Sample code

Molar ratio

Stability time/min

0

Mg/Al = 3:1

18.5

1

Mg/Al/urea = 3:1:1

31.5

2

Mg/Al/urea = 3:1:0.5

26.0

3

Mg/Al/urea = 3:1:1.5

24.0

4

Mg/Al/urea = 3:1:2

25.5

5

Mg/Al/NH₄Cl = 3:1:1

28.5

6

Mg/Al/NH₄Cl = 3:1:0.5

30.0

7

Mg/Al/NH₄Cl = 3:1:1.5

38.0

8

Mg/Al/NH₄Cl = 3:1:2

33.0

9

Mg/Al/ammonia = 3:1:1

30.0

10

Mg/Al/ammonia = 3:1:0.5

43.0

11

Mg/Al/ammonia = 3:1:1.5

39.0

12

Mg/Al/ammonia = 3:1:2

31.0