Fire, recrystallization

The material is fired again in a recrystallization process which involves heat-treating the rods at approximately 2500 °C in an inert atmosphere. This process transforms any / -SiC to the a-modification and partially removes residual silicon, permitting control over electrical resistivity. The resulting ceramic has a low porosity and consequently a long service life. 

Another use of it is to gently distil the liquid just to dryness. The clear, watery distillate has been called Angel Water and can be used in the recrystallization of the herbal salts. This liquid, loaded with the Secret Fire, becomes enmeshed with the crystalline matrix of the salts as they crystallize, thus revivifying them. This type of transference of subtle force always takes place in the liquid state, thus the Alchemists stressed Solution as one of the important stages in the work. The volatile becomes fixed and the fixed becomes volatile. The dried potassium carbonate can be recovered and reused. 

At harvest, the pile is leached with water and the water evaporated to obtain the niter as crystals which are then purified by recrystallizing several times. The commercial potassium nitrate of today is usually generated from the waste products of other chemical processing industries and is not considered to be Philosophical. This holds true for most of these salts we are discussing. Prior to use they must be reanimated or recharged with Fire. 

A student needed to purify a chemical using the process of recrystallization. He needed to use a very flammable solvent but he discovered that the laboratory hood that he intended to use was cluttered with no room for his experiment unless he first cleaned it up. So he decided to carry out the recrystallization on the benchtop. As the solvent boiled he added the crystals of the compound that he wanted to purify. Suddenly the vapors ignited and a Are ensued. Luckily the fire was extinguished and the student only received minor burns. 

Recrystallization Recrystallization often involves the use of flammable solvents that are heated and evaporated to produce a concentrated solution of the substance to be crystallized. Care must be taken to ensure that ignition sources are eliminated from the area of operation since many fires have resulted from vapors evaporating from these solutions being ignited by an ignition source, such as a non-spark-proof hot plate. Use steam heating wherever possible for these operations. 

Before experimental studies to optimize the recrystallization heat treatment of modified 3-eucryptite could begin, it was necessary to reproducibly form pure solid-solution 3-eucryptite. The first step taken was to determine the weight loss factor necessary for each raw material to obtain the correct composition of final product. For modified 3-eucryptite (Li0.41Mg0.035AIP0.52Si0.48O4), firing the exact batch amounts of raw materials at 1150°C for 100 h resulted in the formation of the modified 3-eucryptite phase and 10% free alumina as a secondary phase. 

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