bismuth molybdenum oxide | 103715-01-1

• 英文名称: bismuth molybdenum oxide
• CAS: 103715-01-1
• 化学式: Bi₃₈Mo₇O₇₈
• 分子量: 9860.79
• InChiKey: LSDMIVKYTYASJT-UHFFFAOYSA-N

反应信息

• 作为产物：
  描述：

  bismuth molybdenum oxide 以 neat (no solvent, solid phase) 为溶剂， 生成 bismuth molybdenum oxide
  参考文献：
  名称：

  Bi2n+4MonO6(n+1) with n=3, 4, 5, 6: A new series of low-temperature stable phases in the mBi2O3 – MoO3 system (1.0<m<1.7): Structural relationships and conductor properties

  摘要：

  Four low-temperature phases with compositions Bi10Mo3O24, Bi6Mo2O15, Bi14Mo5O36 and Bi8Mo3O21 have been prepared by the n-butylamine wet synthesis method. They have been characterized by powder X-ray diffraction and transmission electron microscopy, mainly by selected area electron diffraction. The four phases present a close structural relationship and a common basic fluorite-type structure and are members of a homologous series of phases with general formula Bi2n+4MonO6(n + 1), being n = 3, 4, 5 and 6, respectively. The matrices relating their superstructures and the basic fluorite type unit cell are given, as well as a general one for the whole series. The conductor behavior of these phases is characterized by impedance spectroscopy being all these materials very good ionic conductors. (c) 2006 Elsevier Inc. All rights reserved.

  DOI：

  10.1016/j.jssc.2006.10.036
• 作为试剂：
  描述：

  乙烯 在 bismuth molybdenum oxide 作用下， 生成 二氧化碳 、 一氧化碳
  参考文献：
  名称：

  New complex-oxide materials Bi25.6Ba0.4Mo10–2yMe″2yO69–d: Synthesis and characteristics

  摘要：

  An integrated study was carried out of complex-oxide materials based substituted bismuth molybdate Bi26Mo10O69, which exhibit such potentially valuable characteristics as oxygen-ion conductivity at medium temperatures and catalytic activity. Compounds with formula Bi25.6Ba0.4Mo10-2y Me-2y ''O69-d were synthesized by the standard ceramic technology and characterized by the methods of X-ray phase analysis, scanning electron microscopy, and laser light scattering. The morphological characteristics of the ceramic based on Bi25.6Ba0.4Mo10-2y Me-2y'' O69-d were examined; the catalytic characteristics of granulated powders were studied for the example of ethylene oxidation; the method of impedance spectroscopy was employed to examine the temperature dependence of the electrical conductivity of the samples; it was shown that the conductivity of Bi25.6Ba0.4Mo10-2y Me-2y'' O69-d exceeds that of the matrix composition.

  DOI：

  10.1134/s1070427217060040

文献信息

• A Review of Bismuth-Rich Binary Oxides in the Systems Bi2O3–Nb2O5, Bi2O3–Ta2O5, Bi2O3–MoO3, and Bi2O3–WO3
  作者：Christopher D. Ling、Ray L. Withers、Siegbert Schmid、John G. Thompson

  DOI：10.1006/jssc.1997.7677

  日期：1998.4

  Bismuth-rich phases in the Bi2O3–Nb2O5, Bi2O3–Ta2O5, Bi2O3–MoO3and Bi2O3–WO3systems have been investigated using synchrotron X-ray diffraction (XRD) and electron diffraction (ED) to resolve outstanding problems concerning phase relationships, unit cells, and symmetry. A temperature-composition phase diagram for the Bi2O3–Nb2O5system is presented. Single-phase powder specimens have been prepared for

  富铋在Bi相2 ö 3 -Nb 2 ø 5，铋2 ö 3 -Ta 2 ø 5，铋2 ö 3 -MoO 3和Bi 2 ö 3 -WO 3系统已经研究了使用同步辐射X射线衍射（XRD）和电子衍射（ED）解决了有关相位关系，晶胞和对称性的突出问题。对于铋的温度的组合物相图2 ö 3 -Nb 2 ø 5系统介绍。已经为大多数相制备了单相粉末样品。经调制的结构的方法已被应用到相的表征，和空间群或超空间组分配。讨论了每个相的结构的最合适的描述（适当的调制，不适当的调制或上层结构）。
• Bi₂O₃-MoO₃Binary System: An Alternative Ultralow Sintering Temperature Microwave Dielectric
  作者：Di Zhou、Hong Wang、Li-Xia Pang、Clive A. Randall、Xi Yao

  DOI：10.1111/j.1551-2916.2009.03185.x

  日期：2009.10

  Preparation, phase composition, microwave dielectric properties, and chemical compatibility with silver and aluminum electrodes were investigated on a series of single‐phase compounds in the Bi2O3–MoO3 binary system. All materials have ultralow sintering temperatures <820°C. Eight different xBi2O3–(1−x)MoO3 compounds between 0.2≤x≤0.875 were fabricated and the associated microwave dielectric properties were studied. The β‐Bi2Mo2O9 single phase has a positive temperature coefficient of resonant frequency (TCF) about +31 ppm/°C, with a permittivity ɛr=38 and Qf=12 500 GHz at 300 K and at a frequency of 6.3 GHz. The α‐Bi2Mo3O12 and γ‐Bi2MoO6 compounds both have negative temperature coefficient values of TCF∼−215 and ∼−114 ppm/°C, with permittivities of ɛr=19 and 31, Qf=21 800 and 16 700 GHz at 300 K measured at resonant frequencies of 7.6 and 6.4 GHz, respectively. Through sintering the Bi2O3–2.2MoO3 at 620°C for 2 h, a composite dielectric containing both α and β phase can be obtained with a near‐zero temperature coefficient of frequency TCF=−13 ppm/°C and a relative dielectric constant ɛr=35, and a large Qf∼12 000 GHz is also observed. Owing to the frequent difficulty of thermochemical interactions between low sintering temperature materials and the electrode materials during the cofiring, preliminary investigations are made to determine any major interactions with possible candidate electrode metals, Ag and Al. From the above results, the low sintering temperature, good microwave dielectric properties, chemical compatibility with Al metal electrode, nontoxicity and price advantage of the Bi2O3–MoO3 binary system, all indicate the potential for a new material system with ultralow temperature cofiring for multilayer devices application.

  本文研究了一系列Bi2O3–MoO3二元系统中存在的单相化合物的制备、相组成、微波介电性能以及与银和铝电极的化学相容性。所有材料都具有超低烧结温度(<820°C)。在0.2≤x≤0.875范围内制备了8种不同的xBi2O3–(1−x)MoO3化合物，并对其相关的微波介电性能进行了研究。β−Bi2Mo2O9单相材料具有正的温度频率系数(TCF)，约为+31 ppm/°C，其相对介电常数ɛr为38，品质因数Qf为12 500 GHz，测量温度为300 K，频率为6.3 GHz。α−Bi2Mo3O12和γ−Bi2MoO6化合物的TCF值均为负值，分别为约−215和−114 ppm/°C，其相对介电常数ɛr分别为19和31，Qf分别为21 800和16 700 GHz，测量温度为300 K，分别在7.6 GHz和6.4 GHz的频率下测量。通过将Bi2O3–2.2MoO3在620°C下煅烧2小时，可以得到一种包含α相和β相的复合介电材料，其温度频率系数TCF为−13 ppm/°C，相对介电常数ɛr为35，同时还观察到了较大的Qf值(12 000 GHz)。由于低烧结温度材料与电极材料在共烧过程中容易发生热化学反应而导致的困难，对可能的候选电极金属(银和铝)进行了初步研究，以确定是否存在主要的相互作用。根据上述结果，Bi2O3–MoO3二元系统具有超低烧结温度、良好的微波介电性能、与铝金属电极的化学相容性、无毒性和价格优势，这些特点均表明该体系有望应用于具有超低温度共烧特性的多层设备。
• Characterization of a new bismuth molybdate phase — Bi38Mo7O78
  作者：D.J. Buttrey、D.A. Jefferson、J.M. Thomas

  DOI：10.1016/0025-5408(86)90154-6

  日期：1986.6

  Investigation of a variety of bismuth molybdate preparations with BiMo ≥ 5 by x-ray microanalysis and electron and x-ray powder diffraction has revealed the existence of a new phase with composition Bi38Mo7O78, which belongs to the orthorhombic system (Pccn) with a = 16.818, b = 28.658, c = 16.903A, and Z = 4. The structure appears to be based on defect fluorite with 48 oxygen vacancies in the unit

  通过 x 射线微量分析和电子和 x 射线粉末衍射对 BiMo ≥ 5 的各种钼酸铋制剂的研究表明存在一个新相，其组成为 Bi38Mo7O78，属于正交晶系 (Pccn)，a = 16.818 , b = 28.658, c = 16.903A, 和 Z = 4。该结构似乎是基于晶胞中有 48 个氧空位的缺陷萤石。具有较大 Bi/Mo 比率的制备导致具有无序超晶格的萤石状结构。
• Structure and crystal chemistry of fluorite-related Bi38Mo7O78 from single crystal X-ray diffraction and ab initio calculations
  作者：Neeraj Sharma、René B. Macquart、Mogens Christensen、Maxim Avdeev、Yu-Sheng Chen、Chris D. Ling

  DOI：10.1016/j.jssc.2009.02.030

  日期：2009.6

  The floating-zone furnace method was used to synthesize single crystals of the fluorite-related δ-Bi2O3-type phase Bi38Mo7O78 for the first time. Single crystal synchrotron X-ray diffraction data, in conjunction with ab initio (density functional theory) calculations, were used to solve, optimize, and refine the 5×3×3 commensurate superstructure of fluorite-type δ-Bi2O3 in Pbcn (a=28.7058(11) Å, b=16

  首次采用浮区炉法合成了萤石相关的δ - Bi 2 O 3型相Bi 38 Mo 7 O 78的单晶。单晶同步辐射X射线衍射数据，会同从头（密度泛函理论）的计算，被用来解决，优化和改进萤石型的5×3×3相称上层建筑δ -Bi 2 ö 3在Pbcn（a = 28.7058（11）Å，b = 16.8493（7）Å和c = 16.9376（6）Å，Z = 4，R F= 11.26％，w R I = 21.67％）。该结构在b面的四面体环境中包含Mo 6+的阶梯状通道，在ac面中的八面体环境中包含Mo 6+的链状结构。讨论了阶梯形通道在氧化物离子传导中的作用。Mo 6+的四面体和八面体配位环境同时存在，这是以前在Mo 6+掺杂的δ- Bi 2 O 3型相中未观察到的，除了晶体学和ab的结果外，还有电荷平衡的考虑。从头开始分析。
• Bi26Mo10OδSolid Solution Type in the Bi2O3–MoO3–V2O5Ternary Diagram
  作者：R.N. Vannier、G. Mairesse、F. Abraham、G. Nowogrocki

  DOI：10.1006/jssc.1996.0133

  日期：1996.3

  of [Bi12O14]∞columns along the twofold axis, connected with MoO4or (Mo, V)O4tetrahedra and isolated bismuth atoms in a quasi-planar O environment. A solid solution domain belonging to this structural type within the Bi2O3–MoO3–V2O5ternary diagram has been evidenced. It extends from Bi25.75Mo10Oδto Bi27.75Mo10Oδon the Bi2O3–MoO3line. This work was completed by a preliminary study of conduction properties

  Bi 26 Mo 10 O 69和Bi 26 Mo 6 V 4 O 67在单斜晶系统中结晶，空间群P 2 / c为a = 11.742（8）Å，b = 5.800（7）Å，c = 24.77（5） Å，β= 102.94（6）°，Z = 1且a = 11.633（7）Å，b = 5.795（3）Å，c = 24.39（2）Å，β= 101.35（5）°，Z = 1，分别。通过分别在Philips PW1100自动衍射仪（Mo Kα辐射）。最终的R索引是0.048和0.041。普通结构由沿双向轴的[Bi 12 O 14 ] ∞列组成，在准平面O环境中与MoO 4或（Mo，V）O 4四面体和孤立的铋原子相连。在Bi 2 O 3 -MoO 3 -V 2 O 5三元图中，属于这种结构类型的固溶域已经得到证明。从毕扩展25.75莫10 Ø δ痹27.75莫10 Ø δ上碧2 O 3 –MoO 3线。