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    METHOD FOR SYNTHESIZING B1 TYPE TANTALUM NITRIDE
    182.
    发明专利
    METHOD FOR SYNTHESIZING B1 TYPE TANTALUM NITRIDE 失效

    公开(公告)号：JPH0483526A

    公开(公告)日：1992-03-17

    申请号：JP19962290

    申请日：1990-07-27

    Applicant: TOSHIBA TUNGALOY CO LTD

    Inventor： MASHITA SHIGERU ,  NISHIDA MINORU ,  YAMAYA SUSUMU ,  YAMAZAKI HISASHI

    IPC: B01J3/08

    Abstract: PURPOSE:To mass-produce B1 type tantalum nitride near to a stoichiometric compound in a high conversion rate by propagating a shock wave to a starting substance containing hexagonal tantalum nitride to compress the same. CONSTITUTION:The shock wave due to a flight plate 4 accelerated at high speed by the combustion gas of powder is propagated to a holding container 1 receiving a starting substance 3 composed of a powder containing hexagonal tantalum nitride, the compacted powder thereof or the sintered body thereof to convert hexagonal tantalum nitride in the starting substance 3 to B1 type tantalum nitride. Since the yield of B1 type of tantalum nitride is high and mass production is possible and no denitrification is generated in this method, B1 type tantalum nitride from a stoichiometric composition to a non- stoichiometric composition can be easily obtained by controlling the nitrogen content in the starting substance.

    METHOD FOR SYNTHESIZING CUBIC BORON NITRIDE POWDER
    183.
    发明专利
    METHOD FOR SYNTHESIZING CUBIC BORON NITRIDE POWDER 失效

    公开(公告)号：JPH02152540A

    公开(公告)日：1990-06-12

    申请号：JP30495288

    申请日：1988-12-01

    Applicant: NAT INST RES INORGANIC MAT

    Inventor： SEKINE TOSHIMORI

    IPC: B01J3/08

    Abstract: PURPOSE:To produce the cubic boron nitride powder at a low cost by heating the pressure molding of low-pressure phase boron nitride powder and applying impact compression thereto for a short period of time. CONSTITUTION:After the low-pressure phase boron nitride powder having =1musec pressurization time. The cubic boron nitride powder can be synthesized from only the low-pressure phase boron nitride powder as a starting raw and the need for the treatment to remove the metal or the laborious treatment to separate the cubic boron nitride powder from wurtzite type boron nitride is eliminated according to this method, therefore, the cubic boron nitride powder is produced at the low cost.

    METHOD FOR SYNTHESIZING DIAMOND BY EXPLOSION IN WATER
    184.
    发明专利
    METHOD FOR SYNTHESIZING DIAMOND BY EXPLOSION IN WATER 失效

    公开(公告)号：JPH02141414A

    公开(公告)日：1990-05-30

    申请号：JP29580288

    申请日：1988-11-22

    Applicant: AGENCY IND SCIENCE TECHN

    Inventor： OINUMA SENZO ,  NAKAYAMA YOSHIO ,  MATSUNAGA TAKEHIRO ,  IIDA MITSUAKI ,  TANAKA KATSUMI ,  TADA KAZUMI

    IPC: C01B31/06 ,  B01J3/08

    Abstract: PURPOSE:To make it possible to easily repeat explosion by a desired number of repetitions and to facilitate the recovery of a reaction product by exploding a starting material mixture of an explosive with graphite in water. CONSTITUTION:A starting material mixture of an explosive with graphite is press-molded so as to attain >=1.4 g/cm density and the resulting molded body is charged into a pipe with one end or both ends open as required. The molded body or the pipe is suspended in water in a water tank at >=50cm depth of water. After explosion, the supernatant liq. is removed and the deposit is recovered. The metals in the deposit are dissolved and removed with nitric acid, the residual graphite is removed with a mixed soln. of hydrochloric acid and nitric acid and then the deposit is treated with a mixed soln. of hydrofluoric acid and nitric acid to obtain high purity diamond.

    Forming method of amorphous forming body
    190.
    发明专利
    Forming method of amorphous forming body 失效
    非晶形成体的形成方法

    公开(公告)号：JPS597433A

    公开(公告)日：1984-01-14

    申请号：JP11693082

    申请日：1982-07-07

    Applicant: Asahi Chem Ind Co Ltd

    Inventor： TAGO HISAO ,  AHANO TERUYUKI ,  KATSUKI KAZUNORI

    IPC: B01J3/08 ,  B21D26/08 ,  B22F3/00 ,  B22F3/08

    CPC classification number: B22F3/006 ,  B22F3/08

    Abstract: PURPOSE:To obtain a forming body having a fine and uniform layer without damaging its atomic arrangement, by packing a cylindrical metallic vessel with amorphous powder, and compressing coaxially by an explosive of a specified explosion speed. CONSTITUTION:A metallic bottom plug 2 to which a hole is worked is welded to the lower part of a cylindrical metallic vessel 1, and a conduit 6 is connected. Subsequently, a vacuum discharging filter 3 to which metallic powder is pressed is placed and is packed with a semiconductor and a semi-metallic or metallic amorphous powder. Subsequently, the joint part of an upper plug 5 for forming an enclosed vessel is covered with a vacuum compound 15. After the vacuum discharge, the conduit 6 is crushed, stuck closely and cut, also conical clay 8 is placed in order to prevent an impulse wave from the upper part, and also an auxiliary vessel 7 is attached in order to give uniform pressure to the whole vessel. subsequently, said vessel 1 is set by placing a metal center fixing material 9 in the center of an explosive holding cylinder 11. Subsequently, an explosive whose explosion speed is 2,000-5,000m/sec at the time of detonation is loaded, and the explosion is initiated coaxially by an electric detonator 14.

    Abstract translation: 目的：为了获得具有细小而均匀的层而不破坏其原子排列的成形体，通过用无定形粉末填充圆柱形金属容器，并用特定爆炸速度的炸药同轴压缩。 构成：将加工有孔的金属底塞2焊接到圆筒状金属容器1的下部，连接导管6。 随后，放置金属粉末被压制的真空排放过滤器3，并且填充有半导体和半金属或金属无定形粉末。 随后，用真空复合物15覆盖用于形成封闭容器的上塞5的接合部分。在真空排出之后，导管6被压碎，紧密贴合并切割，并且还放置锥形粘土8以防止 上部的冲击波，以及辅助容器7，以便给整个容器提供均匀的压力。 随后，通过将金属中心固定材料9放置在爆炸保持筒11的中心来设定所述容器1.随后，在爆炸时装载爆炸速度为2,000-5,000m / sec的爆炸物，并且爆炸 由电雷管14同轴起动。

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