公开(公告)号：EP2980040A4

公开(公告)日：2016-04-06

申请号：EP14775921

申请日：2014-03-11

Applicant: NGK SPARK PLUG CO

Inventor： YAMAZAKI MASATO ,  MATSUOKA TAKAYUKI ,  KITAMURA KAZUAKI ,  KOZUKA HISASHI ,  YAMADA HIDETO ,  KURAHASHI TOSHIAKI ,  KASASHIMA TAKASHI ,  OKIMURA YASUYUKI ,  OHBAYASHI KAZUSHIGE

IPC: C04B35/00 ,  H01L41/09 ,  H01L41/113 ,  H01L41/187 ,  H01L41/333 ,  H03H3/02 ,  H03H9/17

CPC classification number: C04B35/495 ,  C04B2235/3201 ,  C04B2235/3203 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3215 ,  C04B2235/3232 ,  C04B2235/3234 ,  C04B2235/3236 ,  C04B2235/3244 ,  C04B2235/3251 ,  C04B2235/3262 ,  C04B2235/3272 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/3293 ,  C04B2235/3294 ,  C04B2235/3418 ,  C04B2235/602 ,  C04B2235/768 ,  C04B2235/80 ,  G01L23/222 ,  H01L41/047 ,  H01L41/08 ,  H01L41/09 ,  H01L41/1132 ,  H01L41/187 ,  H01L41/1873 ,  H01L41/43 ,  H03H9/02031

Abstract: A lead-free piezoelectric ceramic composition includes a first crystal phase made of an alkali niobate/tantalate type perovskite oxide having piezoelectric properties, and a second crystal phase made of an M-Ti-O spinel compound (where the element M is a monovalent to quadrivalent element).

公开(公告)号：EP3130573A4

公开(公告)日：2018-03-14

申请号：EP15776038

申请日：2015-03-05

Applicant: NGK SPARK PLUG CO

Inventor： KOZUKA HISASHI ,  YAMADA HIDETO ,  MATSUOKA TAKAYUKI ,  KITAMURA KAZUAKI ,  YAMAZAKI MASATO ,  KURAHASHI TOSHIAKI ,  KASASHIMA TAKASHI ,  OKIMURA YASUYUKI ,  OHBAYASHI KAZUSHIGE

IPC: C04B35/00 ,  H01L41/187 ,  H01L41/39 ,  H01L41/43

CPC classification number: H01L41/1873 ,  C04B35/495 ,  C04B35/64 ,  C04B2235/3201 ,  C04B2235/3203 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3225 ,  C04B2235/3232 ,  C04B2235/3244 ,  C04B2235/3255 ,  C04B2235/3262 ,  C04B2235/3267 ,  C04B2235/3272 ,  C04B2235/3277 ,  C04B2235/3279 ,  C04B2235/3284 ,  C04B2235/3286 ,  C04B2235/604 ,  C04B2235/768 ,  C04B2235/79 ,  C04B2235/80 ,  C04B2235/96 ,  H01L41/047 ,  H01L41/43

Abstract: Provided is a lead-free piezoelectric ceramic composition having high piezoelectric properties. The lead-free piezoelectric ceramic composition fulfils a molar ratio (Na/K) for Na (sodium) and K (potassium) in the main phase thereof of 0.40 direction when the main phase is expressed as a pseudo cubic crystal. The area ratio of the crystal phase reflecting the second spot group in the main phase is no more than 33% and the maximum particle diameter of the crystals reflecting the second spot group in the main phase is no more than 25 nm.

公开(公告)号：EP2835363A4

公开(公告)日：2015-11-18

申请号：EP13773068

申请日：2013-04-02

Applicant: NGK SPARK PLUG CO

Inventor： KOZUKA HISASHI ,  HISHIDA TOMOKO ,  YAMADA HIDETO ,  OHBAYASHI KAZUSHIGE

IPC: C04B35/50 ,  H05K1/09

CPC classification number: H01B1/08 ,  C04B35/01 ,  C04B35/50 ,  C04B2235/3224 ,  C04B2235/3227 ,  C04B2235/3229 ,  C04B2235/3275 ,  C04B2235/3279 ,  C04B2235/72 ,  C04B2235/725 ,  C04B2235/768 ,  C04B2235/80 ,  H05K1/0306 ,  H05K1/09 ,  H05K2201/0326

Abstract: Provided is a sintered oxide compact that has high electric conductivity and a small B-value (temperature coefficient), and is suitable for use as an electrically conductive material, and a circuit board that uses the sintered oxide compact. The sintered oxide compact is represented by a composition formula: REaCobNicOx (where RE represents a rare earth element, a + b + c = 1, and 1.3 ‰¤ x ‰¤ 1.7), the sintered oxide compact includes a perovskite phase with a perovskite-type oxide crystal structure, and the a, b, and c satisfy the following relationships: 0.459 ‰¤ a ‰¤ 0.535, 0.200 ‰¤ b ‰¤ 0.475, and 0.025 ‰¤ c ‰¤ 0.300.

公开(公告)号：EP3130574A4

公开(公告)日：2018-03-14

申请号：EP15776632

申请日：2015-03-05

Applicant: NGK SPARK PLUG CO

Inventor： KOZUKA HISASHI ,  YAMADA HIDETO ,  MATSUOKA TAKAYUKI ,  KITAMURA KAZUAKI ,  YAMAZAKI MASATO ,  KURAHASHI TOSHIAKI ,  KASASHIMA TAKASHI ,  OKIMURA YASUYUKI ,  OHBAYASHI KAZUSHIGE

IPC: C04B35/00 ,  H01L41/187 ,  H01L41/39 ,  H01L41/43

CPC classification number: H01L41/1873 ,  C04B35/495 ,  C04B35/64 ,  C04B2235/3201 ,  C04B2235/3203 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3232 ,  C04B2235/3234 ,  C04B2235/3244 ,  C04B2235/3255 ,  C04B2235/3267 ,  C04B2235/3272 ,  C04B2235/3277 ,  C04B2235/3279 ,  C04B2235/3284 ,  C04B2235/3286 ,  C04B2235/604 ,  C04B2235/763 ,  C04B2235/768 ,  C04B2235/79 ,  C04B2235/80 ,  C04B2235/96 ,  H01L41/047 ,  H01L41/43

Abstract: Provided is a lead-free piezoelectric ceramic composition having high piezoelectric properties. The lead-free piezoelectric ceramic composition fulfils a molar ratio (Na/K) for Na (sodium) and K (potassium) in the main phase thereof of 0.40 direction when the main phase is expressed as a pseudo cubic crystal.

公开(公告)号：EP2733131A4

公开(公告)日：2015-02-25

申请号：EP12811521

申请日：2012-07-04

Applicant: NGK SPARK PLUG CO

Inventor： YAMAZAKI MASATO ,  MATSUOKA TAKAYUKI ,  KITAMURA KAZUAKI ,  YAMADA HIDETO ,  KURAHASHI TOSHIAKI ,  YAMAGIWA KATSUYA ,  OHBAYASHI KAZUSHIGE

IPC: C04B35/495 ,  B06B1/06 ,  C04B35/626 ,  G01L23/22 ,  H01L41/187 ,  H01L41/43

CPC classification number: C04B35/64 ,  B06B1/0618 ,  C04B35/495 ,  C04B35/62685 ,  C04B2235/3201 ,  C04B2235/3203 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3224 ,  C04B2235/3234 ,  C04B2235/3244 ,  C04B2235/3251 ,  C04B2235/3267 ,  C04B2235/3272 ,  C04B2235/3275 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/3291 ,  C04B2235/3298 ,  C04B2235/768 ,  C04B2235/79 ,  C04B2235/80 ,  G01L23/222 ,  H01L41/1873 ,  H01L41/43

Abstract: A lead-free piezoelectric ceramic composition mainly includes a first crystal phase (KNN phase) and a second crystal phase (NTK phase). In the first crystal phase (KNN phase), a plurality of crystal grains formed of an alkali niobate/tantalate perovskite oxide having piezoelectric characteristics is bound to each other in a deposited state. The second crystal phase (NTK phase) is formed of a compound containing titanium (Ti) and fills spaces between the crystal grains in the first crystal phase.