公开(公告)号：US10745326B2

公开(公告)日：2020-08-18

申请号：US15609387

申请日：2017-05-31

Applicant: NGK Insulators, Ltd.

Inventor： Akinobu Oribe ,  Takahiro Tomita ,  Hiroharu Kobayashi

IPC: C04B38/06 ,  C04B37/00 ,  C04B35/484

Abstract: A porous ceramic structure includes one sheet, and a plurality of porous ceramic particles bonded on the sheet. A gap d formed between adjacent ones of the porous ceramic particles is 10˜80 μm.

公开(公告)号：US10442739B2

公开(公告)日：2019-10-15

申请号：US15221903

申请日：2016-07-28

Applicant: NGK INSULATORS, LTD.

Inventor： Hiroharu Kobayashi

IPC: C04B38/00 ,  C08K7/24 ,  F02F1/42 ,  C04B35/488 ,  C04B35/622 ,  C04B35/626 ,  C04B35/638 ,  C04B35/48 ,  C04B35/634 ,  C04B38/06 ,  C09K21/02 ,  F01N13/08 ,  F01N13/14 ,  C04B111/00 ,  C04B111/28

Abstract: Provided is a porous plate-shaped filler that can be used as a material for a heat-insulation film having excellent heat insulation performance. In a porous plate-shaped filler 1 having a plate shape, an aspect ratio is 3 or higher, a minimum length is 0.5 to 50 μm, and an overall porosity is 20 to 90%, and the porosity is lower in the circumferential part than in the center part. When this porous plate-shaped filler 1 of the present invention is contained in a heat-insulation film, the infiltration of a matrix into the filler is reduced, and thus the thermal conductivity can be lowered. Therefore, even a thin heat-insulation film can have a greater heat-insulation effect than before.

公开(公告)号：US10317004B2

公开(公告)日：2019-06-11

申请号：US15284798

申请日：2016-10-04

Applicant: NGK INSULATORS, LTD.

Inventor： Hiroharu Kobayashi ,  Takahiro Tomita ,  Akinobu Oribe

IPC: C09D7/40 ,  F16L59/02 ,  C09D7/62 ,  C04B38/00 ,  C04B38/06 ,  C09D201/00 ,  C09C1/00 ,  C09C1/30 ,  C09C1/36 ,  C09C1/40 ,  C09C3/00 ,  C09C3/04 ,  C09C3/06 ,  C09C3/10 ,  C09D183/04 ,  C04B35/48

Abstract: A porous plate-shaped filler is a plate shape having an aspect ratio of 3 or more, and has a minimum length of 0.1 to 50 μm and a porosity of 20 to 90%. Furthermore, the porous plate-shaped filler 1 includes plate-shaped pores 2 having an aspect ratio of 1.5 or more. Consequently, in the porous plate-shaped filler, a thermal conductivity is low. The heat insulation film includes the porous plate-shaped filler, whereby a heat insulation effect of the heat insulation film can improve.

公开(公告)号：US20160195344A1

公开(公告)日：2016-07-07

申请号：US15044299

申请日：2016-02-16

Applicant: NGK INSULATORS, LTD.

Inventor： Takahiro Tomita ,  Kenkichi Nagai ,  Hiroharu Kobayashi

IPC: F28F13/00

CPC classification number: F28F13/00 ,  F28F2013/001 ,  F28F2013/005 ,  F28F2013/008 ,  H01L23/3731 ,  H01L23/3733 ,  H01L2924/0002 ,  H01L2924/00

Abstract: The thermal diode is formed of a first material as a ceramic material exhibiting thermal conductivity that increases in a certain temperature range of −200° C. or higher but 1000° C. or lower and a second material exhibiting the thermal conductivity that decreases in the temperature range, the first material and the second material being bonded together. The first material has preferably a microstructure having a characteristic length La of 1 nm to 10 μm.

Abstract translation: 热二极管由作为陶瓷材料的第一材料形成，其具有在-200℃或更高但1000℃或更低的特定温度范围内增加的导热性，并且在第 温度范围，第一材料和第二材料结合在一起。 第一材料优选具有1nm至10μm的特征长度La的微结构。

公开(公告)号：US11059753B2

公开(公告)日：2021-07-13

申请号：US16420334

申请日：2019-05-23

Applicant: NGK INSULATORS, LTD.

Inventor： Yoshimasa Kobayashi ,  Hiroharu Kobayashi ,  Kazuki Iida

IPC: C04B35/581 ,  C04B35/645

Abstract: A method for producing an oriented AlN sintered body includes a first step of preparing a formed body by forming a mixture obtained by mixing a sintering aid with an AlN raw-material powder containing a plate-like AlN powder whose plate surface is a c-plane and which has an aspect ratio of 3 or more and an average thickness of 0.05 to 1.8 μm, wherein the mixture is formed such that the plate surface of the plate-like AlN powder is disposed along a surface of the formed body; and a second step of obtaining an oriented AlN sintered body by subjecting the formed body to hot-press sintering in a non-oxidizing atmosphere while applying a pressure to the surface of the formed body.

公开(公告)号：US20200010374A1

公开(公告)日：2020-01-09

申请号：US16575768

申请日：2019-09-19

Applicant: NGK Insulators, Ltd.

Inventor： Hiroharu Kobayashi ,  Kazuki Iida ,  Yoshimasa Kobayashi

IPC: C04B35/581 ,  C01B21/072 ,  C04B35/63 ,  C04B35/64

Abstract: Aluminum nitride particles used as a material of an aluminum nitride sintered compact are disclosed. The aluminum nitride particles may have a same crystal orientation. The aluminum nitride particles each have an aspect ratio of 3 or more, a plate-like shape, a planar length of 0.6 μm or more and 20 μm or less, and a thickness length of 0.05 μm or more and 2 μm or less.

公开(公告)号：US20180134574A1

公开(公告)日：2018-05-17

申请号：US15869506

申请日：2018-01-12

Applicant: NGK Insulators, Ltd.

Inventor： Hiroharu Kobayashi ,  Takahiro Tomita ,  Akinobu Oribe

IPC: C01G25/02 ,  C04B38/00

CPC classification number: C01G25/02 ,  C04B38/00 ,  C04B2201/32 ,  C04B35/00 ,  C04B38/0054 ,  C04B38/0074

Abstract: A porous ceramic particle has a porosity of 20% to 99%, and one principal surface of the porous ceramic particle is a mirror surface, and an aspect ratio thereof is greater than or equal to 3.

公开(公告)号：US20170349497A1

公开(公告)日：2017-12-07

申请号：US15609421

申请日：2017-05-31

Applicant: NGK Insulators, Ltd.

Inventor： Akinobu ORIBE ,  Takahiro Tomita ,  Hiroharu Kobayashi

IPC: C04B37/00 ,  C04B35/484 ,  C04B38/06 ,  C04B35/626 ,  C04B35/64

CPC classification number: C04B37/001 ,  C04B35/484 ,  C04B35/6261 ,  C04B35/64 ,  C04B37/008 ,  C04B38/067 ,  C04B2235/3225 ,  C04B2235/3246 ,  C04B2235/6025 ,  C04B2235/6567 ,  C04B2235/94 ,  C04B2235/95 ,  C04B2237/348 ,  C04B38/0054 ,  C04B38/0074

Abstract: A porous ceramic structure includes one sheet, and a porous ceramic aggregate bonded on the sheet. The porous ceramic aggregate includes a plurality of porous ceramic particles.

公开(公告)号：US09656920B2

公开(公告)日：2017-05-23

申请号：US15001541

申请日：2016-01-20

Applicant: NGK INSULATORS, LTD.

Inventor： Takahiro Tomita ,  Kenkichi Nagai ,  Hiroharu Kobayashi

IPC: C04B35/565 ,  C04B35/584 ,  C04B35/581 ,  C04B35/575 ,  H01H37/32 ,  C04B38/00

CPC classification number: C04B35/584 ,  C04B35/565 ,  C04B35/575 ,  C04B35/581 ,  C04B38/008 ,  C04B2235/3213 ,  C04B2235/3217 ,  C04B2235/3225 ,  C04B2235/5445 ,  C04B2235/5454 ,  C04B2235/666 ,  C04B2235/781 ,  C04B2235/85 ,  C04B2235/9607 ,  H01H37/32

Abstract: A ceramic material has a characteristic length La of a micro-structure thereof that satisfies 0.1 LAMFP≦La≦100 LAMFP, and has thermal conductivity that monotonously increases from room temperature to 100° C., where LAMFP denotes apparent mean free path of phonons at room temperature, and is defined as LAMFP=(3×thermal conductivity)/(heat capacity×speed of sound). The characteristic length La of the micro-structure is an interval between particles of different type of material when the ceramic material includes a composite material in which the different type of material is dispersed in a base material, is an interval between one pore and another pore when the ceramic material includes a porous body, and is the crystalline particle size (interval between one grain boundary and another grain boundary) when the ceramic material includes a polycrystalline body.

公开(公告)号：US11136271B2

公开(公告)日：2021-10-05

申请号：US16575768

申请日：2019-09-19

Applicant: NGK Insulators, Ltd.

Inventor： Hiroharu Kobayashi ,  Kazuki Iida ,  Yoshimasa Kobayashi

IPC: C04B35/581 ,  C01B21/072 ,  C04B35/63 ,  C04B35/64

Abstract: Aluminum nitride particles used as a material of an aluminum nitride sintered compact are disclosed. The aluminum nitride particles may have a same crystal orientation. The aluminum nitride particles each have an aspect ratio of 3 or more, a plate-like shape, a planar length of 0.6 μm or more and 20 μm or less, and a thickness length of 0.05 μm or more and 2 μm or less.