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titanium diboride

中文名称
——
中文别名
——
英文名称
titanium diboride
英文别名
——
titanium diboride化学式
CAS
——
化学式
B2Ti
mdl
——
分子量
69.502
InChiKey
HGTFSJMXSINNLF-UHFFFAOYSA-N
BEILSTEIN
——
EINECS
——
  • 物化性质
  • 计算性质
  • ADMET
  • 安全信息
  • SDS
  • 制备方法与用途
  • 上下游信息
  • 反应信息
  • 文献信息
  • 表征谱图
  • 同类化合物
  • 相关功能分类
  • 相关结构分类

计算性质

  • 辛醇/水分配系数(LogP):
    -2.37
  • 重原子数:
    3.0
  • 可旋转键数:
    0.0
  • 环数:
    0.0
  • sp3杂化的碳原子比例:
    0.0
  • 拓扑面积:
    0.0
  • 氢给体数:
    0.0
  • 氢受体数:
    0.0

反应信息

  • 作为反应物:
    描述:
    titanium diborideair 作用下, 以 solid 为溶剂, 生成 rutile
    参考文献:
    名称:
    Oxidation Kinetics and Mechanisms of Hot-Pressed TiB2-MoSi2Composites
    摘要:
    The densification of titanium diboride (TiB2) at lower sintering temperature requires the use of sinter‐aid. However, from the high temperature application point of view, it is important to assess whether the presence of sinter‐aid degrades the material properties, including the oxidation resistance. In the present work, the isothermal oxidation behavior of TiB2xwt% MoSi2(x=0, 2.5, and 10) composites was carried out using thermogravimetric analyzer in order to study the effect of MoSi2content on the oxidation kinetics of TiB2at 1200°C for a duration of 12 h. The oxidized surface of monolithic TiB2composed of highly textured rod‐like rutile (TiO2) crystals. In contrast, the oxide scales on TiB2–MoSi2materials consist of a thin layer of SiO2along with TiO2. Interestingly, the analysis of the continuous measurements of the weight gain reveals parabolic rate law of oxidation for all the investigated ceramics. However, the oxidation kinetics is slower for the TiB2‐10 wt% MoSi2, probably due to the presence of SiO2in the oxide scale.
    DOI:
    10.1111/j.1551-2916.2008.02656.x
  • 作为产物:
    描述:
    Ti(BH4)3(1,2-dimethoxyethane) 以 neat (no solvent) 为溶剂, 生成 titanium diboride
    参考文献:
    名称:
    生长抑制以增强薄膜化学气相沉积中的保形覆盖
    摘要:
    我们介绍了使用生长抑制剂来增强低温化学气相沉积中的薄膜保形性。当在其中一种薄膜生长副产品 1,2-二甲氧基乙烷 (dme) 存在下生长时,从单一源前体 Ti(BH(4))(3)(dme) 生长的 TiB(2) 薄膜具有更高的保形性)。这种效应可以用两种替代的抑制机制来解释:一种涉及表面反应位点的封闭,这相当于降低导致膜生长的正向反应的速率,另一种类似于勒夏特列原理,其中加入反应产物增加了逆反应的速率。生长速率的降低对应于前体粘附概率的降低,
    DOI:
    10.1021/ja807802r
  • 作为试剂:
    描述:
    甲醇titanium diboridedioxide titanium 作用下, 生成 聚合甲醛甲酸
    参考文献:
    名称:
    陶瓷-电催化剂/TiO2上甲醇水溶液的光催化氢演化
    摘要:
    已经研究了负载有各种过渡金属硼化物、氮化物、磷化物、碳化物的 TiO2 粉末从甲醇水溶液中光催化析氢的活性。已经发现,WC/TiO2 的活性最高,是铂黑/TiO2 的四分之一。
    DOI:
    10.1246/cl.1983.577
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文献信息

  • New criteria for the applicability of combustion synthesis: The investigation of thermodynamic and kinetic processes for binary Chemical Reactions
    作者:Xiaoming Tan、Xianli Su、Yonggao Yan、Ctirad Uher、Qingjie Zhang、Xinfeng Tang
    DOI:10.1016/j.jallcom.2020.158465
    日期:2021.4
    Combustion synthesis is a novel technique that utilizes the exothermic heat of a chemical reaction to maintain the reaction and to rapidly prepare materials. But, hitherto, none of unified criterion for the validation of combustion synthesis has been proposed. Herein, we proposed the conditions need to be met. In terms of kinetics, at the adiabatic temperature (Tad), the diffusion distance of atoms
    燃烧合成是一种利用化学反应的放热来维持反应并快速制备材料的新技术。但是,迄今为止,尚未提出用于验证燃烧合成的统一标准。在此,我们提出了需要满足的条件。就动力学而言,在绝热温度(T ad)下,原子的扩散距离(升Ť广告)在0.1 s内应大于反应物的粒径(d), 那是, 升Ť广告≥d。对于满足T ad / T m,L的系统≥1(其中T m,L是反应物的低熔点成分的熔点),液相的存在将原子的扩散距离从纳米显着增加到数十微米,从而成为标准升Ť广告≥d简化为T ad / T m,L≥在大多数情况下为1。在热力学方面,系统需要确保反应成分处于激活状态,即T ad / T m,H ≥0.7,其中T m,H是高熔点组分的熔点。本研究提出的SHS反应标准进一步提高了对SHS反应的理论理解,并为探索二元和多组分化合物的超快合成提供了指导。
  • The Unexpected Formation of MB <sub>2</sub> Layers (M = Refractory Metal) on Metal Surfaces
    作者:Wibke Friedhoff、Edgar Milke、Michael Binnewies
    DOI:10.1002/ejic.201001064
    日期:2011.8
    The reactions between refractory metals (Ti, Zr, V, Nb, Ta, Mo, W) and BCl3 vapour at high temperatures have been studied. For this purpose, the metal wires were heated up by an electrical current in a BCl3 atmosphere for a couple of hours. Optical and X-ray diffraction methods were used to analyze the solid products, whereas mass spectrometry was used to study the gas phase composition. In the reactions
    研究了难熔金属(Ti、Zr、V、Nb、Ta、Mo、W)与 BCl3 蒸气在高温下的反应。为此,金属线在 BCl3 气氛中通过电流加热几个小时。光学和 X 射线衍射方法用于分析固体产物,而质谱法用于研究气相组成。在与 Ti、Zr、V、Nb 和 Ta 的反应中,我们观察到在金属表面形成 MB2 层。钼与 MoB 反应形成,与钨完全没有反应。这与热力学预期相反。从热力学的角度讨论了涂层过程的机理。
  • Manipulating solar absorption and electron transport properties of rutile TiO2 photocatalysts via highly n-type F-doping
    作者:Wen Qi Fang、Xue Lu Wang、Haimin Zhang、Yi Jia、Ziyang Huo、Zhen Li、Huijun Zhao、Hua Gui Yang、Xiangdong Yao
    DOI:10.1039/c3ta13917d
    日期:——
    In this work, we report a facile and nontoxic one-pot hydrothermal method for synthesizing F-doped rutile single crystalline TiO2 with tuneable solar absorption. The optical band gap of the catalyst can be easily manipulated from 3.05 to 2.58 eV via altering the initial F : Ti molar ratio of reaction precursors. The photoanodes made of rutile TiO2 single crystals with appropriate F-doping concentration show excellent photoelectrocatalytic activity towards water oxidation under ultraviolet and visible light illumination. The best photoelectrocatalytic performance under UV irradiation can be obtained by F-doped TiO2 with an initial F : Ti molar ratio of 0.1, which is almost 15 times higher than that of un-doped TiO2. Further, the F-doped TiO2 photoanodes also exhibit superior photoelectrocatalytic activity under visible irradiation, and the best performance can be achieved by F-doped TiO2 photoanode with an initial F : Ti molar ratio of 0.05. The superior photoelectrocatalytic activity could be attributed to the highly n-type dopant introduced by fluorine, which significantly tunes the electrical conductivities and band structures of the resulting TiO2 photoanodes, and thus the photoelectrocatalytic activities under both UV and visible irradiation. Different techniques have been employed to characterize the electrical conductivity, charge carrier density and band structures of the F-doped rutile TiO2 films, such as photoelectrochemical method, electrical impedance spectroscopy (EIS) measurements, Mott–Schottky plots and XPS valence band spectra.
    在这项工作中,我们报告了一种简便、无毒的一锅水热法合成掺杂 F 的金红石单晶 TiO2,该方法具有可调的太阳能吸收能力。通过改变初始 F :钛摩尔比。在紫外线和可见光的照射下,由金红石型二氧化钛单晶制成的光阳极在氧化水方面表现出优异的光电催化活性。初始 F :钛摩尔比为 0.1,比未掺杂的二氧化钛高出近 15 倍。此外,掺杂 F 的 TiO2 光阳极在可见光辐照下也表现出卓越的光电催化活性,初始 F :钛摩尔比为 0.05。卓越的光电催化活性可归因于氟引入的高 n 型掺杂剂,它显著地调整了所得 TiO2 光阳极的电导率和能带结构,从而提高了其在紫外和可见光照射下的光电催化活性。我们采用了不同的技术来表征掺杂氟的金红石二氧化钛薄膜的导电性、电荷载流子密度和能带结构,如光电化学法、电阻抗光谱(EIS)测量、Mott-Schottky 图和 XPS 价带光谱。
  • High critical current density of MgB2 bulk superconductor doped with Ti and sintered at ambient pressure
    作者:Y. Zhao、Y. Feng、C. H. Cheng、L. Zhou、Y. Wu、T. Machi、Y. Fudamoto、N. Koshizuka、M. Murakami
    DOI:10.1063/1.1396629
    日期:2001.8.20
    Ti-doped MgB2 superconductors with different doping levels were prepared by solid-state reaction at ambient pressure. The density, diamagnetic signal, and Jc of the samples change significantly with the doping level, with the best result achieved at x=0.1. At 5 K, the Jc reaches 2×106 A/cm2 in the self-field and 5×104 A/cm2 in 5 T. At 20 K, the Jc is still as high as 1.3×106 A/cm2 in the self-field
    在常压下通过固态反应制备了具有不同掺杂水平的 Ti 掺杂的 MgB2 超导体。样品的密度、抗磁信号和 Jc 随掺杂水平发生显着变化,在 x=0.1 时获得最佳结果。在 5 K 时,Jc 在自场中达到 2×106 A/cm2,在 5 T 时达到 5×104 A/cm2。在 20 K 时,自场中 Jc 仍然高达 1.3×106 A/cm2场和 9.4×104 A/cm2 in 2 T。据观察,Ti 掺杂的样品发生部分熔化,导致良好的晶粒连接和极高的密度。此外,Ti 掺杂诱导的第二相的一些细小颗粒(尺寸从 10 到 100 nm)分布在 MgB2 基体中,这可能在增强磁通钉扎中起重要作用。
  • Ball Milling-Induced Combustion in Powder Mixtures Containing Titanium, Zirconium, or Hafnium
    作者:L. Takacs
    DOI:10.1006/jssc.1996.0267
    日期:1996.8
    induces self propagating high temperature reactions in many highly exothermic powder mixtures. This phenomenon has been studied in a variety of reactions with titanium, zirconium, and hafnium. Several oxides (CuO, Cu2O, NiO, Fe3O4, and ZnO) were reduced with Ti, Zr, and Hf and the borides, carbides, silicides, and sulfides of these metals were prepared from elemental mixtures. The ignition time is much shorter
    球磨在许多高度放热的粉末混合物中引起自蔓延的高温反应。已经在与钛,锆和ha的各种反应中研究了这种现象。用Ti,Zr和Hf还原了几种氧化物(CuO,Cu 2 O,NiO,Fe 3 O 4和ZnO),并从元素混合物中制备了这些金属的硼化物,碳化物,硅化物和硫化物。当氧气或硫参与反应时,Zr的点火时间比Ti或Hf的点火时间短得多,但是对于硼化物,碳化物和硅化物的形成没有观察到类似的变化。提示氧在ZrO 2中快速扩散,而硫很可能在ZrS 2中扩散对此行为负责。
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