实验室里铜燃烧匙在演示中常被烧穿或腐蚀,损耗量颇大,若有的实验(如硫的燃烧)改用瓷燃烧匙可耐高温且现象明显。实验室里酒精灯常因灯帽或瓷芯环破损而造成整体的报废。用以下介绍的烧瓷法,可以自制瓷燃烧匙和酒精灯瓷芯圈,还可作为第二课堂结合硅酸盐教材而开展的活动内容。一、制作方法1.将瓷土(高岭土或其它纯粘土)晒干、粉碎,通过50目的细筛,即得细土粉。(小工厂采用泥浆沉降法除去粗砂砾。)2.在土粉中拌入2%氧化镁、3—5%氧化铝或灼烧过的熟土粉,拌匀后加水揉成泥团 The copper burning spoons in the laboratory are often burned or corroded during the demonstration, and the amount of wastage is quite large. If any experiment (such as sulfur burning) uses porcelain burning spoons, it can withstand high temperatures and phenomena. The alcohol lamp in the laboratory often causes a total scrap due to the damage of the lamp cap or porcelain core ring. With the porcelain firing method described below, you can make your own porcelain burning spoon and alcohol lamp porcelain core ring, and you can also use it as the activity content of the second classroom combined with silicate teaching materials. First, the production method 1. Porcelain clay (kaolin or other pure clay) dried, crushing, through a fine mesh of 50 mesh, to obtain fine soil powder. (The small factory adopts the mud sedimentation method to remove the coarse gravel.) 2. Mix 2% magnesium oxide, 3-5% alumina or burnt ripe clay powder in the soil powder, mix and add water and knead into a clay ball.