坩埚的投料
Crucible input material
错误的做法：冷的锭料水平的挤满在坩埚中，当加热熔解时，锭料膨胀会把坩埚挤破；当加料的方法不对时，坩埚的顶沿和侧壁容易受到损伤。Wrong practice: The cold ingot is packed in the crucible, when the heating and melting, the ingot expansion will crush the crucible; when the method of adding raw materials is not right, the crucible of the top and sidewalls are susceptible to damage.
正确的做法：大块的锭料要竖直放入坩埚中，确定锭料和坩埚之间有足够的空隙；用夹钳小心地把锭料和较重的材料放入坩埚中。
Right practice: Large pieces of ingot to be vertically into the crucible, to determine the ingot and crucible enough between the gap; with the clamp carefully put the ingot and the heavier material into the crucible.
一、坩埚放入炉内，最好是等自身红透，先放一点小型的金属碎料在坩埚底，待其熔化后，再放金属锭（金属锭下埚前必须放在炉沿边上烘烤），以免冷锭直接放进埚里，造成坩埚遇冷而炸裂。而且还必须保证这些材料在坩埚中受热时有足够的膨胀空间，否则坩埚容易被挤裂。Putting the crucible into the furnace, it is best to wait for their own red, first put a little metal scrap in the bottom of the crucible, to be molten, then put the metal ingot (metal ingot before the furnace must be placed along the edge of the baking oven) , In order to avoid cold ingots directly into the crucible, causing the crucible cold and burst. And you must ensure that these materials in the crucible when heated enough expansion of space, or crucible easy to be cracked.
二、烘烤的金属锭必须慢慢的竖着放进埚里。如横着放进去，金属锭热膨胀容易把坩埚挤破。往坩埚中投料时必须非常小心，最好是用夹钳把锭料和较重的材料小心地放入坩埚中。千万不要用倾倒的方式加料，锭料的棱角有可能撞裂坩埚。
Baking of the metal ingot must be slowly erected into the crucible. If placed sideways, the thermal expansion of the ingot tends to crush the crucible. Care must be taken when pouring raw materials into the crucible. It is advisable to carefully place the ingot and heavier material into the crucible with clamps. Do not use the dumping of the way to join the raw materials, ingot edges and corners may have cracked crucible.
三、使用过程中，埚里的金属水太少时，也不要一次加料太多，这样容易使埚内金属水遇冷而凝固，之后温度再次升高时，金属热膨胀而撑破坩埚。In the process, if the metal water in the crucible is too small, do not add too much raw material at one time, so that the metal water in the crucible will freeze and solidify, and then the temperature will rise again and the metal will expand and break the crucible.
