公开(公告)号：US11634327B2

公开(公告)日：2023-04-25

申请号：US16831327

申请日：2020-03-26

Applicant: YANSHAN UNIVERSITY

Inventor： Zhisheng Zhao ,  Kun Luo ,  Bing Liu ,  Wentao Hu ,  Lei Sun ,  Julong He ,  Dongli Yu ,  Yongjun Tian ,  Bo Xu ,  Zhongyuan Liu

IPC: C01B32/05 ,  B24D3/00 ,  H01L29/16

Abstract: The present disclosure belongs to the technical filed of new carbon materials and relates to a novel sp2-sp3 hybrid crystalline carbon named Gradia and its preparation process. A novel sp2-sp3 hybrid carbon named Gradia is synthesized using sp2 hybrid carbon as raw materials under high temperature and high pressure. The basic structural units of Gradia are composed of sp2 hybrid graphite-like structural units and sp3 hybrid diamond-like structural units. Gradia disclosed in the present disclosure is a class of new sp2-sp3 hybrid carbon allotrope, whose crystal structure can vary with the widths and/or crystallographic orientation relationships of internal sp2 and/or sp3 structural units.

公开(公告)号：US11312660B2

公开(公告)日：2022-04-26

申请号：US16829362

申请日：2020-03-25

Applicant: YANSHAN UNIVERSITY

Inventor： Zhisheng Zhao ,  Yang Zhang ,  Yingju Wu ,  Shuangshuang Zhang ,  Wentao Hu ,  Dongli Yu ,  Julong He ,  Bo Xu ,  Zhongyuan Liu ,  Yongjun Tian

IPC: C04B35/583

Abstract: The present disclosure relates to a dense boron nitride ceramic with high plasticity and high elasticity and the preparation process thereof. The preparation process includes the following steps: A) weighing a predetermined amount of spherical boron nitride nano-powders with onion-like structure, pre-pressing them into a pre-pressed body and putting the pre-pressed body into a sintering mold; B) putting the pre-pressed body obtained in step A) together with the sintering mold into a spark plasma sintering apparatus or a hot-pressing sintering apparatus for sintering; and C) taking out the mold after cooling, and removing the mold to obtain the boron nitride dense ceramic block with high plasticity and high elasticity. According to the present invention, a boron nitride ceramic with high strength and high plasticity is obtained via sintering spherical boron nitride nano-powders with onion-like structure.

公开(公告)号：US09422161B2

公开(公告)日：2016-08-23

申请号：US14407017

申请日：2013-08-02

Applicant: YANSHAN UNIVERSITY

Inventor： Yongjun Tian ,  Dongli Yu ,  Bo Xu ,  Julong He ,  Zhongyuan Liu ,  Wentao Hu ,  Kun Luo ,  Yufei Gao ,  Zhisheng Zhao

IPC: B01J3/06 ,  B82Y30/00 ,  C01B21/064 ,  C04B35/645 ,  C04B35/5831

CPC classification number: C01B21/0648 ,  B01J3/062 ,  B01J2203/0645 ,  B01J2203/066 ,  B82Y30/00 ,  C01P2002/60 ,  C01P2002/72 ,  C01P2004/02 ,  C01P2004/04 ,  C01P2004/64 ,  C04B35/5831 ,  C04B35/645 ,  C04B2235/52 ,  C04B2235/5409 ,  C04B2235/5454 ,  C04B2235/723 ,  C04B2235/781 ,  C04B2235/96

Abstract: The invention relates to an ultrahard nanotwinned boron nitride bulk material and synthetic method thereof. Particularly, the invention discloses a nanocrystalline cubic boron nitride bulk material containing high density of twins and synthetic method thereof, in which a nanotwinned boron nitride bulk are synthesized from nanospherical boron nitride particles (preferably with a size of 5-70 nm) with onion-like structure as raw materials by using high temperature and high pressure synthesis. As compared with the prior arts, the nanotwinned boron nitride bulk obtained according to the invention has a much higher hardness than that of a normal cubic boron nitride single crystal. The nanotwinned boron nitride bulk has great prospects in applications, such as precision and ultra-precision machining, abrasives, drawing dies, and special optics as well as other fields.

Abstract translation: 本发明涉及一种超硬纳米结晶氮化硼体材料及其合成方法。 特别地，本发明公开了一种含有高密度双胞胎的纳米晶体立方氮化硼体材料及其合成方法，其中由纳米球形氮化硼体系由纳米球形氮化硼颗粒（优选尺寸为5-70nm）与洋葱 - 通过使用高温高压合成作为原料。 与现有技术相比，根据本发明获得的纳米结晶氮化硼体积具有比正常立方氮化硼单晶高得多的硬度。 纳米结晶氮化硼体积在精密和超精密加工，磨料，拉丝模，特殊光学以及其他领域的应用前景广阔。

公开(公告)号：US11708268B2

公开(公告)日：2023-07-25

申请号：US17039194

申请日：2020-09-30

Applicant: YANSHAN UNIVERSITY

Inventor： Zhisheng Zhao ,  Kun Luo ,  Lei Sun ,  Bing Liu ,  Wentao Hu ,  Julong He ,  Dongli Yu ,  Yongjun Tian ,  Bo Xu ,  Zhongyuan Liu

IPC: C01B21/064

CPC classification number: C01B21/0648 ,  C01P2002/01 ,  C01P2002/76 ,  C01P2002/77

Abstract: The present disclosure relates to a novel sp2-sp3 hybrid crystalline boron nitride and its preparation process. A novel sp2-sp3 hybrid crystalline boron nitride allotrope, named Gradia BN, is synthesized using sp2 or sp3 hybridized boron nitride as raw materials under high-temperature and high-pressure. The basic structural units of Gradia BN are composed of sp2 hybridized graphite-like structural units and sp3 hybridized diamond-like structural units. Gradia BN disclosed in the present disclosure is a class of new sp2-sp3 hybrid boron nitride allotrope, whose crystal structure can vary with the widths and/or crystallographic orientation relationships of internal sp2 and/or sp3 structural units, and may have variable physical properties.

公开(公告)号：US20210323822A1

公开(公告)日：2021-10-21

申请号：US17039194

申请日：2020-09-30

Applicant: YANSHAN UNIVERSITY

Inventor： Zhisheng Zhao ,  Kun Luo ,  Lei Sun ,  Bing Liu ,  Wentao Hu ,  Julong He ,  Dongli Yu ,  Yongjun Tian ,  Bo Xu ,  Zhongyuan Liu

IPC: C01B21/064

Abstract: The present disclosure relates to a novel sp2-sp3 hybrid crystalline boron nitride and its preparation process. A novel sp2-sp3 hybrid crystalline boron nitride allotrope, named Gradia BN, is synthesized using sp2 or sp3 hybridized boron nitride as raw materials under high-temperature and high-pressure. The basic structural units of Gradia BN are composed of sp2 hybridized graphite-like structural units and sp3 hybridized diamond-like structural units. Gradia BN disclosed in the present disclosure is a class of new sp2-sp3 hybrid boron nitride allotrope, whose crystal structure can vary with the widths and/or crystallographic orientation relationships of internal sp2 and/or sp3 structural units, and may have variable physical properties.

公开(公告)号：US10160654B2

公开(公告)日：2018-12-25

申请号：US14540836

申请日：2014-11-13

Applicant: Yanshan University

Inventor： Yongjun Tian ,  Quan Huang ,  Dongli Yu ,  Bo Xu ,  Julong He ,  Zhongyuan Liu ,  Wentao Hu ,  Zhisheng Zhao

IPC: C01B32/25

Abstract: The present invention relates to ultrahard nanotwinned diamond bulk materials and synthetic method thereof. In particular, the present invention discloses a diamond bulk material containing high density of nanocrystalline twins and synthetic method thereof, in which a nanotwinned diamond bulk is synthesized from particles of nanospherical onion-like carbon without diamond core (preferably with a size of 5-70 nm) as raw materials by using high temperature and high pressure synthesis. As compared with the prior art, the nanotwinned diamond bulk obtained according to the present invention has a much higher hardness than that of single crystal diamond and that of ultrahard polycrystalline diamond. The nanotwinned diamond bulk has wide prospects in various applications, including geological drilling, machining fields such as high speed cutting and precision and ultra-precision machining, abrasives, drawing dies, and special optics as well as other fields.

公开(公告)号：US20210061719A1

公开(公告)日：2021-03-04

申请号：US16829362

申请日：2020-03-25

Applicant: YANSHAN UNIVERSITY

Inventor： Zhisheng Zhao ,  Yang Zhang ,  Yingju Wu ,  Shuangshuang Zhang ,  Wentao Hu ,  Dongli Yu ,  Julong He ,  Bo Xu ,  Zhongyuan Liu ,  Yongjun Tian

IPC: C04B35/583

Abstract: The present disclosure relates to a dense boron nitride ceramic with high plasticity and high elasticity and the preparation process thereof. The preparation process includes the following steps: A) weighing a predetermined amount of spherical boron nitride nano-powders with onion-like structure, pre-pressing them into a pre-pressed body and putting the pre-pressed body into a sintering mold; B) putting the pre-pressed body obtained in step A) together with the sintering mold into a spark plasma sintering apparatus or a hot-pressing sintering apparatus for sintering; and C) taking out the mold after cooling, and removing the mold to obtain the boron nitride dense ceramic block with high plasticity and high elasticity. According to the present invention, a boron nitride ceramic with high strength and high plasticity is obtained via sintering spherical boron nitride nano-powders with onion-like structure.

公开(公告)号：US20210039950A1

公开(公告)日：2021-02-11

申请号：US16831327

申请日：2020-03-26

Applicant: YANSHAN UNIVERSITY

Inventor： Zhisheng Zhao ,  Kun Luo ,  Bing Liu ,  Wentao Hu ,  Lei Sun ,  Julong He ,  Dongli Yu ,  Yongjun Tian ,  Bo Xu ,  Zhongyuan Liu

IPC: C01B32/05 ,  B24D3/00 ,  H01L29/16

Abstract: The present disclosure belongs to the technical filed of new carbon materials and relates to a novel sp2-sp3 hybrid crystalline carbon named Gradia and its preparation process. A novel sp2-sp3 hybrid carbon named Gradia is synthesized using sp2 hybrid carbon as raw materials under high temperature and high pressure. The basic structural units of Gradia are composed of sp2 hybrid graphite-like structural units and sp3 hybrid diamond-like structural units. Gradia disclosed in the present disclosure is a class of new sp2-sp3 hybrid carbon allotrope, whose crystal structure can vary with the widths and/or crystallographic orientation relationships of internal sp2 and/or sp3 structural units.

公开(公告)号：US20150158727A1

公开(公告)日：2015-06-11

申请号：US14407017

申请日：2013-08-02

Applicant: YANSHAN UNIVERSITY

Inventor： Yongjun Tian ,  Dongli Yu ,  Bo Xu ,  Julong He ,  Zhongyuan Liu ,  Wentao Hu ,  Kun Luo ,  Yufei Gao ,  Zhisheng Zhao

IPC: C01B21/064 ,  B01J3/06

CPC classification number: C01B21/0648 ,  B01J3/062 ,  B01J2203/0645 ,  B01J2203/066 ,  B82Y30/00 ,  C01P2002/60 ,  C01P2002/72 ,  C01P2004/02 ,  C01P2004/04 ,  C01P2004/64 ,  C04B35/5831 ,  C04B35/645 ,  C04B2235/52 ,  C04B2235/5409 ,  C04B2235/5454 ,  C04B2235/723 ,  C04B2235/781 ,  C04B2235/96

Abstract: The invention relates to an ultrahard nanotwinned boron nitride bulk material and synthetic method thereof. Particularly, the invention discloses a nanocrystalline cubic boron nitride bulk material containing high density of twins and synthetic method thereof, in which a nanotwinned boron nitride bulk are synthesized from nanospherical boron nitride particles (preferably with a size of 5-70 nm) with onion-like structure as raw materials by using high temperature and high pressure synthesis. As compared with the prior arts, the nanotwinned boron nitride bulk obtained according to the invention has a much higher hardness than that of a normal cubic boron nitride single crystal. The nanotwinned boron nitride bulk has great prospects in applications, such as precision and ultra-precision machining, abrasives, drawing dies, and special optics as well as other fields.

Abstract translation: 本发明涉及一种超硬纳米结晶氮化硼体材料及其合成方法。 特别地，本发明公开了一种含有高密度双胞胎的纳米晶体立方氮化硼体材料及其合成方法，其中由纳米球形氮化硼体系由纳米球形氮化硼颗粒（优选尺寸为5-70nm）与洋葱 - 通过使用高温高压合成作为原料。 与现有技术相比，根据本发明获得的纳米结晶氮化硼体积具有比正常立方氮化硼单晶高得多的硬度。 纳米结晶氮化硼体积在精密和超精密加工，磨料，拉丝模，特殊光学以及其他领域的应用前景广阔。

公开(公告)号：US12024432B2

公开(公告)日：2024-07-02

申请号：US17842276

申请日：2022-06-16

Applicant: YANSHAN UNIVERSITY

Inventor： Zhisheng Zhao ,  Yingju Wu ,  Zitai Liang ,  Yang Zhang ,  Xiaoyu Wang ,  Zewen Zhuge ,  Julong He ,  Dongli Yu ,  Bo Xu ,  Yongjun Tian

IPC: C01B32/05

CPC classification number: C01B32/05 ,  C01P2002/60 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/04 ,  C01P2004/84 ,  C01P2006/10 ,  C01P2006/16 ,  C01P2006/21 ,  C01P2006/90

Abstract: The application provides a porous carbon block material having high elasticity and high sealing, and provides a method for preparing the same. Particularly, the present application provides a porous carbon block material, wherein the porous carbon block material has a pore size in the range of from 3 nm to 100 nm, a porosity of from 50% to 87%, and the pores in the material are closed pores. In addition, the application provides a method for preparing the porous carbon block material according to the present application. The porous carbon block material according to the present application has small pore size, high porosity, and closed pores, and thus has high strength combined with high elasticity, high sealing property, and low density. Hence, the porous carbon block material according to the present application may be used as a sealing material.