Abstract:
An object of the present invention is to provide a ferrite magnetic material which can provide a permanent magnet retaining high Br and HcJ as well as having high Hk/HcJ. The ferrite magnetic material according to a preferred embodiment is a ferrite magnetic material formed of hard ferrite, wherein a P content in terms of P2O5 is 0.001% by mass or more.
Abstract translation:本发明的目的是提供一种能够提供保持高Br和HcJ的永磁体以及具有高Hk / HcJ的铁氧体磁性材料。 根据优选实施方案的铁氧体磁性材料是由硬质铁氧体形成的铁氧体磁性材料,其中以P 2 O 5计的P含量为0.001质量%以上。
Abstract:
Ceramic matrix composites include a fiber network and a matrix including layers of first and second materials. The first material may include SiC. The second material may include an element that when oxidized forms a silicate that is stable at high temperatures.
Abstract:
In one embodiment a tin oxide based electrode is disclosed. The tin oxide-based electrode includes a base material of tin oxide, a resistivity modifier, a sintering aid, and a corrosion inhibitor. The corrosion inhibitor forms a solid solution with the base material and has a melting point not less than about 1700° C. and a partial pressure of not greater than about 1.0E-7 atmospheres at 1500° C. The corrosion inhibitor further includes 0-4.0 wt % ZrO2 based on the total weight of the composition.
Abstract:
A class of ceramic compositions according to the formula Pb(1-z)Mz(Mn1/3Sb2/3)x(ZryTi1-y)1-xO3 where M is selected to be either Sr or Ba, x is selected to be between 0.01 and 0.1, y is selected to be between 0.35 and 0.55, and z is selected to be between 0.01 and 0.10. In some embodiments of the above composition, one or more dopants is added to the compositions. The dopant(s) may be selected from the group comprising: PbO, CeO2, SnO2, Sm2O3, TeO2, MoO3, Nb2O5, SiO2, CuO, CdO, HfO2, Pr2O3, and mixtures thereof. The dopants can be added to the ceramic composition in individual amounts ranging from 0.01 wt % to up to 5.0 wt %. The preferred ceramic compositions exhibit one or more of the following electromechanical properties: a relative dielectric constant (∈) of between 1200 and 2000, a mechanical quality factor (Qm) of between 1500 and 2800; a piezoelectric strain constant (d33) of between 250-450 pC/N, a dielectric loss factor (tan δ) of between 0.002-0.008 and a thickness electromechanical coupling coefficient (kt) of between 0.45 and 0.7.
Abstract translation:一类根据式Pb(1-z)Mz(Mn1 / 3Sb2 / 3)x(ZryTi1-y)1-xO3的陶瓷组合物,其中M选择为Sr或Ba,x选择为0.01 和0.1,y选择在0.35和0.55之间,z选择在0.01和0.10之间。 在上述组合物的一些实施方案中,将一种或多种掺杂剂加入到组合物中。 掺杂剂可以选自PbO,CeO 2,SnO 2,Sm 2 O 3,TeO 2,MoO 3,Nb 2 O 5,SiO 2,CuO,CdO,HfO 2,Pr 2 O 3及其混合物。 掺杂剂可以以0.01重量%至高达5.0重量%的单独量加入陶瓷组合物中。 优选的陶瓷组合物表现出以下机电性质中的一种或多种:介于1200和2000之间的相对介电常数(ε),1500至2800之间的机械品质因数(Qm); 压电应变常数(d33)在250-450pC / N之间,介电损耗因子(tanδ)在0.002-0.008之间和厚度机电耦合系数(kt)在0.45和0.7之间。
Abstract:
An object of the present invention is to provide a ferrite magnetic material capable of providing a permanent magnet in which high Br and HcJ are kept, and which has a high Hk/HcJ. A ferrite magnetic material in accordance with a preferred embodiment has a ferrite phase having a hexagonal structure and has a main composition represented by Ca1-w-x-yRwSrxBayFezMmO19(R is at least one element of rare earth elements (including Y) essentially including La, and Bi, and M is at least one element of Co, Mn, Mg, Ni, Cu, and Zn essentially including Co), where 0.25
Abstract:
The present invention relates to dielectric ceramics, thin and/or thick layers produced therefrom and a method for the production thereof and the use of the dielectrics and of the thin and/or thick layers.
Abstract:
In the conventional alumina sintered bodies, a sintered body having high flexural strength, high toughness and high translucency in combination is not obtained, and a translucent alumina sintered body suitable for a dental material requiring both strength and sensuousness was not obtained. A translucent alumina sintered body having fracture toughness of 4.5 MPa·m0.5 or more, flexural strength of 350 MPa or more, and all light transmittance (sample thickness: 1 mm) to a visible light having a wavelength of 600 nm, of 60% or more is provided. The sintered body wherein sintered crystal grains are slender plate-like and/or columnar shape having an average aspect ratio of 1.5 or more and an average long axis length of 15 μm or less is preferred.
Abstract:
Disclosed is a method of coating a particle, the method comprising contacting (i) a particle, wherein the surface of the particle comprises functional groups suitable to undergo a coupling reaction with at least a hydroxyl group, a halogen group or an alkoxy group, with (ii) molecules of formula (Ia) and/or (Ib): (Ia) or (Ib) wherein A is a metal or a metalloid, R1 and (in formula (Ia)) R2 are halogen or an alkoxy group and R20 is OH, halogen or an alkoxy group. G1 is an aliphatic; cycloaliphatic, aromatic, arylaliphatic or arylcycloaliphatic spacer and E is a functional group. Molecules of the compound of general formula (Ia) and/or (Ib) are immobilized on the surface of the particle by a coupling reaction between functional groups on the surface of the particle and moieties R20.
Abstract:
Particles, including proppants, comprising a fluorinated siloxane. The particles are useful as proppants in fractured a subterranean geological formation comprising hydrocarbons.