1.玻璃制品:
    石英坩埚属特种玻璃制品,易碎。在搬运、使用等过程中应轻拿轻放,避免撞击。


2.储存:
    石英坩埚应保存在温度、湿度相对稳定的清洁环境中,以防产生结露等现象。


3.洁净度:
    石英坩埚为免洗产品,必须在洁净环境中开袋使用。使用前,石英坩埚应保持出厂的包装状态。


4.析晶:
    石英玻璃的析晶是指石英玻璃由亚稳态(玻璃态)向晶态(稳定态)的转变。在不同的温度及压力下,石英分别以不同的稳定物相存在。石英玻璃在高温下长时间使用或在被污染的状态下加热会发生析晶现象。析晶一般在1200度时开始发生,并且随温度的增加,析晶速度迅速增加。杂质或污染会降低石英玻璃析晶温度,即使极少量的杂质或污染,也会导致石英玻璃在1000度以下发生析晶现象 。特别是碱金属和碱土金属,譬如Na, K 和Ca,或者他们的化合物,会十倍甚至百倍的加速析晶。析晶会极大地影响石英玻璃的性质和使用。


1.Glass  Product:
    Quartz Crucible is special glass product which is fragile. Care should be taken during transportation, usage etc.
 

2.Storage:
    Quartz Crucible should be kept in clean environments with relatively stable temperature and humidity, to avoid condensation of moisture etc.


3.Cleanness:
    Quartz Crucible can be used without cleaning again.Wrapping should be opened in cleanenvironments. Before use, Quartz Crucible should be stored in its original packaging.
 

4.Devitrification:
    Devitrification of quartz glass refers to a change from a semi-stable glass to a crystallized stable cristobalite. Under different temperature and pressure, Quartz exists as different stable form.This phenomenon occurs when quartz glass is used at high temperatures for an extended duration or heated with impurities. Devitrification normally starts when the temperature rises above 1200 and isaccelerated as temperatures become higher. Impurity or contamination can obviously lower the devitrification temperature.With only small amounts of impurities, devitrification can easily occur even at temperatures below 1000. In particular, alkalis or alkaline metals, such as Na, Kand Ca, can generate devitfification tens or hundreds of times than normal. Devitrification can significantly influence the properties and use of quartz glass.

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