| 摘要 |
Plaster products comprising a mass of calcium sulfate dihydrate crystals intermingled with crystals of the double salt potassium sulfate-calcium sulfate hydrate and optionally the triple salt potassium sulfate-magnesium sulfate-calcium sulfate. Plaster products can be prepared from calcium sulfate dihydrate by adding to a water slum y of calcium sulfate dihydrate a potassium salt, especially potassium hydrogen-carbonate or potassium tetraborate but, in the first place, potassium sulfate, including a carrier, after which the water slurry is moulded and further worked in known manner to the desired plaster product, especially plaster board or moulds for the production of metal articles or ceramic articles. |
