Method of preparing lead and alkaline earth titanates and niobates and coating method using the same to form a capacitor

• US 3,330,697 A
• Filed: 08/26/1963
• Issued: 07/11/1967
• Est. Priority Date: 08/26/1963
• Status: Expired due to Term

• Current Assignee: Maggio P. Pechini
• Original Assignee: Maggio P. Pechini
• Inventors: Pechini, Maggio P.
• Application Number:
  US04/304,434
• Time in Patent Office: 1,415 Days
• US Class Current: 427/79
• CPC Class Codes: C01G 23/003 Titanates C01G23/001 takes precedence
• CPC Class Codes: C01G 25/00 Compounds of zirconium
• CPC Class Codes: C01P 2006/40 Electric properties
• CPC Class Codes: C04B 2235/441 Alkoxides, e.g. methoxide, tert-butoxide
• CPC Class Codes: C04B 2235/449 Organic acids, e.g. EDTA, citrate, acetate, oxalate
• CPC Class Codes: C04B 2235/768 Perovskite structure ABO3
• CPC Class Codes: C04B 35/4682 based on BaTiO3 perovskite phase
• CPC Class Codes: C04B 35/6264 Mixing media, e.g. organic solvents
• CPC Class Codes: C04B 35/6267 Pyrolysis, carbonisation or auto-combustion reactions
• CPC Class Codes: C23C 18/1216 Metal oxides C23C18/1212 takes precedence
• CPC Class Codes: C23C 18/1241 Metallic substrates
• CPC Class Codes: H01G 4/12 Ceramic dielectrics H01G4/085 takes precedence

Claims

5. THE METHOD OF FORMING A CAPACITOR COMPRISING APPLYING TO THE SURFACE OF A METAL ELECTRODE A RESINOUS COATING PREPARED BY THE PROCESS COMPRISING DISSOLVING AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF THE HYDRATED OXIDE, ALKOXIDE, AND ALPHA-HYDROXYCARBOXYLATE OF TITANIUM, NIOBIUM AND ZICONIUM WITH CRITIC ACID IN AN EXCESS OF A POLYHYDROXY ALCOHOL WHICH IS A LIQUID BELOW 100*C., DISSOLVING THEREIN AT LEAST ONE BASIC METAL COMPOUND FROM THE GROUP CONSISTING OF THE OXIDE, HYDROXIDE, CARBONATE AND ALKOXIDE OF LEAD AND THE ALKALINE EARTH METALS;

EVAPORATING THE EXCESS ALCOHOL FROM THE COATED METAL ELECTRODE;

CALCINING THE COATED ELECTRODE TO YIELD A DIELECTRIC LAYER THEREON AND APPLYING THERETO A COUNTERELECTRODE.