【摘要】 本文考察了烧成温度、陶瓷坯体中常见氧化物 ,以及二氧化硅包裹对铁红呈色稳定性的影响。结果表明 ,陶瓷坯体中铁红的呈色主要受四种因素影响 :( 1 )温度 ,高温下铁红本身不稳定 ,易失氧而成黑色四氧化三铁 ,因此对呈色不利 ;( 2 )陶瓷坯体中某些活泼成分 (如氧化钙等 ) ,高温下易与铁红反应生成其它颜色的物质 ,因此对呈色不利 ;( 3 )陶瓷坯体中另一些活泼成分 (如氧化镁等 ) ,高温下也易与铁红反应 ,但生成物较稳定且接近红色 ,因此对呈色影响不大 ;( 4)陶瓷坯体中稳定成分 (如二氧化硅等 ) ,在通常温度( 1 2 0 0℃ )下不与铁红反应 ,但对铁红起到了物理包裹作用 ,对呈色有利。这四个因素交叉影响 ,最终导致产品呈色既与温度有关 ,又与坯体组成有关。更多还原

【Abstract】 It has been found that the colour of red iron oxides in ceramics is affected by sintering temperature and the compositions of the ceramics.The reasons for these remain unclear and therefore have been studied here.Particularly,the stability of red iron oxides,the reactivity with other oxides,and silica wrapping effect have been studied.The results show that the colour of the red iron oxides in ceramics is affected mainly by four factors:(1)sintering temperature:the red iron oxide itself is unstable at high temperature,and tends to become black Fe 3O 4 by releasing O 2;(2)some active components in ceramics;these components,such as CaO etc.,would react with the red iron oxide and produce non-red compounds;(3)some other active components in ceramics;these components,such as MgO etc.,would also react with the red iron oxide but produce red-like compounds;(4)stable components:these components,such as Al 2O 3,SiO 2,can not react with the red iron oxides.Of the four factors above,the forth factor improves the colour stability of the red iron oxides in ceramics through physical wrapping;the first and second factors would deteriorate the colour of the red iron oxides in ceramics;the influence of the third factor is very limited.更多还原