Abstract
Chemical composition of ceramic materials is one of the key properties and its determination is complex and time-consuming. The melting of silicon dioxide is the most important and difficult step for its determination. This paper is about optimizing the pretreatment method from the test standard, QB/T 2578-2002 <Standard test method for chemical composition of ceramic materials by spectrophotometry>. It is not convenient to use mixed flux (lithium hydroxide and boric acid) for melting ceramic materials. We replaced it by lithium metaborate and inspected the influence. After optimization, ceramic materials can be melted more completely. The test steps don’t change much except CaOandthe test result is the same as before.
Highlights
Chemical composition of ceramic materials has important influence on physical and chemical properties of ceramics
There are two common test methods at present, conventional chemical analytical methods and advance instrumental analytical method[1,2,3].It takes more chemical reagents, more test steps and more times to complete the test by chemical analytical method
This paper discusses the replace of mixed flux by lithium metaborate
Summary
Chemical composition of ceramic materials has important influence on physical and chemical properties of ceramics. Soit is important to test chemical composition of ceramic materials. Ceramic materials usually contain SiO2, Al2O3, Fe2O3, TiO2, CaO, MgO, Na2O, K2O and so on. Instrumental analytical method is sample, quick and friendly to environment because of simultaneous determination of multi-element and less reagents [4,5].The common step of both method is sample dissolution, and it is difficult to dissolve SiO2. There are two usual methods for SiO2 dissolution, alkali fusion and acidolysis. Alkali fusion is more safer and friendly to environment because acidolysis needs HF. The common agents of alkali fusion are lithium metaborate [6], sodium carbonate[7] and mixed flux [7-8]. The mixed flux on QB/T 2578-2002 is lithium hydroxide and boric acid. This paper discusses the replace of mixed flux by lithium metaborate
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