A B Photo,1 The tendency to form glass phasc and homogenization of melted fluxes(A,prefused flux;B,simply mixed flux) 2.3 Effect of the Particle Size of Raw Materials The strong effect of particle size on the melting behaviour of simply mixed fluxes have been proved by some researcherst10-111.In these experiments,the particle sizes of raw materials were classified into four grades (75-100 mesh,100- 150 mesh,150-200 mesh,and<200 mesh)to compound the prefused flux and sim- ply mixed flux.The melting curves of fluxes under the condition of the heating rate in the range of 5.5-6.8C/min has been recorded and shown in Fig.5. .5-100mesh 100-150mesh 1.00 0.75 0.5 0.25 150-200mcsh <200 mesh 1.0 0.75 0.5 0.25 12601300 13801260 1340 1430 t,℃ Fg.5 The effect of particle size on the melting behaviour of simply mixed (.and prefused (o)flux It was concluded that the melting temperature of prefused powdcr flux was always lower than that of simply mixed flux for all grades of particle size,but 520鄂 豪 疾汾 魏 。 ， 一 一 ， 一 ， ， 一 ， 。 一 。 “ 。 一 工。 。 ’ 一 一 汀旧 钧 入 飞 ， 、 飞 免 侣 月 蕊 、 中 〔〕 一 、 二盔 主 轰 、， 风 花 飞叨 、 了 ， 、 忽吕兰。 ‘ 讼 。 · ， ℃ 卜 豆