3results about How to "Improve melting properties" patented technology

A method for preparing a high-temperature ablation-resistant chopped carbon fiber reinforced SiBCN‑MAS composite material, which relates to a method for preparing a SiBCN ceramic-based composite material. The present invention aims to solve the problem that the existing carbon fiber or cracked carbon coated carbon fiber reinforced SiBCN ceramic-based composite materials have poor contact surface bonding and limited improvement in high-temperature ablation resistance. Method: 1. Prepare cracked carbon coated chopped carbon fibers; 2. Prepare SiBCN amorphous ceramic powder; 3. Mix raw materials; 4. Sinter. The present invention is used for the preparation of high-temperature ablation-resistant chopped carbon fiber reinforced SiBCN‑MAS composite materials.

The invention relates to a preparation method of high-quality foam glass, in particular to a method for preparing foam glass with good heat insulation performance and strong sound absorption performance by using glass powder as a main raw material and diatomite as an auxiliary material. The preparation method comprises the following steps: (1) pretreatment: crushing formula glass, feeding the crushed formula glass into a ball mill, grinding to obtain glass powder, and sieving the obtained glass powder, diatomite, a foaming agent and the like; (2) uniformly mixing the pretreated glass powder, diatomite, a foaming agent and a foam stabilizer according to a specific mass ratio to prepare a raw material; (3) loading the obtained raw material into a specific high-temperature-resistant mold, and feeding the mold into a kiln for firing and foaming; (4) quenching the foamed sample, and demolding; and (5) annealing the demolded sample, and trimming to obtain a finished product. The foam glass obtained in the invention has high cost performance, high noise reduction coefficient and low thermal conductivity, is an ideal sound absorption material, thermal insulation material and fireproof material, and has a very wide application prospect in the engineering construction industry.

This invention relates to a conductive silver paste-specific glass powder for automotive rear window defroster lines, its preparation method, and its application. The glass powder comprises the following components in the indicated mass ratios: Bi₂O₃: 45-65%, SiO₂: 15-30%, B₂O₃: 5-12%, Al₂O₃: 1-5%, K₂O: 2-8%, Li₂O: 1-5%, CaO: 0.5-3%, and Sb₂O₃: 0.5-3%. It is processed according to the following steps: raw material selection, pretreatment, precise mixing, high-temperature melting, rapid water quenching, fine processing, and grading. Compared with existing technologies, this invention has advantages such as adaptability to high-temperature short-time sintering, high acid resistance, low sheet resistance, high welding strength, and high adhesion.