum Steel Corporation | Method for improving the annealing separator coating on silicon steel and coating therefor |
| JPS60263405A (ja) * | 1984-06-11 | 1985-12-26 | Fujikura Ltd | 硅素鋼帯コア絶縁基板の製造方法 |
| JP3382804B2 (ja) * | 1997-01-28 | 2003-03-04 | 新日本製鐵株式会社 | グラス皮膜の優れる方向性電磁鋼板の製造方法 |
| JP4122448B2 (ja) * | 2002-11-28 | 2008-07-23 | タテホ化学工業株式会社 | 焼鈍分離剤用酸化マグネシウム |
| CN111943262A (zh) * | 2020-08-24 | 2020-11-17 | 山西银圣科技有限公司 | 一种取向硅钢专用二氧化钛的制备方法 |
| CN114645126B (zh) * | 2022-03-09 | 2024-06-25 | 山西银圣科技有限公司 | 一种普通取向硅钢氧化镁隔离剂及其制备方法和应用 |
| WO2025163789A1 (ja) * | 2024-01-31 | 2025-08-07 | 日本製鉄株式会社 | ＭｇＯ粉末、ＭｇＯ粉末の製造方法、ＭｇＯ粒子の製造方法、方向性電磁鋼板の製造方法 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1287424A (en) * | 1968-11-01 | 1972-08-31 | Nippon Steel Corp | Process for producing oriented magnetic steel plates low in the iron loss |
| BE754777A (fr) * | 1969-08-18 | 1971-02-12 | Morton Int Inc | Composition de revetement a base d'oxyde de magnesium et procede d'utilisation de cette composition |
| JPS5231296B2 (enrdf_load_html_response) * | 1973-06-07 | 1977-08-13 | ||
| GB1398504A (en) * | 1973-07-05 | 1975-06-25 | Merck & Co Inc | Coating surface-oxidized silicon-containing steel |
| US3841925A (en) * | 1973-09-12 | 1974-10-15 | Morton Norwich Products Inc | Magnesium oxide steel coating composition and process |
| FR2288151A1 (fr) * | 1974-10-14 | 1976-05-14 | Nippon Steel Corp | Produits de separation pour recuit pour des toles d'acier au silicium, a base d'oxyde de magnesium et d'oxyde de bore |
| US4010050A (en) * | 1975-09-08 | 1977-03-01 | Allegheny Ludlum Industries, Inc. | Processing for aluminum nitride inhibited oriented silicon steel |
-
1978
- 1978-05-03 GB GB17487/78A patent/GB1597656A/en not_active Expired
- 1978-05-08 IN IN338/DEL/78A patent/IN148757B/en unknown
- 1978-05-11 CA CA303,157A patent/CA1109772A/en not_active Expired
- 1978-05-16 DE DE19782821417 patent/DE2821417A1/de active Granted
- 1978-05-18 BR BR7803158A patent/BR7803158A/pt unknown
- 1978-05-18 SE SE7805720A patent/SE444186B/sv not_active IP Right Cessation
- 1978-05-19 ES ES470030A patent/ES470030A1/es not_active Expired
- 1978-05-19 BE BE187852A patent/BE867259A/xx not_active IP Right Cessation
- 1978-05-19 JP JP53059872A patent/JPS5942750B2/ja not_active Expired
- 1978-05-19 FR FR7814938A patent/FR2391540A1/fr active Granted
- 1978-05-22 IT IT23676/78A patent/IT1096309B/it active
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5942750B2 (ja) | 1984-10-17 |
| FR2391540B1 (enrdf_load_html_response) | 1981-02-27 |
| JPS5433839A (en) | 1979-03-12 |
| SE7805720L (sv) | 1978-11-21 |
| IT7823676A0 (it) | 1978-05-22 |
| SE444186B (sv) | 1986-03-24 |
| DE2821417A1 (de) | 1978-11-30 |
| GB1597656A (en) | 1981-09-09 |
| ES470030A1 (es) | 1979-09-16 |
| IT1096309B (it) | 1985-08-26 |
| FR2391540A1 (fr) | 1978-12-15 |
| BE867259A (fr) | 1978-11-20 |
| DE2821417C2 (enrdf_load_html_response) | 1987-05-21 |
| IN148757B (enrdf_load_html_response) | 1981-06-06 |
| BR7803158A (pt) | 1979-01-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4979996A (en) | Process for preparation of grain-oriented electrical steel sheet comprising a nitriding treatment | |
| US4863532A (en) | Grain-oriented electromagnetic steel sheet | |
| US3700506A (en) | Method for reducing an iron loss of an oriented magnetic steel sheet having a high magnetic induction | |
| CA1109772A (en) | Process of producing an electrically insulative glass film on silicon steel | |
| US3873381A (en) | High permeability cube-on-edge oriented silicon steel and method of making it | |
| US4030950A (en) | Process for cube-on-edge oriented boron-bearing silicon steel including normalizing | |
| US4582547A (en) | Method for improving the annealing separator coating on silicon steel and coating therefor | |
| CA2024226C (en) | Magnesium oxide coating for electrical steels and a method of coating | |
| US4168189A (en) | Process of producing an electrically insulative film | |
| US4054471A (en) | Processing for cube-on-edge oriented silicon steel | |
| US4319936A (en) | Process for production of oriented silicon steel | |
| US4200477A (en) | Processing for electromagnetic silicon steel | |
| US5192373A (en) | Magnesium oxide coating for electrical steels and the method of coating | |
| JP2650817B2 (ja) | 被膜特性及び磁気特性に優れた一方向性けい素鋼板の製造方法 | |
| US4498936A (en) | Insulative coating composition for electrical steels | |
| US4102713A (en) | Silicon steel and processing therefore | |
| US4160681A (en) | Silicon steel and processing therefore | |
| US4213804A (en) | Processing for cube-on-edge oriented silicon steel | |
| CA1166804A (en) | Stable slurry of inactive magnesia and method therefor | |
| US4344802A (en) | Stable slurry of inactive magnesia and method therefor | |
| US3379581A (en) | Desulfurizing coating for ferrous material and method of using it | |
| US4179315A (en) | Silicon steel and processing therefore | |
| US4338144A (en) | Method of producing silicon-iron sheet material with annealing atmospheres of nitrogen and hydrogen | |
| CA1112136A (en) | Method of stabilizing viscosity and increasing concentration of aqueous magnesia slurry | |
| US3976518A (en) | Process for producing grain-oriented electric steel sheets having remarkably improved magnetic flux density |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |