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1. Hemihydrate can be used instead of gypsum.

2. Excessively high temperature causes formation of hemihydrate.

3. Stable hemihydrate agglomerates with good filtering properties were obtained.

4. The absorption of sodium stearate on hemihydrate calcium sulfate whiskers surface is uneven and the absorption state changes with additive amount.

5. Wall body material has been made by using hemihydrate gypsum, cement and composite foamer. Foamer could bring good foaming result in gypsum mortar.

6. Furthermore,[sentencedict.com] the integration of preparation and stabilization of hemihydrate calcium sulfate whiskers can be achieved by adding agents in different steps.

7. Wall body material has been made by using hemihydrate gypsum, cement and composite foamer.

8. Using hemihydrate gypsum as main raw materials and frothing by gum rosin composite vesicant to produce gypsum heat preserving material.

9. Choosing potassium sulfate as an activator to stimulate the activity of natural anhydrite, and modified its properties by adding Portland cement and hemihydrate gypsum respectively.

10. The results showed that the absorption state was different with additive amount varied and the crystallization course of hemihydrate calcium sulfate was greatly affected by sodium stearate.

11. The mixture includes from about 50% to about 98% by weight calcium sulfate hemihydrate.

12. An organic wetting agent or foam suppressant is quite helpful in the formation of filterable hemihydrate.

13. The calcium sulfate whisker is a fibrous monocrystal of calcium sulfate dihydrate, calcium sulfate hemihydrate or anhydrous calcium sulfate.

14. Hot curing in 70 C dry-air is the optimal industrial curing mode and the best curing mode is hot wet-dry cycle curing of hardened hemihydrate gypsum-fly ash paste.

15. Plaster of paris: Quick-setting gypsum plaster consisting of a fine white powder, calcium sulfate hemihydrate, which hardens when moistened and allowed to dry.

16. The calcium sulphate dihydrate whisker is treated by microwave heating, forming calcium sulfate hemihydrate or anhydrous sulphate of calcium after dehydration.

17. From this it is deduced that the hydration of hemihydrate calcium sulfate whiskers is different from hemihydrate gypsum's.

18. The progress of these technologies leads to the practical stage in technical development of the hemihydrate process for phosphoric acid production and its commercialization is realized.