# US 8,771,631 B2 · Method for producing perovskite type composite oxide > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,771,631 B2 - Document ID: US8771631B2 - Status: Granted - Kind: B2 - Application number: 13/401,994 - Filed: 2012-02-22 - Published: 2012-08-30 - Granted: 2014-07-08 - Earliest claimed: 2011-02-25 - Assignees: Murata Manufacturing Co., Ltd. - Applicants: Toshiharu Nakagawa; Norikazu Tachibana; Yasunari Nakamura - Inventors: Toshiharu Nakagawa; Norikazu Tachibana; Yasunari Nakamura - Web page: https://patentgrep.com/patent/US8771631B2 ## CPC - H01G 4/1227: {based on alkaline earth titanates} - B32B 18/00: Layered products essentially comprising ceramics, e.g. refractory products - C01G 23/006: {Alkaline earth titanates} - C04B 35/4682: {based on BaTiO3 perovskite phase} - C04B 35/62685: {characterised by the order of addition of constituents or additives} - C01P 2002/54: one element only - C04B 2235/3206: Magnesium oxides or oxide-forming salts thereof - C04B 2235/3208: Calcium oxide or oxide-forming salts thereof, e.g. lime - C04B 2235/3215: Barium oxides or oxide-forming salts thereof - C04B 2235/3224: Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide - C04B 2235/3232: Titanium oxides or titanates, e.g. rutile or anatase - C04B 2235/3262: Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO - C04B 2235/3418: Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint - C04B 2235/442: Carbonates - C04B 2235/443: Nitrates or nitrites - C04B 2235/449: Organic acids, e.g. EDTA, citrate, acetate, oxalate - C04B 2235/6025: Tape casting, e.g. with a doctor blade - C04B 2235/761: Unit-cell parameters, e.g. lattice constants - C04B 2235/765: Tetragonal symmetry - C04B 2237/346: Titania or titanates - H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20) - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE - C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS ## Abstract A method is provided which includes a reaction step of reacting at least titanium oxide, a calcium compound, and barium hydroxide in a slurry solution so as to produce a perovskite-type composite oxide. The perovskite-type composite oxide is represented by (Ba1-xCax)mTiO3, and x is within a range of 0