The production process of alumina ceramics скачать в хорошем качестве

The production process of alumina ceramics

【01】It’s an distinctive Alumina Ceramic，They are everywhere in our life. Alumina is formed in two ways: One is injection molding, and the other is dry powder pressing. Powder dry pressing: Very easy. We use alumina granulated powder through a 40-ton servo press. With a clang, we can shape it into the form we want. 【02】But, this way is only suitable for simple-shaped structural parts. If it is a complex structure like this, It requires a very fashionable molding process: injection molding. After heating the white powder of alumina and paraffin and fully stirring and mixing, using the fluidity and thermoplasticity of paraffin to achieve injection molding. Due to the entire heating and stirring process taking twenty hours, in order to increase production efficiency, workers will make the mixture into a semi-finished product like gypsum boards. When the customer wants to place an order, these gypsum boards are heated, melted, and mixed with a few micro-components. Just stir it for two hours, and it can be directly sent for molding. 【03】After the slurry is sent to the abrasive tool through the pipe, combined grinding pressure shapes it into a variety of complex shapes, including this porous heat-conducting plate. It’s pretty incredible. Injection-molded embryo material: They are first buried in aluminum oxide powder, conduct low-temperature sintering at 800 degrees. Wait until the paraffin is completely vaporized and evaporated, then sent to a high-temperature kiln at 1,200 degrees for more than twenty hours. After the solidification and strengthening occur inside the ingredients, the blank becomes an indestructible ceramic. 【04】If it is a dry pressing ingredient, removing the wax is not necessary. It will be okay to carry out high-temperature sintering directly, so the cost of production is relatively lower. The alumina ceramics just sintered out: Its surface is very rough. If it is lithium-phosphorus daily porcelain fired like this, it will be basically scrapped. But alumina ceramics can use a little cosmetic surgery to save it. 【05】First, use ultrasonic vibration water washing: To remove the particles attached to the surface. Then, use a grinding machine to grind and polish. Inside the grinder, we use the grinding paste made of diamond powder. Grinding removes the particles on the surface. Polishing makes the surface of the workpiece like a mirror. In order to increase the lubricity of polishing: A little washing powder is added to the polishing paste. After polishing, the surface of the alumina ceramic feels as smooth and delicate as daily porcelain. 【06】Except for inspection, the most costly part is manual loading and unloading. To reduce the cost, factories will put different semi-finished products on one tray and sinter them together. Here, one hundred thousand pieces of alumina ceramics are made every day. Each one requires manual loading and unloading. Many black-light factories and unmanned factories are surfed on the Internet. In fact, most of the refined operations of small and medium-sized enterprises still rely on manual labor. 【07】Did you know? Ninety percent of alumina ceramics come from Loudi, Hunan, and appear everywhere you don't expect. Alumina, Silicon nitride, and Silicon carbide: All of them belong to advanced ceramics. Silicon nitride is quite popular these days, but it’s more expensive, costing hundreds of thousands per ton. 【08】In contrast: Alumina costs only several thousand yuan per ton, and the investment in equipment is also relatively low. Therefore, at present, alumina is the most widely used and has the highest utilization rate among advanced ceramics. As for the past and present of the 10-billion-yuan alumina ceramics in Loudi, we'll talk about it when there's an opportunity in the future.