바륨 나이트라이드

바륨 나이트라이드 C화학적 특성, 용도, 생산

개요

Barium nitride purportedly has the molecular formula of Ba3N2 and the molecular weight of 439.9944 g/mol. Its CAS number is 12047-79-9. It is offered for sale by several reputable manufacturers but the actual composition and identity may not coincide with the formula presented. Although Mg, Ca (and to some extent Sr) forms a number of compounds based upon the general formula M3N2, there is no report in the literature that or Ba forms such compositions. The literature is devoid of any data relating to Ba3N2 and the subnitride is mentioned only in the presence of Sr2N.
Barium nitride has been reported to be metastable and sublimes in the 915 to 1050 C temperature range. The reported equation for this behavior is: log P = 6.38 × 10⁴/T(K) and it decomposes when heated beyond this range to form the metal and nitrogen gas, i.e. it is metastable. Thus, the existence of barium nitride is doubtful and no report of its formation or properties exists to date.

화학적 성질

yellowish brown; -20 mesh, 99.7% purity [CER91] [CIC73]

물리적 성질

Barium–nitride–hydride is one of the fewdocumented H^--ionic conductors. It crystallizes in the a-NaFeO2 structure (space group R_m) with distorted Ba-octahedra centered alternately by H^- and N^3-. Neutron diffraction shows that the hydrogen ions are distributed independent of temperature over lattice sites: 85% on (3a) and 15% on (6c). At T > 525 K a sharp increase of the ionic conductivity can be observed. The diffusion process takes place by uncorrelated jumps of hydrogen ions between regular lattice sites. Using quasielastic neutron scattering techniques and a planar jump diffusion model, we were able to determine the mean residence time on a H^--site to be s = 20 ± 2d ps and the diffusion constant D to be 2.1×10^-5 cm²/s at T = 823 K.
Ba2Nhas been used to produce other subnitrides. Bulk thermal or filament-initiated reactions of mixed powders of transition metal chlorides and Ba3N2 produces transition metal nitrides (TiN, ZrN, HfN, VN, V2N) in good yield. The products were characterized by X-ray powder diffraction, SEM/EDAX, FT-IR, microelemental analysis and imaging XPS. The effect of diluting the reaction by the addition of LiCl was used to lower reaction temperatures and in the case of WCI4 and Li3N produced WN. Reaction propagation was investigated by using various mixtures of nitriding reagent (Li3N, Mg3N2, Ca3N2), this was correlated with T_ad(s), the maximum adiabatic combustion temperature for salt formation only.

용도

Barium nitride is a ceramic that finds use as a dopant in optical materials such as white emitting LEDs. Ba₃N₂ is also used as a synthetic precursor for ternary metal nitrides and as a flux growth medium for GaN.

Safety Profile

A poison by ingestion. Flammableby spontaneous chemical reaction with water to liberateexplosive ammonia gas. Dangerous; explodes uponheating and by spontaneous chemical reaction, liberatingNH3 vapor which can form explosive mixtures with air.Violent

Synthesis

3 Ba + N2 = Ba3N2
The nitriding temperatures for Ba is and 560°C. To achieve complete conversion to the nitride, the heating must be continued for a long time or the temperature must be raised to 700-750°C on cessation of absorption of N2 .

바륨 나이트라이드 준비 용품 및 원자재

원자재

준비 용품

바륨 나이트라이드 공급 업체

공급자	전화	이메일	국가	제품 수	이점
ShanDong Look Chemical Co.,Ltd.	+8617653113219	sales01@sdlookchemical.com	China	2739	58
Shaanxi Didu New Materials Co. Ltd	+86-89586680 +86-13289823923	1026@dideu.com	China	9003	58
Shanghai Acmec Biochemical Technology Co., Ltd.	+undefined18621343501	product@acmec-e.com	China	33350	58
Aladdin Scientific	+1-+1(833)-552-7181	sales@aladdinsci.com	United States	57511	58
J & K SCIENTIFIC LTD.	010-82848833 400-666-7788	jkinfo@jkchemical.com	China	94717	76
Shanghai Aladdin Bio-Chem Technology Co.,LTD	400-400-6206333 18521732826	market@aladdin-e.com	China	25013	65
Sigma-Aldrich	021-61415566 800-8193336	orderCN@merckgroup.com	China	51471	80
Guangdong wengjiang Chemical Reagent Co., Ltd.	0751-2815688 13927872512	3007421951@qq.com	China	10065	58
Shenzhen Polymeri Biochemical Technology Co., Ltd.	+86-400-002-6226 13028896684	sales@rrkchem.com	China	56070	58
Energy Chemical	021-58432009 400-005-6266	marketing1@energy-chemical.com	China	44843	58

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