na2o

The kinetics of dephosphorization was studied by using CaO-FetO-SiO2 - ( Al2O3 , Na2O ) slags .

采用CaO-FetO-SiO2-（Al2O3，Na2O）炉渣进行了中高磷铁水脱磷动力学研究。

ω( Na2O + K2O ) 0.17 ~ 1.47 % , the majority less than 0.5 % ;

ω（Na2O+K2O）0.17%~1.47%，多数小于0.5%；

The vitrified binder of low soft temperature was prepared by using Na2O 、 B2O3 、 SiO2 as basic ingredients and some CaO as additive .

采用Na2O、B2O3和SiO2为结合剂基本成分，添加CaO制备出粘结金刚石的低熔陶瓷结合剂。

The manufacture method of waterglass ( Na2O . n SiO2 ) made of white carbon black ( SiO2 ) was reported . The experimental results demonstrated that the high quality waterglass could be obtained .

本文报导了用白炭黑（SiO2）制造胶体电解质用水玻璃（Na2O·nSiO2）的方法，并得到高质量的产品。

The results show that with the appropriate increase of precipitation time and decrease of temperature , the initial alumina concentration and molar ratio of Na2O / Al2O3 ( MR ) can obtain higher ratio of seeded decomposition .

结果表明：适当延长分解时间，降低分解温度，或采用Al2O3浓度和分子比较低的铝酸钠原液都可以得到较高的分解率；

Improving carbonization temperature or choosing reasonable gas ventilating system may reduce the liquor supersaturation , and then the coarse grain aluminium trihydroxide with good crystallization and low content of impurities ( Na2O , SiO2 ) can be produced .

提高分解温度和选择合理的通气制度可以降低铝酸钠溶液的过饱和度，生产结晶良好、Na2O和SiO2杂质含量低的粗颗粒氢氧化铝产品。

When CaF2 and ( K2O + Na2O ) are decreased to about 2.52 % and 0.19 % respectively , the viscosity and melting temperature of slag is reduced to the values close that of common BF slag .

渣中CaF2和（K2O＋Na2O）分别降至3.52%和0.19%左右时，炉渣粘度和熔化性温度就可接近普通高炉渣的水平。

The alkali equivalent ( count as Na2O ), module of water glass , water / binder ratio , binder / aggregate ratio , finess of slag and standard curing age all affect the carbonation of AASC mortars .

碱矿渣水泥砂浆的抗碳化性能与碱当量、水玻璃模数、水胶比、胶砂比、矿渣细度及养护龄期等有关。

The age is Miocene Epoch . K2O / Na2O is greater than 1 and the ore forming material consists of deep seated mantle derived material mixed with crust-derived material . The volcanic rocks formed and evolved during continent intraplate orogeny .

K2O/Na2O>1，说明成矿物质为深部幔源物质混合了壳源物质，属大陆板内造山晚期演化的火山岩类型。

With the development of molar charge ratio of Na2O / SiO2 , the crystallinity of the zeolite molecular sieve increases . But when the molar charge ratio of Na2O / SiO2 is over 1.5 , the crystallinity descends with the increase of alkali .

本文研究了反应配比对X型沸石分子筛合成的影响，随着Na2O/SiO2摩尔配比的提高，沸石分子筛的结晶度增加；但当Na2O/SiO2摩尔配比超过1.5时，其结晶度随着碱量的增加反而下降。

Diabase dikes exposed on the northwestern margin of the Tarim basin contain 44.34 % - 49.3 % SiO2 have higher values of Na2O + K2O ( 4.32 % - 6.04 % ) and Na2O / K2O ( 2.23-9.15 ), showing the features of intraplate basalt .

塔里木盆地西北缘出露的辉绿岩墙的SiO2含量为44.34%～49.34%，Na2O+K2O（4.32%～6.04%）和Na2O/K2O均较高（2.23～9.15），主量元素反映板内玄武岩的特点。