Washington Mills manufactures hollow insulating spheres, otherwise known as alumina bubbles, made from high-purity alumina. Alumina bubbles act as a versatile and lightweight refractory mineral. Alumina bubble's unique structure makes it an excellent insulating material that has low thermal conductivity and can withstand exceptionally high temperatures. Bubble alumina's superior insulating properties will keep an outer shell cooler or help a kiln maintain a steady temperature. The alumina ...This story is related to the following:Materials and Material Processing Sponsored by: EXAIR Corporation - Category Sponsor March14Search for suppliers of: Alumina | Alumina