Central Glass Company, Limited

Other

Asahi Kasei Kogyo Kabushiki Kaisha

Agency of Industrial Science and Technology

Applied Science Research Institute

Masayuki Kawaguchi

Nobuatsu Watanabe

Tsuyoshi Nakajima

Yasushi Kita

Koji Nozaki

Tamikuni Komatsu

Tadayuki Kawashima

Shuzo Fujiwara

Shu Usuba

Yozo Kakudate

Masatake Yoshida

Katsuharu Kasami

Katsutoshi Aoki

Kayoko Yamamoto

Hiroyuki Yokoi

In order to produce a new substance having a diamond crystal structure, the following steps are taken in order. First, a graphite-like substance is prepared which contains boron (B), carbon (C) and nitrogen (N) as main elements. Then, the graphite-like substance is mixed with a metal powder to produce a mixture. Then, a pressure is applied to the mixture to produce a molded body, and then an explosion pressure is applied to the molded body.

Polycrystalline BCN substance and method of producing same

Metal containing compounds having a graphite-like layer structure are derived from poly(amino-s-triazine), [A], which has a layer structure and is represented by (C.sub.3 N.sub.3).sub.2 N.sub.x H.sub.y, where 2.ltoreq.x.ltoreq.4, and 0.ltoreq.y.ltoreq.8. Reaction of [A] with a transition metal M at 400.degree.-1000.degree. C. gives a compound represented by C.sub.a NH.sub.b M.sub.c, where 0.6.ltoreq.a.ltoreq.20.0, 0.ltoreq.b.ltoreq.1.0, and 0.001.ltoreq.c.ltoreq.0.5. This compound exhibits magnetism. Reaction of [A] with a halide of a transition metal or aluminum at 200.degree.-500.degree. C. gives C.sub.6 N.sub.p H.sub.q M.sub.r X.sub.s, where M is a transition metal or Al, X is a halogen, 8.ltoreq.p.ltoreq.10, 0.ltoreq.q.ltoreq.10, 0.6.ltoreq.r.ltoreq.1.5, and 0.ltoreq.s.ltoreq.1. When M is a transition metal the compound exhibits paramagnetism. When X is Al, heating of a powder of the compound at 800.degree.-950.degree. C. provides an AlN powder coated with an amorphous organic substance composed of C, N and H and, hence, protected against oxidation. The same coated AlN powder is obtained also by reacting a powder of [A] with an aluminum halide at 800.degree.-950.degree. C. By heating the coated AlN powder at a temperature above 1000.degree. C. the amophous organic coating sublimates and decomposes to leave a pure AlN powder which is suitable for sintering.

Metal containing derivatives of aminotriazine polymer and method of

The invention provides a lithium secondary battery using hydric boron carbonitride which is a layered compound represented by BC.sub.x N.sub.y H.sub.z, where 0.5.ltoreq.x.ltoreq.12, 0.7.ltoreq.y.ltoreq.1.5, and 0.01.ltoreq.z.ltoreq.3, as the active material of the negative electrode. This compound is obtained by a CVD process. The electrolyte is a solution of a lithium salt in an organic solvent. The material of the positive electrode is an oxide such as MnO.sub.2 or V.sub.2 O.sub.5, a sulfide such as MoS.sub.2 or TiS.sub.2 or a conductive organic polymer such as polyaniline. In this secondary battery Li is smoothly intercalated in and released from the hydric boron carbonitride of the negative electrode, and the energy density with respect to the active material of the negative electrode is sufficiently high. This battery bears a fairly large number of charge-discharge cycles. Also it is possible to use hydric boron carbonitride as the active material of the positive electrode of a lithium secondary battery in combination with negative electrode of metallic Li or hydric boron carbonitride with intercalation of a larger amount of Li.

Lithium secondary battery using hydric boron carbonitride as electrode

A polymeric compound, named poly(amino-s-triazine), which has a layer structure with a structural unit represented by (C.sub.3 N.sub.3).sub.2 N.sub.x H.sub.y, where 2.ltoreq.x.ltoreq.4 and 0.ltoreq.y.ltoreq.8, is obtained by reaction of cyanuric trichloride with ammonia or melamine. This compound is stable in the air up to about 400.degree. C. and exhibits fluorescence by excitation at wavelength of 365 nm. When the above reaction is carried out at a temperature ranging from room tempertaure to about 400.degree. C. the product is an oligomeric compound (C.sub.3 N.sub.3).sub.a (NH).sub.b (NH.sub.2).sub.c Cl.sub.d, where 2.ltoreq.a.ltoreq.10, 1.ltoreq.b.ltoreq.10, 0.ltoreq.c.ltoreq.11 and 1.ltoreq.d.ltoreq.12, and poly(amino-s-triazine) is obtained by heating the oligomeric compound at 400.degree.-600.degree. C. in an inactive gas. The oligomeric compound too exhibits fluorescence and is higher in fluorescence intensity. An alkali metal ion can be introduced into poly(amino-s-triazine) by treatment with an alkali metal hydroxide solution, or hydroxyl group can be introduced by treatment with a mineral acid. In either case the modified polymer is very higher in fluorescence intensity and narrower in the width of flurorescence peak.

Aminotriazine polymers and method of preparing same

A novel ternary intercalation compound of a graphite with an alkali metal fluoride and fluorine, which is represented by the formula C.sub.x F(MF).sub.y wherein M is an alkali metal is produced by reacting a graphite material with an alkali metal fluoride in an atmosphere of fluorine gas at a temperature of 0.degree. C. to 250.degree. C. for at least a period of time to effect a weight increase in the graphite. The ternary graphite intercalation compound thus obtained has not only an excellent stability to humidity or moisture but also a high electrical conductivity. The novel ternary graphite intercalation compound according to the present invention may be practically used as a novel electrically conductive material and a catalyst of organic reactions.

Ternary intercalation compound of a graphite with an alkali metal

A novel ternary intercalation compound of a graphite with a metal fluoride and fluorine, which is represented by the formula C.sub.x F(MF.sub.z).sub.y wherein M is a metal is produced by reacting a graphite material with a metal fluoride in an atmosphere of fluorine gas at a temperature of 0.degree. C. to 400.degree. C. for at least a period of time to effect a weight increase in the graphite. The ternary graphite intercalation compound thus obtained has not only an excellent stability to humidity or moisture but also a high electrical conductivity. The novel ternary graphite intercalation compound according to the present invention may be practically used as a novel electrically conductive material and a catalyst of organic reactions.

Ternary intercalation compound of a graphite with a metal fluoride and

A novel ternary intercalation compound of a graphite with a metal fluoride and fluorine, which is represented by the formula C.sub.x F(MF.sub.z).sub.y wherein M is Al or Mg and z is an integer corresponding to the valence of M, is produced by contacting a graphite material with a metal fluoride selected from AlF.sub.3 and MgF.sub.2 in an atmosphere of fluorine gas at a temperature of 0.degree. C. to 400.degree. C. for at least a period of time to effect a weight increase in the graphite. The ternary graphite intercalation compound thus obtained has not only an excellent stability to humidity or moisture but also a high electrical conductivity. The novel ternary graphite intercalation compound according to the present invention may be practically used as a novel electrically conductive material and a catalyst of organic reactions.

A graphite fluoride comprising mainly poly-dicarbon monofluoride represented by the formula (C.sub.2 F).sub.n can be produced in an extremely short period of time by a process comprising reacting a graphite material with fluorine in the presence of a specific fluoride.

Process for producing a graphite fluoride comprising mainly polydicarbon

A novel intercalation compound of a graphite with a thiazyl salt represented by the formula Z.S.sub.4 N.sub.4.2SbCl.sub.5 wherein Z stands for C.sub.24, pyrolytic carbon or pyrolytic graphite is prepared by reacting a graphite material with trithiazyl trichloride and antimony trichloride in the presence of a non-polar solvent. The graphite intercalation compound thus obtained has not only an excellent stability to humidity or moisture but also a high electrical conductivity. The novel intercalation compound according to the present invention may be practically used as a novel electrically conductive material and a catalyst of organic reactions.

Growing community of inventors

Wakayama, Japan

Masayuki Kawaguchi