摘要
本文采用ＸＲＤ分析对硼砂和熔块配合料不同温度焙烧的试样进行系统的物相鉴定。确定硼砂在１００—４００℃变为β—Ｎａ２Ｂ４Ｏ７，５００—６００℃变为α—Ｎａ２Ｂ４Ｏ７，７００℃熔化。而以硼砂１９％，长石１８％，石英２４％，硅灰石１１％，锆英粉１２％，ＺｎＯ１０．５％，滑石２％，ＫＮＯ３３．５％为配方的熔块配合料焙烧过程的物相变化大体是：６００℃左右Ｎａ２Ｂ４Ｏ７先开始熔化，６００℃到９００℃滑石、ＺｎＯ、硅灰石、长石先后完全熔化，而石英和锆英石分别于７００℃和１１００℃开始熔化，直到１３００℃虽己基本熔化，但仍有少量残存。熔体成分由硼酸盐变成硼硅酸盐，最后变成锆硼硅酸盐熔融体。
The phase changes of borax and fritted glaze mix fired at different temperatures have been studied using XRD method. The results show that the borax is transformed to β-Na2B4O7 at 100-400℃,then to α-Na2B4O7 at 500-600℃ and finally melts down at 700℃. The phase changes take place in the fritted glaze mix(19% borax, 18% feldapar ,24% quartz , 11% wollastonite, 12% zircon,15% ZnO ,2% talc and 3. 5% KNO3) during fring as follows: Na2B4O7 firstly begins to melt at about 600℃. Tale ,ZnO, wollastonite and feldspar melt down completly from 600℃ to 900℃. Milting of quartz and zircon begin at 700℃ and 1100℃ respectively UP to 1300℃ they remain though most of them have been gone into the melt. As a result ,the composition of the melt changes from berate through boronic silicate to zirconic boronic silicate.
出处
《中国陶瓷》
CAS
CSCD
北大核心
1996年第6期5-9,共5页
China Ceramics
