32results about How to "Good dimensional stability at high temperature" patented technology

The invention relates to a method for preparing a work hardening insulation quilt for a high temperature furnace, which comprises the following steps of: 1, cutting, pre-impregnating and airing a soft quilt; 2, adhering the soft quilt by using an adhesive; 3, pressing and curing for forming; 4, performing carbonization treatment; 5, performing high temperature treatment; 6, machining; 7, performing coating treatment; and 8, performing chemical vapor deposition treatment and high temperature treatment, or directly performing high temperature treatment to obtain the work hardening insulation quilt for the high temperature furnace. The method has the advantages of simple technological process and suitability for mass production; and the prepared work hardening insulation quilt has the heat conductivity of less than or equal to 0.5W / m.K, the ash content of less than or equal to 2,000ppm, high mechanical properties and high-temperature dimensional stability and excellent processability, does not generate volatile matters when used in the high temperature furnace, cannot pollute the product, and has important significance for prolonging the service life of the insulation quilt in the high temperature furnace.

The invention discloses a polyimide-zirconium dioxide composite nanofiber membrane and a preparation method thereof. The preparation method comprises the steps that a polyamide acid nanofiber membrane is prepared through electrostatic spinning, then the polyamide acid nanofiber membrane is put into zirconium dioxide sol to enable the nanofiber surfaces to be uniformly coated with the zirconium dioxide sol, gradient temperature increasing thermal imidization processing is conducted, and then the polyimide nanofiber membrane of which the surface is coated with a nano-zirconium dioxide layer is prepared. The polyimide-zirconium dioxide composite nanofiber membrane prepared through the method is composed of the zirconium dioxide nanometer layers coating the surfaces of the polyimide nanofibers, the thickness of the zirconium dioxide layer is 10-100 nm, and the diameter of the polyimide fibers is 30-600 nm. Accordingly, through coating of the zirconium dioxide nanometer layers, the surface wettability, the size stability, the mechanical property and the temperature resistance of the polyimide fiber membrane are improved; in addition, the implementing process is easy, processing is easy to achieve, and the application prospect is good.

The invention relates to a method for preparing a wound heat-insulating drum. The method comprises the following steps of: 1, cutting a soft felt, pre-dipping and performing air drying; 2, gumming carbon cloth; 3, brushing an adhesive on the soft felt and the carbon cloth; 4, winding; 5, curing; 6, repairing an end face; 7, sealing holes of a coating; 8, performing carbonization treatment; and 9,performing high-temperature treatment and cooling along with a furnace to obtain the wound heat-insulating drum. The method has the advantages of simple process and batch production; and the preparedwound heat-insulating drum has the advantages of difficult layering, good mechanical property, superior high-temperature dimensional stability, low thermal conductivity and low ash content. The method reduces the replacement frequency of the heat-insulating drum and has great significance in prolonging the service life of the heat-insulating drum in high-temperature furnace equipment.