EP 1578730 A3 20051214 - PIEZOCERAMIC COMPOSITION, PIEZOCERAMIC BODY COMPRISING SAID COMPOSITION AND A METHOD FOR PRODUCING SAID COMPOSITION AND SAID BODY
Title (en)
PIEZOCERAMIC COMPOSITION, PIEZOCERAMIC BODY COMPRISING SAID COMPOSITION AND A METHOD FOR PRODUCING SAID COMPOSITION AND SAID BODY
Title (de)
PIEZOKERAMISCHE ZUSAMMENSETZUNG, PIEZOKERAMISCHER KÖRPER MIT DER ZUSAMMENSETZUNG UND VERFAHREN ZUM HERSTELLEN DER ZUSAMMENSETZUNG UND DES KÖRPERS
Title (fr)
COMPOSITION PIEZOCERAMIQUE, CORPS PIEZOCERAMIQUE COMPRENANT CETTE COMPOSITION ET LEURS PROCEDES DE PRODUCTION
Publication
Application
Priority
- DE 0301430 W 20030505
- DE 10223987 A 20020529
Abstract (en)
[origin: WO03101946A2] The invention relates to a piezoceramic composition with the general empirical formula Pb1-aREbZrxTiyTRzO3, in which RE represents a rare-earth element, selected from a group comprising europium, gadolinium, lanthanum, neodymium, praseodymium, promethium and/or samarium, with a rare-earth element fraction b, TR represents at least one transition metal, selected from the group comprising chromium, iron and/or manganese, with a transition metal valency WTR and a transition metal fraction z and whereby the following interrelation is valid: z > b/(4 - WTR). Homogenous PZT crystals with a maximum particle size are obtained even at low sintering temperatures by a non-stoichiometric dosing ratio of transition metal dosage to rare-earth element dosage. By varying the dosages, the piezoelectric characteristics of a PZT ceramic with said composition can be modified from those of a classic soft PZT to those of a classic hard PZT. The piezoceramic body is for example a monolithic, multi-layer piezoactuator, which can be used for multiple injections in the engine of a motor vehicle, as a result of a high d33 coefficient and low internal dissipation in the high-level signal range.
IPC 1-7
IPC 8 full level
C01G 23/00 (2006.01); C01G 25/00 (2006.01); C04B 35/491 (2006.01); H01L 41/083 (2006.01); H01L 41/187 (2006.01); H01L 41/43 (2013.01); H01L 41/273 (2013.01)
CPC (source: EP US)
C01G 23/003 (2013.01 - EP US); C01G 25/006 (2013.01 - EP US); C04B 35/491 (2013.01 - EP US); H10N 30/097 (2023.02 - EP US); H10N 30/50 (2023.02 - EP US); H10N 30/8554 (2023.02 - EP US); C01P 2004/61 (2013.01 - EP US); H10N 30/053 (2023.02 - EP US)
Citation (search report)
See references of WO 03101946A2
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 03101946 A2 20031211; WO 03101946 A3 20051027; AU 2003240410 A1 20031219; AU 2003240410 A8 20031219; DE 10393064 D2 20050519; EP 1578730 A2 20050928; EP 1578730 A3 20051214; JP 2006501119 A 20060112; US 2005258718 A1 20051124
DOCDB simple family (application)
DE 0301430 W 20030505; AU 2003240410 A 20030505; DE 10393064 T 20030505; EP 03729863 A 20030505; JP 2004509640 A 20030505; US 51607805 A 20050630