Reviewing the analysis of silicons produced in Iran; design and construction of furnaces to produce lead glass by sintering and analyzing the end products

In this project there was always the need of a furnace and cast; therefore, the work was concentrated on construction the furnace and designing the cast. Many numbers of graphites were prepared and by altering their dimensions it was tried to obtain the best conditions from point of view of material and dimensions. Because in this type of furnace having the proper graphite in fact prepared to work with the furnace, because graphite was the heat transfer to the body and also was the cast of the body. The advantage of using graphite furnaces was the heating up of graphite soon, and there was not the problem of sticking to the cast. The disadvantage was the restriction of dimensions. Therefore, the glass size was also limited. another disadvantage was the temperature range to melt the sample. By varying the glass formulation the melting point of the sample also varied. So that by reducing the lead percentage the melting point increased, and restricted to fabricate glass with low percentage of lead