Chemical News and Journal of Physical Science, Tom 117Chemical news office., 1918 |
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Strona 10
... alumina it contains as well as the potash . Felspar is a family name which includes many minerals , the two chief groups being- ( 1 ) potash felspar ; ( 2 ) silicates of lime and soda . Felspars are of wide occurrence . Granite consists ...
... alumina it contains as well as the potash . Felspar is a family name which includes many minerals , the two chief groups being- ( 1 ) potash felspar ; ( 2 ) silicates of lime and soda . Felspars are of wide occurrence . Granite consists ...
Strona 11
... alumina as for the alkali it contained . It was a cheaper method of giving glass all the beneficial results conferred by alumina than by using the calcined oxide , and was far more suitable than china clay for this purpose . Mr ...
... alumina as for the alkali it contained . It was a cheaper method of giving glass all the beneficial results conferred by alumina than by using the calcined oxide , and was far more suitable than china clay for this purpose . Mr ...
Strona 12
... alumina , and two - thirds of the silica of the original felspar , can readily be made to yield up its constituents , the potash being very much more loosely held then the aluminium . If the silicate is suspended in water between two ...
... alumina , and two - thirds of the silica of the original felspar , can readily be made to yield up its constituents , the potash being very much more loosely held then the aluminium . If the silicate is suspended in water between two ...
Strona 14
... alumina content ; for , while both lime and alumina com- bine with a number of different acids to form solids which upon melting exhibit no unusual degree of viscosity , the presence of silica in a chemical compound usually confers upon ...
... alumina content ; for , while both lime and alumina com- bine with a number of different acids to form solids which upon melting exhibit no unusual degree of viscosity , the presence of silica in a chemical compound usually confers upon ...
Strona 23
... alumina . All these impurities increase its fusibility . The authors have com- pared commercial bricks with those made of pure silica , measuring the resistance to crushing at various tempera- All the bricks showed a sudden fall of ...
... alumina . All these impurities increase its fusibility . The authors have com- pared commercial bricks with those made of pure silica , measuring the resistance to crushing at various tempera- All the bricks showed a sudden fall of ...
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