Flame fusion

Vemeud (flame fusion) mby, sapphires, and stars spinel mtile strontium titanate... 

The Verneuil Techni(jue. The VemeuH technique is also known as flame-fusion. A very pure feed powder is first made by chemical decomposition. For the growth of comndum, ammonium alum [7785-25-0] NH Al/(S0 2 12H20, is recrystallized from water containing added... 

Fig. 1. The Verneuil technique, or flame-fusion growth, as used for synthetic mby and sapphire.

II flame fusion of quart2 200-500 0 10-50 210 Homosil, OptosH, Vitreosil-055... 

Flame fusion is employed for growing of TiB, crystals, which melt congruently at... 

II Quartz powder Flame fusion (Vemeuille process) = Type I 100-400 Herasil Homosil Optosil O.G. O.H. Vitreosil ... 

Crystal Growth from Melts and Solutions 17.2.4.1. Growth from Melts 17.2.4.1.5. Flame Fusion Method. 

The flame fusion process was the first method to give crystals of acceptable size for commercial applications from the melt, namely ruby crystals for use as gemstones. 

The flame fusion method is used to grow sapphire crystals for bearings and similar applications, and tons of AI2O3 are crystallized annually, particularly in factories in Switzerland, France, Czechoslovakia, China, Japan, and Russia. Ruby, sapphire, and... 

Figure 1. (a) Schematic diagram of crystal growth by the flame fusion method, (b) Stages of development of undoped AI2O3 and Cr-doped (ruby) crystals, (c) Furnace room used for AI2O3 production by H. Djevahirdjian Company at Monthey, Switzerland. (Courtesy of V. Djevahirdjian.)... 

Table 1. Materials Grown by the Flame Fusion Process...

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