Bismuth-sodium titanate base lead-free piezoelectric ceramic
This invention relates to bismuth natrium titanate group lead-free piezoelectric ceramics, its goal is to reduce coercive field and improve piezoelectricity. Basic material mol ratio and component expression is (1-x-y)(Bi1/2Na1/2)TiO3-x(Bi1/2K1/2)TiO3-yKNbO3, in the formula 0
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| creator | WENZHONG,FAN LV |
| description | This invention relates to bismuth natrium titanate group lead-free piezoelectric ceramics, its goal is to reduce coercive field and improve piezoelectricity. Basic material mol ratio and component expression is (1-x-y)(Bi1/2Na1/2)TiO3-x(Bi1/2K1/2)TiO3-yKNbO3, in the formula 0 |
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Basic material mol ratio and component expression is (1-x-y)(Bi1/2Na1/2)TiO3-x(Bi1/2K1/2)TiO3-yKNbO3, in the formula 0<=x<1,0<y<0.2, 0<(x+y)<1, and its preparation method is that (1) Bi2O3, Na2CO3, (COOK)2.H2O, TiO2, Nb2O5 are prepared by chemical measuring ratio of the formula as materials, pure alcohol is medium ball mill. (2) Powder material after ball mill is dried and pre-burned for 2 hours at 800-850 degree C, and then adhesive is added for forming. (3) They are sintered 2-3 hours at 1100-1180 degrees C. (4) Silver electrode is prepared on the ceramics piece after sintered, then it is polarized for 10-15 minutes under voltage of 4-5 kV in 30-60 degrees C silicone oil. The d33 of the compound in this invention can reach 190pC/N, Kp can reach 0.37, and its technique is stable, so it is suitable to piezoelectric oscillator and ultrasonic transducer fields.]]></description><language>eng</language><subject>ARTIFICIAL STONE ; CEMENTS ; CERAMICS ; CHEMISTRY ; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS ; CONCRETE ; LIME, MAGNESIA ; METALLURGY ; REFRACTORIES ; SLAG ; TREATMENT OF NATURAL STONE</subject><creationdate>2006</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20061025&DB=EPODOC&CC=CN&NR=1850718A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20061025&DB=EPODOC&CC=CN&NR=1850718A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>WENZHONG,FAN LV</creatorcontrib><title>Bismuth-sodium titanate base lead-free piezoelectric ceramic</title><description><![CDATA[This invention relates to bismuth natrium titanate group lead-free piezoelectric ceramics, its goal is to reduce coercive field and improve piezoelectricity. Basic material mol ratio and component expression is (1-x-y)(Bi1/2Na1/2)TiO3-x(Bi1/2K1/2)TiO3-yKNbO3, in the formula 0<=x<1,0<y<0.2, 0<(x+y)<1, and its preparation method is that (1) Bi2O3, Na2CO3, (COOK)2.H2O, TiO2, Nb2O5 are prepared by chemical measuring ratio of the formula as materials, pure alcohol is medium ball mill. (2) Powder material after ball mill is dried and pre-burned for 2 hours at 800-850 degree C, and then adhesive is added for forming. (3) They are sintered 2-3 hours at 1100-1180 degrees C. (4) Silver electrode is prepared on the ceramics piece after sintered, then it is polarized for 10-15 minutes under voltage of 4-5 kV in 30-60 degrees C silicone oil. The d33 of the compound in this invention can reach 190pC/N, Kp can reach 0.37, and its technique is stable, so it is suitable to piezoelectric oscillator and ultrasonic transducer fields.]]></description><subject>ARTIFICIAL STONE</subject><subject>CEMENTS</subject><subject>CERAMICS</subject><subject>CHEMISTRY</subject><subject>COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS</subject><subject>CONCRETE</subject><subject>LIME, MAGNESIA</subject><subject>METALLURGY</subject><subject>REFRACTORIES</subject><subject>SLAG</subject><subject>TREATMENT OF NATURAL STONE</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2006</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLBxyizOLS3J0C3OT8kszVUoySxJzEssSVVISixOVchJTUzRTStKTVUoyEytyk_NSU0uKcpMVkhOLUrMzUzmYWBNS8wpTuWF0twM8m6uIc4euqkF-fGpxQWJyal5qSXxzn6GFqYG5oYWjsaEVQAAR6IvNQ</recordid><startdate>20061025</startdate><enddate>20061025</enddate><creator>WENZHONG,FAN LV</creator><scope>EVB</scope></search><sort><creationdate>20061025</creationdate><title>Bismuth-sodium titanate base lead-free piezoelectric ceramic</title><author>WENZHONG,FAN LV</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CN1850718A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2006</creationdate><topic>ARTIFICIAL STONE</topic><topic>CEMENTS</topic><topic>CERAMICS</topic><topic>CHEMISTRY</topic><topic>COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS</topic><topic>CONCRETE</topic><topic>LIME, MAGNESIA</topic><topic>METALLURGY</topic><topic>REFRACTORIES</topic><topic>SLAG</topic><topic>TREATMENT OF NATURAL STONE</topic><toplevel>online_resources</toplevel><creatorcontrib>WENZHONG,FAN LV</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>WENZHONG,FAN LV</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Bismuth-sodium titanate base lead-free piezoelectric ceramic</title><date>2006-10-25</date><risdate>2006</risdate><abstract><![CDATA[This invention relates to bismuth natrium titanate group lead-free piezoelectric ceramics, its goal is to reduce coercive field and improve piezoelectricity. Basic material mol ratio and component expression is (1-x-y)(Bi1/2Na1/2)TiO3-x(Bi1/2K1/2)TiO3-yKNbO3, in the formula 0<=x<1,0<y<0.2, 0<(x+y)<1, and its preparation method is that (1) Bi2O3, Na2CO3, (COOK)2.H2O, TiO2, Nb2O5 are prepared by chemical measuring ratio of the formula as materials, pure alcohol is medium ball mill. (2) Powder material after ball mill is dried and pre-burned for 2 hours at 800-850 degree C, and then adhesive is added for forming. (3) They are sintered 2-3 hours at 1100-1180 degrees C. (4) Silver electrode is prepared on the ceramics piece after sintered, then it is polarized for 10-15 minutes under voltage of 4-5 kV in 30-60 degrees C silicone oil. The d33 of the compound in this invention can reach 190pC/N, Kp can reach 0.37, and its technique is stable, so it is suitable to piezoelectric oscillator and ultrasonic transducer fields.]]></abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE LIME, MAGNESIA METALLURGY REFRACTORIES SLAG TREATMENT OF NATURAL STONE |
| title | Bismuth-sodium titanate base lead-free piezoelectric ceramic |
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