公开(公告)号：US20160052826A1

公开(公告)日：2016-02-25

申请号：US14780235

申请日：2014-03-11

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Masato YAMAZAKI ,  Takayuki MATSUOKA ,  Kazuaki KITAMURA ,  Hisashi KOZUKA ,  Hideto YAMADA ,  Toshiaki KURAHASHI ,  Yasuyuki OKIMURA ,  Kazushige OHBAYASHI ,  Takashi KASASHIMA

IPC: C04B35/495 ,  H01L41/047 ,  H01L41/113 ,  H01L41/09 ,  H01L41/187 ,  H01L41/08

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).

Abstract translation: 无铅压电陶瓷组合物包括由具有压电性质的铌酸盐/钽酸钙型钙钛矿氧化物制成的第一结晶相和由M-Ti-O尖晶石化合物（其中元素M为单价至 四价元素）。

公开(公告)号：US20210246367A1

公开(公告)日：2021-08-12

申请号：US16973322

申请日：2019-07-01

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Shohei TAKAKU ,  Yusuke KATSU ,  Tsuneyuki ITO ,  Toshiaki KURAHASHI ,  Hideto YAMADA

IPC: C09K11/02 ,  F21V9/30 ,  C09K11/77 ,  C04B35/117

Abstract: One aspect of the disclosure provides an optical wavelength conversion member including a polycrystalline ceramic sintered body containing, as main components, Al2O3 crystal grains and crystal grains represented by formula (Y,A)3B5O12:Ce. In the optical wavelength conversion member, a (Y,A)3B5O12:Ce crystal grain has a region wherein the A concentration of a peripheral portion of the (Y,A)3B5O12:Ce crystal grain is higher than that of an interior portion of the (Y,A)3B5O12:Ce crystal grain. Thus, the optical wavelength conversion member exhibits high fluorescence intensity (i.e., high emission intensity) and high heat resistance (i.e., low likelihood of temperature quenching). The optical wavelength conversion member has a structure wherein the element A concentration of a peripheral portion of a (Y,A)3B5O12:Ce crystal grain differs from that in an interior portion of the crystal grain. This structure can achieve a ceramic fluorescent body exhibiting superior fluorescent characteristics and superior thermal characteristics with varied colors of emitted light.

公开(公告)号：US20150295162A1

公开(公告)日：2015-10-15

申请号：US14682631

申请日：2015-04-09

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Masato YAMAZAKI ,  Takayuki MATSUOKA ,  Yoshiteru HONDA ,  Kazuaki KITAMURA ,  Hisashi KOZUKA ,  Toshiaki KURAHASHI ,  Yasuyuki OKIMURA ,  Hideto YAMADA ,  Kazushige OHBAYASHI

IPC: H01L41/187 ,  H01L41/43

CPC classification number: H01L41/1873 ,  C04B35/495 ,  C04B2235/3201 ,  C04B2235/3203 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3225 ,  C04B2235/3232 ,  C04B2235/3244 ,  C04B2235/3251 ,  C04B2235/3258 ,  C04B2235/3262 ,  C04B2235/3272 ,  C04B2235/3275 ,  C04B2235/3284 ,  C04B2235/602 ,  C04B2235/768 ,  C04B2235/80 ,  H01L41/43

Abstract: A lead-free piezo-electric porcelain composition which contains a main phase having voids and which is formed of a first crystal phase composed of an alkali niobate/tantalate-based perovskite oxide having piezo-electric characteristics; and a sub-phase containing a second crystal phase composed of an A2B6O13-based compound (where the element A is a monovalent element and the element B is one or more divalent to hexavalent elements). The sub-phase fills voids present in the main phase.

Abstract translation: 一种无铅压电陶瓷组合物，其含有具有空隙的主相，并且由具有压电特性的铌酸盐/钽酸钙类钙钛矿氧化物构成的第一结晶相形成; 以及含有由A2B6O13系化合物（元素A为一价元素，元素B为一价以上的2价〜6价元素）构成的第2结晶相的副相。 子相填充主相中存在的空隙。

公开(公告)号：US20180375299A1

公开(公告)日：2018-12-27

申请号：US16018949

申请日：2018-06-26

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Hideto YAMADA ,  Haruki YOSHIDA ,  Kuniharu TANAKA ,  Michitaka YAMADA ,  Yusuke NOMURA

IPC: H01T13/38 ,  B82Y30/00 ,  C04B35/64

CPC classification number: H01T13/38 ,  B82Y30/00 ,  C04B35/111 ,  C04B35/117 ,  C04B35/62695 ,  C04B35/64 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3227 ,  C04B2235/3418 ,  C04B2235/528 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/6022 ,  C04B2235/785 ,  C04B2235/80 ,  C04B2235/85 ,  C04B2235/96 ,  C04B2235/963 ,  H01T13/60

Abstract: The spark plug includes an insulator formed of an alumina-based sintered body, and the insulator contains Si, B a, and a rare earth element. In an analysis of the insulator by using a scanning transmission electron microscope having an electron-probe diameter of 1 nm, Si and a rare earth element are detected at a crystal grain boundary having a thickness of 15 nm or less, a content of an alkaline earth metal is less than a detection limit at the crystal grain boundary, and a diffraction spot is present in an electron diffraction pattern of a portion where Ba is detected.

公开(公告)号：US20170141292A1

公开(公告)日：2017-05-18

申请号：US15129877

申请日：2015-03-05

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Hisashi KOZUKA ,  Hideto YAMADA ,  Takayuki MATSUOKA ,  Kazuaki KITAMURA ,  Masato YAMAZAKI ,  Toshiaki KURAHASHI ,  Takashi KASASHIMA ,  Yasuyuki OKIMURA ,  Kazushige OHBAYASHI

IPC: H01L41/187 ,  C04B35/64 ,  C04B35/495 ,  H01L41/047 ,  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: A lead-free piezoelectric ceramic composition including an alkali niobate/tantalate perovskite oxide main phase having piezoelectric properties and a different metal oxide subphase. The mole ratio (Na/K) between Na (sodium) and K (potassium) in the main phase assumes a value in a range represented by 0.40 direction with the main phase represented as a pseudo-cubic crystal system.

公开(公告)号：US20210324266A1

公开(公告)日：2021-10-21

申请号：US16973367

申请日：2019-07-17

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Shohei TAKAKU ,  Yusuke KATSU ,  Tsuneyuki ITO ,  Toshiaki KURAHASHI ,  Hideto YAMADA

IPC: C09K11/77 ,  H01L33/50 ,  C09K11/02 ,  C04B35/10

Abstract: In one aspect of the present disclosure, there is provided an optical wavelength conversion member including a polycrystalline ceramic sintered body containing, as main components, Al2O3 crystal grains and crystal grains represented by formula X3Al5O12:Ce. In the optical wavelength conversion member 9, atoms of element X are present also in an Al2O3 crystal grain adjacent to the interface between the Al2O3 crystal grain and an X3Al5O12:Ce crystal grain.

公开(公告)号：US20190241475A1

公开(公告)日：2019-08-08

申请号：US16331655

申请日：2017-09-20

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Yusuke KATSU ,  Toshiaki KURAHASHI ,  Hideto YAMADA ,  Takeshi MITSUOKA

IPC: C04B35/117 ,  B23K20/12 ,  B23B27/14

CPC classification number: C04B35/117 ,  B23B27/14 ,  B23B27/148 ,  B23B2224/00 ,  B23K20/12 ,  B23K20/122 ,  C04B35/645 ,  C04B2235/3217 ,  C04B2235/3847 ,  C04B2235/40 ,  C04B2235/5445

Abstract: An object of the present disclosure is to improve the properties of a ceramic composition. A ceramic composition contains alumina (Al2O3) and tungsten carbide (WC) and is characterized in that an atomic layer formed of at least one element selected from among transition metals belonging to Groups 4 to 6 of the periodic table, yttrium (Y), scandium (Sc), and lanthanoids is present at a crystal grain boundary between an alumina (Al2O3) crystal grain and a tungsten carbide (WC) crystal grain.

公开(公告)号：US20170141293A1

公开(公告)日：2017-05-18

申请号：US15129943

申请日：2015-03-05

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Hisashi KOZUKA ,  Hideto YAMADA ,  Takayuki MATSUOKA ,  Kazuaki KITAMURA ,  Masato YAMAZAKI ,  Toshiaki KURAHASHI ,  Takashi KASASHIMA ,  Yasuyuki OKIMURA ,  Kazushige OHBAYASHI

IPC: H01L41/187 ,  C04B35/64 ,  C04B35/495 ,  H01L41/43 ,  H01L41/047

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: A lead-free piezoelectric ceramic composition including an alkali niobate/tantalate perovskite oxide main phase having piezoelectric properties and a different metal oxide. The mole ratio (Na/K) between Na (sodium) and K (potassium) in the main phase is 0.40 direction with the main phase represented as a pseudo-cubic crystal system. Also, the area ratio of a crystal phase reflecting the second spots in the main phase is 33% or less, and the maximum grain size of crystals reflecting the second spots in the main phase is 25 nm or less.