| 摘要 |
1397742 Metal oxide coatings GLAVERBEL 22 June 1972 [8 July 1971] 29383/72 Heading C1A [Also in Division C2] An acetyl acetonate coprecipitate of two or more metals is applied to a substrate and is simultaneously or subsequently heated to produce a metal oxide coating which is at least partly composed of an oxidic compound containing two or more metals. The necessary heat may be supplied by pre-heating the substrate and the coprecipitate may be applied in a solution, preferably in droplet form. The solution may contain as solvent an aprotic solvent (e.g. having a dielectric constant greater than 15 and a dipolar moment greater than 3 Debye units), a substituted or unsubstituted monocarboxylic acid solvent, an amine or diamine solvent, or a mixture of two or more solvents selected from solvents of the above classes. The coating may be applied to glass which is being manufactured as a continuous ribbon and to other vitreous and partly vitreous articles. The coatings may be compounds of the type AB 2 O 4 where A is a bivalent metal and B is a trivalent metal, e.g. zinc cobaltite, Cd, Ni, Zn, Mn and Fe, chromites and Mn, Co, Cu, Cd, Ni and Zn ferrites; ABO 3 , A being bivalent, e.g. Ni, Zn, Fe Cu or Co zirconates; A 2 B 2 O 7 , e.g. yttrium zirconate or nickel vanadate; ABO 4 , e.g. iron or chromium vanadate or nickel tungstate. The acetyl acetonate coprecipitate can be prepared by bringing, e.g. the hydroxides, halides, carbonates or nitrates into contact with a solution of acetyl acetone. Examples describe the preparation of coatings from acetyl acetonate coprecipitates of (1) Fe and Cu; (2) V and Fe; (3) Zn and Co; (4) Zn and Cr. In Example 5 the coatings are of Ni 2 V 2 O 7 , NiCr 2 O 4 , MnFe 2 O 4 , CoCr 2 O 4 , CrVO 4 , CuCr 2 O 4 , NiZrO 3 , Y 2 Zr 2 O 7 , NiWO 4 , InVO 4 , BiVO 4 , the solvents used being variously acrylic acid, dimethylformamide, formic acid, ethylene diamine, propylamine, nitrobenzene, propylene diamine and thioglycolic acid. |
