Abstract:
The present invention provides a complex oxide sintered body 10 wherein Zr/(In+Zr+Y) is 0.05 to 4.5 at % and Y/(In+Zr+Y) is 0.005 to 0.5 at % in an atomic ratio when indium, zirconium, and yttrium are designated by In, Zr, and Y, respectively. Moreover, the present invention provides a sputtering target including the complex oxide sintered body 10 and a transparent conductive oxide film obtained by sputtering the sputtering target.
Abstract:
Methods are described to make strong, tough, and/or lightweight glass-ceramic composites having a crystalline phase and an amorphous phase generated by viscous reaction sintering of a complex mixture of oxides and other materials. The present invention further relates to strong, tough, and lightweight glass-ceramic composites that can be used as proppants and for other uses.
Abstract:
A composition having nanoparticles of a refractory-metal carbide or refractory-metal nitride and a carbonaceous matrix. The composition is not in the form of a powder. A composition comprising a metal component and an organic component. The metal component is nanoparticles or particles of a refractory metal or a refractory-metal compound capable of decomposing into refractory metal nanoparticles. The organic component is an organic compound having a char yield of at least 60% by weight or a thermoset made from the organic compound. A method of combining particles of a refractory metal or a refractory-metal compound capable of reacting or decomposing into refractory-metal nanoparticles with an organic compound having a char yield of at least 60% by weight to form a precursor mixture.
Abstract:
A mullite sintered body according to the present invention has an impurity element content of 1% by mass or less and contains sintered mullite grains having an average grain size of 8 μm or less. When a surface of the mullite sintered body is finished by polishing, pores in the surface have an average largest pore length of 0.4 μm or less. The surface preferably has a center line average surface roughness (Ra) of 3 nm or less. The surface preferably has a maximum peak height (Rp) of 30 nm or less. The number of pores in the surface is preferably 10 or less per unit area of 4 μm×4 μm.
Abstract:
A crystal-oriented piezoelectric ceramic including a major constituent represented by general formula (1-s)A1B1O3-sBaMO3 (where A1 is at least one element selected from alkali metals, B1 is at least one of transition metal elements and includes Nb, M is at least one of Group IVA elements and includes Zr, and 0.05
Abstract:
The present invention aims to provide a honeycomb catalyst that includes titanium oxide, vanadium oxide, and tungsten oxide, and exhibits sufficient NOx conversion ability although it contains a small amount of vanadium oxide. The honeycomb catalyst of the present invention contains: titanium oxide; vanadium oxide; and tungsten oxide, the honeycomb catalyst containing the vanadium oxide in an amount of 0.3 to 5.0 wt %, a peak attributable to a vanadium atom being spaced by an interatomic distance of 2.4 to 2.5 Å from a tungsten atom in a radial distribution function, the intensity of the peak being 0.05 Å or more in the radial distribution function per 1 wt % of the amount of the vanadium oxide in the honeycomb catalyst, the radial distribution function being obtained by Fourier transformation of an extended X-ray absorption fine structure (EXAFS) spectrum in a K-absorption edge of the tungsten in the honeycomb catalyst.
Abstract:
A ceramic block consisting essentially of substantially homogeneous (Y2O3)x.P2O5, where 0.95≦x≦1.05, having length LL, a width WW and a height HH, and a volume VV of at least 8×10−3 m3 essentially free of cracks throughout the volume, a density of at least 85% of the theoretical maximal density of Y2O3.P2O5 under standard conditions, and a creep rate at 1250° C. and 6.89 MPa of CR, where CR≦8.0×10−6 hour−1, and method for making the same. The method utilizes a dry process where the starting YPO4-based ceramic material is synthesized by reacting anhydrous P2O5 with dry Y2O3 powder.
Abstract translation:基本上由基本上均匀的(Y 2 O 3)x.P 2 O 5组成的陶瓷块,其中具有长度LL,宽度WW和高度HH以及至少8×10-3立方米的体积VV基本上不变的0.95≦̸ x& 的裂纹,在标准条件下密度为理论上最大密度为Y2O3.P2O5的85%,CR为1250℃和6.89MPa时的蠕变速率,其中CR&NlE; 8.0×10-6小时 -1,以及制作相同的方法。 该方法采用干法,其中起始的YPO 4基陶瓷材料是通过无水P 2 O 5与干燥的Y 2 O 3粉末反应来合成的。
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:
The subject invention discloses a method for the preparation of a dual structure cellular ceramic object where a dispersion of a ceramic precursor a chain-growth or step-growth polymer precursor and a solvent is heated to a first temperature at a first rate followed by heating to a second temperature at a second rate and holding the temperature to form a sintered dual structure cellular ceramic object which is then cooled at a third rate to room temperature. The dual structure cellular ceramic object has a dense surface layer over at least a portion of the object that abruptly yet smoothly and continuously transitioning into a porous ceramic.
Abstract:
The present embodiments disclosed herein are related to methods of preparing a macroporous ceramic body. According to some embodiments, a first mixture of ceramic-forming components is combined with a polymer network structure to form a second intermediate mixture comprising a polymer network. The polymer network is then removed in the drying and/or sintering step leaving an interconnected open pore network within the ceramic body. In some embodiments, the macroporous ceramic body comprises a three-dimensional, porous network comprising pores of about 3 mm to 11 mm.