62 results about "Anisotropic crystal" patented technology

A ceramic thermal barrier coating (TBC) (18) having first and second layers (20, 22), the second layer (22) having a lower thermal conductivity than the first layer for a given density. The second layer may be formed of a material with anisotropic crystal lattice structure. Voids (24) in at least the first layer (20) make the first layer less dense than the second layer. Grooves (28) are formed in the TBC (18) for thermal strain relief. The grooves may align with fluid streamlines over the TBC. Multiple layers (84, 86,88) may have respective sets of grooves (90), Preferred failure planes parallel to the coating surface (30) may be formed at different depths (A1, A2, A3) in the thickness of the TBC to stimulate generation of a fresh surface when a portion of the coating fails by spalling. A dense top layer (92) may provide environmental and erosion resistance.

An ion-conducting composite electrolyte is provided comprising path-engineered ion-conducting ceramic electrolyte particles and a solid polymeric matrix. The path-engineered particles are characterized by an anisotropic crystalline structure and the ionic conductivity of the crystalline structure in a preferred conductivity direction H associated with one of the crystal planes of the path-engineered particle is larger than the ionic conductivity of the crystalline structure in a reduced conductivity direction L associated with another of the crystal planes of the path-engineered particle. The path-engineered particles are sized and positioned in the polymeric matrix such that a majority of the path-engineered particles breach both of the opposite major faces of the matrix body and are oriented in the polymeric matrix such that the preferred conductivity direction H is more closely aligned with a minimum path length spanning a thickness of the matrix body than is the reduced conductivity direction L.

In the case where an ultraminiature piezoelectric substrate, which has a resonating portion formed by making a concavity by etching in the surface of the piezoelectric substrate made of an anisotropic crystal material, is mass-produced by batch operation using a large-area piezoelectric substrate wafer, an annular portion surrounding each concavity is formed sufficiently thick to prevent cracking from occurring when the wafer is severed. A piezoelectric substrate 2 of an anisotropic piezoelectric crystal material has a thin resonating portion 4 and a thick annular portion 5 integrally surrounding the outer marginal edge of the resonating portion to form a concavity 3 in at least one of major surfaces of the substrate; the inner wall 5a of the annular portion in the one crystal orientation slopes gently more than the inner wall in the other crystal orientation perpendicular to said one crystal orientation, and the piezoelectric substrate is longer in said one crystal orientation than in the other crystal orientation.

Anisotropic crystals such as Nd:YVO₄, Nd:YLF, and Nd:GdVO₄ have become preferred gain materials for many laser applications. The anisotropic gain medium without ancillary compensation ensures there is no degradation of laser modes when passing through the gain medium. An optical power amplifier that incorporates an anisotropic gain medium achieves power scaling with multiple passes while also maintaining good mode matching between the laser and the pump during each pass. Preferred embodiments implement for multiple passes of a seed laser beam through an anisotropic gain medium with substantially zero angular beam displacement during each pass. The multi-pass system provides an economical, reliable method of achieving high TEM₀₀ power to meet the demands of micromachining, via drilling, and harmonic conversion applications.

The invention discloses a method for preparing texturing boride super-high-temperature ceramic. The method for preparing the texturing boride super-high-temperature ceramic comprises the steps that IVB group metal simple substance, amorphous boron powder, silica powder, and transition metal are adopted as raw materials, and complex-phase powder containing boride seed crystal and silicide particles is prepared; and slurry is prepared by mixing the complex-phase powder and boride ceramic powder, a ceramic body is prepared by means of the casting process technology or high-intensity magnetic field orientation process technology, and then hot pressed sintering is carried out on the ceramic body. According to the method for preparing the texturing boride super-high-temperature ceramic, the boride seed crystal is enabled to grow in the ceramic body in a orientation-arrangement mode due to the preparation of boride seed crystal with anisotropic microstructure and the adoption of the casting process technology or high-intensity magnetic field orientation process technology for preparation of the ceramic body, and then the texturing boride super-high-temperature ceramic with anisotropic crystal particle morphology is prepared. According to the ceramic prepared with the method, relative density is more than 98%, material Lotgering orientation factor f (001) can reach to 0.95, and obvious anisotropism can be represented by each performance.

A method of forming an anisotropic crystal film, comprising providing a donor which comprises a base and an anisotropic crystal film bounded to the base, and a receptor. At least a portion of the anisotropic crystal film is placed in contact with the receptor. A loading is applied to at least a portion of the base, whereby providing shear and compressive stresses onto the donor and receptor, and transferring at least a portion of the anisotropic crystal film onto the receptor and delaminating the at least portion of the anisotropic crystal film from the base.

A multilayer plate is provided comprising an optically transparent substrate, a protective layer, a conducting layer, and at least one anisotropic thin crystal film. The anisotropic thin crystal film is made of a substance containing aromatic rings and possessing a structure with an interplanar spacing of 3.4±0.2 Å along one of optical axes. The thin crystal film is situated between the substrate and the conducting layer and is separated from the conducting layer by the protective layer. The transmission of the multilayer plate for UV radiation does not exceed 1% at any wavelength below 380 nm.

Disclosed herein are a printed circuit board having a copper plated layer with an anchor shaped surface and roughness by forming the copper plated layer having an anisotropic crystalline orientation structure using a plating inhibitor at the time of forming the copper plated layer serving as a circuit wiring and using composite gas plasma and a dilute acid solution, and a method of manufacturing the same.

A method of horizontal ribbon growth from a melt includes forming a leading edge of the ribbon using radiative cooling on a surface of the melt, drawing the ribbon in a first direction along the surface of the melt, and removing heat radiated from the melt in a region adjacent the leading edge of the ribbon at a heat removal rate that is greater than a heat flow through the melt into the ribbon.

The invention pertains to the field of fabrication of devices of various purposes, which use anisotropic films: polarizers, retarders, etc., as well as technology of obtaining coatings with anisotropy of electric conductivity, magnetic properties, thermal conduction and other physical properties.

The invention includes the method of forming anisotropic crystal film on a receptor plate via transferring it from the donor plate

Implementing the disclosed invention preserves the high degree of anisotropy and optical parameters of crystal films after the transfer. Additionally, it is possible to form anisotropic coatings on the surface of any configuration (including curved) and different degree of roughness; also, it is possible to transfer films of various sizes and configurations as well as multilayer coatings containing anisotropic film and form color images.

The invention discloses a microcrystalline glass binder, a preparation method of the microcrystalline glass binder, a superhard material grinding tool and a preparation method of the superhard material grinding tool, and belongs to the technical field of superhard material tools. The microcrystalline glass binder is prepared from, by mass, 55-65% of SiO2, 5-15% of CaO, 1-10% of K2O, 5-15% of Na2O and 5-20% of CaF2. The superhard material grinding tool is prepared through the microcrystalline glass binder, and lath-shaped anisotropic crystals exist in the microcrystalline phase of the superhard material grinding tool and are distributed in a cross mode. According to the preparation method of the superhard material grinding tool, the crystallization temperature in the sintering process is controlled, so that lath-shaped anisotropic crystals exist in the microcrystalline phase of the superhard material grinding tool and are distributed in the cross mode, and the preparation method is easy, convenient and applicable to industrial production.

Far-field sub-diffraction optical lenses “FaSDOLs” comprise an anisotropic crystal having special dispersion characteristics such that it supports diffraction free propagation. An image with subwavelength features on the input surface is transferred through a propagation function to the output surface with effectively no, or minimal, loss in information. These special properties may be exploited in several ways, including but not limited to, magnification of an image at the input surface through the use an oblique cut at the output surface, magnification of an image at the input surface through use of a curved crystalline structure, and more generally near-field optical processing.

The invention discloses a method and a device for controlling crystal orientation in a steady-state magnetic field through directional solidification. Metal containing anisotropic crystals and alloys are put in a directional solidification device in the steady-state magnetic field; for a certain crystal with a difference in easy growth direction and easy magnetization direction, the steady-state magnetic field and direction solidification are adopted, so that textures can be formed in the easy growth direction and easy magnetization direction respectively, that is, when the easy growth direction of the crystal is orientated in the direction opposite to heat flux in the directional solidification process, the steady-state magnetic field is applied at a certain angle in the directional solidification process according to characteristics of crystallography, accordingly, the easy magnetization direction can turn to a magnetic field direction, and the purpose that multiple crystals form multi-crystal-orientation textures is achieved. The method is simple and convenient to operate.

The invention relates to a laser (1) for emitting laser light in the visible spectral range. A rare earth doped anisotropic crystal (2) comprising a 5d-4f transition is arranged within a laser resonator (7, 8), and a pumping light source (3) pumps the crystal (2) for generating laser light in the visible spectral range by using the 5d-4f transition. The 5d-4f transition of the rare earth doped anisotropic crystal comprises an absorption band extending over several nm. Thus, pump light having a wavelength within a relatively broad wavelength range can be used. This reduces the requirements with respect to the wavelength accuracy of the pumping light source and, thus, more pumping light sources of an amount of produced pumping light sources can be used for assembling the laser, thereby reducing the amount of rejects.

A quarter wavelength plate for reducing the dependence of a retardation value on an incident beam angle in optically anisotropic crystals. The quarter wavelength plate is formed of optically anisotropic crystals in a thickness of 0.1 mm to 0.5 mm. The quarter wavelength plate can contribute to a reduction in the dependence of the retardation value on the angle at which a light beam impinges on the quarter wavelength plate, and to a reduction in color shading caused by a rise in temperature. A reflection type liquid crystal display device which employs the quarter wavelength plate can enhance the luminance and contrast.

The invention provides a method and equipment for orientating a crystal axis of an in-plane anisotropic crystal. The method comprises the following steps: A, setting a reference azimuth line on a to be tested surface of a to be tested crystal; B, irradiating the to be tested surface of the to be tested crystal by utilizing polarized light and receiving reflected light; C, changing a polarization angle of the polarized light, and calculating the intensity of reflection differential signals at different polarization angles by utilizing the intensity of the reflected light at the different polarization angles; D, fitting the intensity of the reflection differential signals at the different polarization angles by utilizing a curve; and E, obtaining an included angle between a crystal axis direction and the reference azimuth line according to a fitted curve. The method and the equipment for orientating the crystal axis of the in-plane anisotropic crystal, which are provided by the invention, apply an optical reflection differential technology to determine the direction of the crystal axis, so that the technical problems of complex test flow, low precision and strict use conditions of acrystal axis orientating method in the prior art can be effectively solved.