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1前言亚光釉具有绢丝光泽。不眩目刺眼、美观大方的特点。通过研究瓷质外墙砖用釉的配方和工艺,成功地试制出能在1170~1200℃下实现快烧。白度好、釉面平整,且价格较低的锆乳浊亚光釉,并在生产中替代了外购的成品釉。从而提高产品釉面质量,并降低了生产成本。2配方与工艺2.1原料(1)超细锆英石:ZrO2含量65.52%,SiO2含量34.08%,粒径小于5μm的占70%~80%;(2)氧化铝:工业纯,Al2O3含量98.50%;(3)烧氧化锌:工业纯,ZnO含量98.79%;(4)碳酸钡:工业纯;(5)其它原料化学组成见表1。表1原料化学组成2.2配方… 相似文献
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苏联采取同步压制面砖坯体和釉层的方法取代了传统的上釉技术。苏维特研究所的工作者用体积密度为0.8克/厘米~3、流动度为35~50克/秒的釉粉进行了试验。一般说来,采用较大颗粒釉粉,其效果较好。采用KPK-125型压机压制成瓷砖。该压机装有特殊的釉粉供料部件,能形成厚度为0.3~0.7毫米的釉层。釉粉含水量为1~3%,坯体的含水量为5~7%。这种瓷砖烧成温度最高是980~1000℃,烧70分钟。釉面质 相似文献
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通过调整玻璃粉和氧化锌的比例,并添加适量长石和石英,以少量宝蓝色料为着色剂,成功研制出适合琉璃瓦一次烧成用的,烧成温度为1240℃的深蓝色亚光釉。 相似文献
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对500kV户外耐污棒形瓷绝缘子主体杆径开裂现象进行了分析,认为采用卧式淋釉法上釉上砂工艺,坯体受力复杂,对坯体的破坏较严重。采用悬挂式喷釉法上釉上砂工艺,制定了各项工艺参数,釉浆水分控制在30%~35%,坯体转速应为60r/min~80r/min,釉浆温度在60℃~90℃,坯体温度在40℃~60℃,釉层厚度为0.3 mm~0.5 mm,釉浆压力为0.3MPa~0.5MPa。消除了500kV户外耐污型棒形操作瓷绝缘子主体杆径开裂现象。 相似文献
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Evaluation of aluminum-silicate polymer composite as a coagulant for water treatment 总被引:18,自引:0,他引:18
Aluminum-silicate polymer composite (PASiC), a new kind of inorganic coagulant, was produced by two approaches: (1) hydroxylation of the mixture of AlCl3 and fresh polysilicate (PASiCc); (2) hydroxylated polyaluminum-chloride (PAC) combined with fresh polysilicate (PASiCm). The PASiC products had the following properties: Al2O3 content = 6.40-7.30%, SiO2 content = 0.40-0.82%, Al/Si ratios = 10-20, basicity (OH/Al molar ratio, denoted B) = 1.2-2.0. The coagulation behaviour of PASiC and PAC under conditions typical for coagulation and flocculation in water treatment were investigated by studying the rate of floc size development, the variety of streaming current value, the efficiency of turbidity removal and the effect of pH on the turbidity removal efficiency, and the stability of PASiC. The results detailed in this study suggest that, compared with PAC, PASiC may enhance aggregating efficiency and give better coagulating effects, but weaken charge effectiveness in coagulation process or become unstable when stored for longer time, especially at higher B value and lower Al/Si ratio. The coagulating effect of PASiC is closely linked to the preparation procedure. With the increase of B value and the decrease of Al/Si ratio, the coagulation efficiency of PASiC increases, and at the same B value and Al/Si ratio, PASiCc seems to give a little better coagulation effect than PASiCm but less stability. The Al/Si ratio should not be too low or the B value should not be too high, otherwise, the PASiC products tend to become cloudy or partly gelatinous, which will make them loss some coagulation efficiency. 相似文献