德恩數(shù)控：玻璃干燥的四個環(huán)節(jié)

1, the drying process of four stages: the stage of heating, drying period and falling rate drying stage, balance drying stage
2. The main physical and chemical changes in the liquid phase were briefly introduced.  
Low temperature stage: the discharge of water to reduce the quality, leaving the porosity increases, the particles closer to the volume shrinkage. In the middle temperature stage, the chemical changes: the oxidation reaction, the decomposition reaction, the crystal form transformation, the production of a small amount of liquid phase. Physical changes: the structure of water and the decomposition of gas, the body mass decreased, density increased, according to the formula of clay, quartz content of the number of different degrees of change in volume. High temperature oxidation stage: 1) insulation stage (2) generation of glass phase (3) what are the formation of mullite, 3 factors influencing sintering?  
Low temperature preheating stage, middle temperature stage, high temperature stage, high temperature thermal insulation stage, cooling stage

1、干燥過程四個階段：加熱階段、等速干燥階段、降速干燥階段、平衡干燥階段

2、簡述液相燒成各階段所發(fā)生的主要物理化學(xué)變化。低溫階段：排出水分使質(zhì)量減輕、留下氣孔使氣孔率增加、顆粒緊密靠攏使體積收縮。

中溫階段：化學(xué)變化：氧化反應(yīng)、分解反應(yīng)、晶型轉(zhuǎn)變、少量液相的生成。

物理變化：結(jié)構(gòu)水和分解氣體排除，坯體質(zhì)量減小，密度增加，根據(jù)配方中粘土、石英含量的多少發(fā)生不同程度的體積變化。

高溫階段：

1）氧化保溫階段

2）生成玻璃相

3）生成莫來石

3、影響燒結(jié)的因素有哪些？

低溫預(yù)熱階段、中溫階段、高溫階段、高溫保溫階段、冷卻階段

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