铬酸钙

铬渣中因含有1～2%的具有致癌特性的铬酸钙和0.5～1%水溶性剧毒六价铬而成为有毒的危险废物。

Chromium residues are poisonous wastes , because there is 1-2 % calcium chromate and 0.5-1 % water-soluble Cr6 + .

介绍了一种制取铬酸钙的新方法，利用重铬酸钠溶液分解碳酸钙，可以得到高纯度的铬酸钙。

It is shown that calcium carbonate can be decomposed in aqueous sodium dichromate solution and transformed to calcium chromate at ambient pressure and boiling temperature .

运用X射线衍射仪对铬渣中所含矿物进行研究，可以看出铬渣中主要含有硅酸二钙和铁铝酸四钙，还含有铬酸钙、方镁石、方解石、铬铁尖晶石等矿物。

Through XRD , there are dicalcium silicate , tetracalcium ferrite , calcium chromate , calcite and chromium iron spinel mineral in chromium residues .

铬酸钙镧材料导电机理的探讨

The discussion of the conductivity mechanism of calcium doped lanthanum chromite material

此外，高碱度条件下的铬易跟方镁石或镁硅钙石形成固溶体或是铬酸钙，这会导致铬的渗出。

In addition , chromium tends to form solid solution or calcium chromate combined with periclase and merwinite in slags with high basicity .

人工合成硫酸型钙矾石和铬酸型钙矾石晶体的X射线衍射谱显示，铬酸型钙矾石的晶格比硫酸型钙矾石的稍大一些。

The lattice of chromate ettringite appears a little bigger than that of ettringite according to their X-ray diffraction patterns .

铬酸型钙矾石与硫酸型钙矾石的差异性研究

The differences between the characters of chromate ettringite and of ettringite

掺钙铬酸镧显微组织、性能与制备工艺的关系铬酸钙镧基复合氧化物的研究表明，添加氧化物的掺钙铬酸镧试样在1700℃烧结后，显气孔率和体积密度均较小。

Dependance of Microstructure and Properties on Preparation Process for Ca-Doped LaCrO_3 Average grain size and apparent porosity of the sintered bodies with high Ca content became great and high after sintered in the air .

同时在掺钙铬酸镧粉体中分别添加几种传统氧化物进行烧结，获得了一系列铬酸钙镧基复合氧化物试样，初步分析了它们的耐火性能，以考察其作为耐火材料的潜力。

On the other hand , the powders of Ca-doped lanthanum chromites mixed with several traditional oxides were sintered , and a series of complex oxides based on Ca-doped lanthanum chromites were obtained , then sintered characteristics were studied , in order to verify their potential of refractability .