Abstract:
A thermally shock resistant ceramic body, such as a porous ceramic honeycomb structure for a wall flow diesel engine exhaust filter or a flow-through ceramic catalyst support, is formed of a composite ceramic material comprising a major first ceramic phase exhibiting good thermal shock resistance and a minor second phase material that substantially reduces the elastic modulus of the composite ceramic material at elevated temperatures.
Abstract:
A method of preparing beta-spodumene bodies from a plastic batch comprised entirely of minerals, absent a glass component. The resulting structure has a stoichiometry of 1:1:4 (LiO2:Al2O3:SiO2) to 1:1:11 (LiO2:Al2O3:SiO2), and exhibits a low coefficient of thermal expansion, high porosity and high strength, and is suitable for automotive catalytic converter substrates requiring a fast light-off time. There is also provided a ceramic article having a solid-solution of beta-spodumene ranging in molar ratio from 1:1:4 LiO2-Al2O3-SiO2 to 1:1:11 LiO2-Al2O3-SiO2 wherein a component selected from the group consisting of magnesium oxide (MgO), manganese oxide (MnO), and cobalt oxide (CoO) is substituted for lithium oxide (LiO2) at 10 to 65 mole %, and optionally a minor phase of mullite (3Al2O3-2SiO2) in an amount of up to 50% by weight.
Abstract translation:从不含玻璃成分的完全由矿物构成的塑料批料制备β-锂辉石体的方法。 得到的结构具有1:1:4(LiO 2 :Al 2 O 3 :SiO 2)至1:1:11(LiO 2 :Al 2 O 3 :SiO 2)的化学计量比,并且表现出低的热膨胀系数,高孔隙率和高强度,并且 适用于需要快速熄灯时间的汽车催化转化器基板。 还提供了一种陶瓷制品,其具有以1:1:4的LiO 2 -Al 2 O 3 -SiO 2与1:1:11的LiO 2 -Al 2 O 3 -SiO 2的摩尔比范围的β-锂辉石的固溶体,其中选自 的氧化镁(MgO),氧化锰(MnO)和氧化钴(CoO)代替10〜65摩尔%的氧化锂(LiO 2),以及任选的少许相的莫来石(3Al2O3-2SiO2) 高达50%重量。
Abstract:
A substrate for flat panel display glasses comprising a glass the P 2 O 5 -SiO 2 -Al 2 O 3 ternary system which yields stable glasses exhibiting high strain point temperatures, resistance to devitrification, good chemical durability, excellent dielectric properties, coefficients of thermal expansion that can be tailored to match that of silicon, and having liquidus viscosities that enable forming by conventional methods. The glass comprises the following composition as calculated in weight percent on an oxide basis: P 2 O 5 33-75%, SiO 2 2-52%, Al 2 O 3 8-35%.
Abstract:
A formation of internally nucleated glass ceramics articles that can be heated in the 1350-1450°C range for extended periods of time without significant deformation or change in shape is disclosed. The predominant crystal phase of these glass ceramics is celsian (BaAl 2 Si 2 O 8 ) or its strontium equivalent (SrAl 2 Si 2 O 8 ), or solid solutions or mixtures of these compositions, all belonging to the feldspar mineral group.
Abstract translation:公开了可在1350-1450℃范围内长时间加热而形成内部有核的玻璃陶瓷制品,而不会发生明显的变形或变形。 这些玻璃陶瓷的主要结晶相是贝氏体(BaAl 2 Si 2 O 8)或其等价锶(SrAl 2 Si 2 O 8),或这些组合物的固体溶液或混合物,均属于长石矿物组。
Abstract:
Optical waveguides are fabricated in glass-ceramic materials utilizing an ion-exchange process to pattern the waveguide at a temperature below the ceramming temperature of the glass-ceramic material. The optical waveguides may include optically-active dopants dispersed preferably within the crystallite phase of the glass-ceramic material.
Abstract:
A nucleant seed for epitaxial growth of single-crystal CaF 2 includes SrF 2 . In some embodiments, YF 3 , LaF 3 , or rare-earth fluoride is substituted into the SrF 2 structure.
Abstract:
A broadband source, including associated devices that may incorporate the broadband source, which makes use of at least one, preferably two or more broad fluorescence spectra in combination from one or more species of transition metal ions doped in one or more material bodies. The bodies are selected from crystalline, glass-ceramic, glass, or polymer-organic materials. The broadband source or devices can generate a very broad fluorescence spectrum. The combined spectrum preferably spans a wavelength range of about 500 nm to 600 nm to 700 nm, and having an intensity that does not deviate from an average intensity by more than about 10 dB, over a range or portion of the near infrared region.
Abstract:
A waveguide structure (2) includes a glass body (12) and a waveguide pattern (10) formed in the glass body by irradiating a predetermined track on the glass body with sufficient energy to grow a crystalline phase along the predetermined track.