摘要:
A boron nitride fiber comprising hexagonal and/or turbostratic boron nitride and having a C plane oriented in parallel with the fiber axis and a degree of crystal orientation of 0.74 or above. It is produced by preparing a boron nitride precursor by heating an adduct formed between a boron trihalide, such as boron trichloride, and a nitrile compound, such as acetonitrile or benzonitrile, and an ammonium halide or a primary amine hydrohalide in the presence of a boron trihalide at around 125 DEG C, dissolving the obtained precursor in a solvent which can dissolve the same, spinning a boron nitride precursor fiber from the obtained solution, heat treating the spun precursor fiber in an inert gas atmosphere and then in an ammonia gas atmosphere to prepare a boron nitride fiber, and heat treating the obtained fiber while applying a tensile stress to the fiber. The obtained fiber, having a degree of crystal orientation of 0.74 or above, exhibits a high tensile strength.
摘要:
The current disclosure relates to highly homogeneous glass sputter targets with a large aspect ratio and a high relative density. The glass sputter targets have properties that are desirable for forming thin films by physical vapor deposition processes such as sputtering. Methods for producing chalcogenide glass sputter targets are included.
摘要:
A flexible article made of glass and metal foil and the production thereof. The flexible article is a multilayered structure having at least one glass layer and one metal foil layer, and the shear strength between glass and metal foil is above 1 MPa/mm 2 . The glass layer of said flexible article has high electrical resistivity at ambient temperature, low roughness, low thickness, good adherence to metal foil, and the glass in the glass layer has high temperature stability and low flowing temperature, and the thermal expansion coefficient (20 to 300 °C) is 1 x l0 -6 /K to 25 x10 -6 /K. The whole article is flexible and can be bent, and the curvature radius of the bent flexible article is above 1 mm. The glass used is produced by high temperature melting and cooling.