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1. (WO2018142151) METHODS OF IDENTIFYING A CERAMIC MATERIAL EXHIBITING AN ELECTRIC FIELD INDUCED STRAIN DERIVED FROM A REVERSIBLE PHASE TRANSITION, METHODS OF PREPARATION AND CERAMIC MATERIALS OBTAINABLE THEREFROM
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Pub. No.: WO/2018/142151 International Application No.: PCT/GB2018/050306
Publication Date: 09.08.2018 International Filing Date: 02.02.2018
IPC:
C04B 35/475 (2006.01) ,H01L 41/187 (2006.01) ,C04B 35/462 (2006.01) ,C04B 35/465 (2006.01) ,C04B 35/468 (2006.01)
C CHEMISTRY; METALLURGY
04
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
35
Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
01
based on oxides
46
based on titanium oxides or titanates
462
based on titanates
475
based on bismuth titanates
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
L
SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
41
Piezo-electric devices in general; Electrostrictive devices in general; Magnetostrictive devices in general; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
16
Selection of materials
18
for piezo-electric or electrostrictive elements
187
Ceramic compositions
C CHEMISTRY; METALLURGY
04
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
35
Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
01
based on oxides
46
based on titanium oxides or titanates
462
based on titanates
C CHEMISTRY; METALLURGY
04
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
35
Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
01
based on oxides
46
based on titanium oxides or titanates
462
based on titanates
465
based on alkaline earth metal titanates
C CHEMISTRY; METALLURGY
04
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
35
Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
01
based on oxides
46
based on titanium oxides or titanates
462
based on titanates
465
based on alkaline earth metal titanates
468
based on barium titanates
Applicants:
CANN, David [US/US]; US (US)
GIBBONS, Brady [US/US]; US (US)
MARDILOVICH, Peter [US/GB]; GB (US)
XAAR TECHNOLOGY LIMITED [GB/GB]; Science Park Cambridge Cambridgeshire CB4 0XR, GB (AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BE, BF, BG, BH, BJ, BN, BR, BW, BY, BZ, CA, CF, CG, CH, CI, CL, CM, CN, CO, CR, CU, CY, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, FR, GA, GB, GD, GE, GH, GM, GN, GQ, GR, GT, GW, HN, HR, HU, ID, IE, IL, IN, IR, IS, IT, JO, JP, KE, KG, KH, KM, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MC, MD, ME, MG, MK, ML, MN, MR, MT, MW, MX, MY, MZ, NA, NE, NG, NI, NL, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SI, SK, SL, SM, SN, ST, SV, SY, SZ, TD, TG, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, UZ, VC, VN, ZA, ZM, ZW)
Inventors:
CANN, David; US
GIBBONS, Brady; US
MARDILOVICH, Peter; GB
Agent:
STOTT, Michael; GB
Priority Data:
1701830.003.02.2017GB
Title (EN) METHODS OF IDENTIFYING A CERAMIC MATERIAL EXHIBITING AN ELECTRIC FIELD INDUCED STRAIN DERIVED FROM A REVERSIBLE PHASE TRANSITION, METHODS OF PREPARATION AND CERAMIC MATERIALS OBTAINABLE THEREFROM
(FR) PROCÉDÉS D'IDENTIFICATION D'UN MATÉRIAU CÉRAMIQUE PRÉSENTANT UNE CONTRAINTE INDUITE PAR UN CHAMP ÉLECTRIQUE DÉRIVÉE D'UNE TRANSITION DE PHASE RÉVERSIBLE, PROCÉDÉS DE PRÉPARATION ET MATÉRIAUX CÉRAMIQUES POUVANT ÊTRE OBTENUS À PARTIR DE CEUX-CI
Abstract:
(EN) The present invention relates to a method for identifying a solid solution ceramic material of a plurality of perovskite compounds which exhibits an electric field induced strain derived from a reversible phase transition, as well as a method for making such ceramic materials and ceramic materials obtainable therefrom. In particular, the present invention is directed to a method of identifying a solid solution ceramic material of at least three perovskite compounds which exhibits an electric field induced strain derived from a reversible phase transition; said method comprising the steps of: i) determining a molar ratio of at least one tetragonal perovskite compound to at least one non-tetragonal perovskite compound which, when combined to form a solid solution, provides a ceramic material comprising a major portion of a tetragonal phase having an axial ratio c/a of greater than 1.005 to 1.04; and ii) determining a molar ratio of at least one additional non-tetragonal perovskite compound to the combination of perovskite compounds from step i) at the determined molar ratio which, when combined to form a solid solution, provides a ceramic material comprising a major portion of a pseudo-cubic phase having an axial ratio c/a of from 0.995 to 1.005 and/or a rhombohedral angle of 90 ± 0.5 degrees.
(FR) La présente invention concerne un procédé d'identification d'un matériau céramique en solution solide constitué par une pluralité de composés de type pérovskite, qui présente une contrainte induite par un champ électrique dérivée d'une transition de phase réversible, ainsi qu'un procédé de préparation de tels matériaux céramiques et les matériaux céramiques pouvant être obtenus à partir de ceux-ci. En particulier, la présente invention concerne un procédé d'identification d'un matériau céramique en solution solide constitué par au moins trois composés de type pérovskite, qui présente une contrainte induite par un champ électrique dérivée d'une transition de phase réversible ; ledit procédé comprenant les étapes consistant à : i) déterminer un rapport molaire d'au moins un composé de type pérovskite tétragonal à au moins un composé de type pérovskite non tétragonal qui, lorsqu'il est combiné pour former une solution solide, permet d'obtenir un matériau céramique comprenant une partie principale d'une phase tétragonale présentant un rapport axial c/a supérieur à 1,005 jusqu'à 1,04 ; et ii) déterminer un rapport molaire d'au moins un composé de type pérovskite non tétragonal supplémentaire à la combinaison de composés de type pérovskite de l'étape i) au rapport molaire déterminé qui, lorsqu'il est combiné pour former une solution solide, permet d'obtenir un matériau céramique comprenant une partie principale d'une phase pseudo-cubique présentant un rapport axial c/a de 0,995 à 1,005 et/ou un angle rhomboédrique de 90 ± 0,5 degrés.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)