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ADVANCED APPLICATION OF LIME

石灰的高级应用

基本信息

批准号：
07555671
负责人：
KATO Akio
金额：
$ 0.9万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555671/
关键词：
CaCO_3 Coating Conducting Coloration

项目摘要

1. Conducting coating of CaCO_3Ag coated calcite was obtained by calination of Ag_2CO_3 coated calcite prepared by ion exchange method from AgNO_3 aqueous solution with the suspension of calcite particles. The coating on calcite was most uniform by calcination at 400-500ﾟC of the particles prepared at 40ﾟC,under [AgNO_3]=1.8*10^<-2>M and suspension of calcite=1-4g/1 for 3-6h. The conductivity of Ag coated calcite was measured by Impedance gain-phase analyzer (Solartorn, SI-1253).2. Synthesis of colored CaCO_3(1) Solid solution with transition metal ionThe crystallization of CaCO_3 by co-precipitation from mixed aqueous solution of Ca(NO_3)_2 and Na_2CO_3 homogeneous precipitation using (NH_2)_2CO was investigated in the pressence of Ni^<2+>, Co^<2+>, Mn^<2+> or Fe^<3+> ion. The resulting CaCO_3 was colored slightly with the color of metal ion. The addition of Ni^<2+> and Mn^<2+> made change the lattice constant of calcite particles prepared at 35ﾟC.The lattice parameter of aragonite prepared at 90ﾟC with Mn^<2+> ion addition also changed. These results suggest their substitution for Ca^<2+> ions in CaCO_3.(2) Coating of Ni compound on CaCO_3Ni compound-coated CaCO_3 particles were prepared by heating Ni (NO_3)_2 aqueous solution with the suspension of calcite particles. Calcite was most uniformly coated by NiCO_3・6H_2O and colored light green by the reaction at 70ﾟC,under [Ni (NO_3)_2]=0.01M and suspension of calcite=0.1M for 5h.(3) Coating of CO compound on CaCO_3As coating of Ni compound, Co compound-coated CaCO_3 particles were prepared. The coating was most uniform at 70ﾟC,under [Co (NO_3)_2]=0.001-0.01M,and suspension of calcite=0.1M for 5h. The color of resulting particles were measured by UV seactro photometer (Hitachi Co., U-3300). The color of deposit was blue under [Co (NO_3)_2]=0.001M,and violet under [Co (NO_3)_2]=0.01M.

1.CaCO_3Ag包覆方解石导电涂层是通过离子交换法由AgNO_3水溶液制备的Ag_2CO_3包覆方解石与方解石颗粒悬浮液一起煅烧得到的。将40℃制备的颗粒在[AgNO_3]=1.8*10^-2M、方解石悬浮液=1-4g/1、400-500℃下煅烧3-6h，方解石上的涂层最为均匀。采用阻抗增益相位分析仪(Solartorn, SI-1253)测量Ag包覆方解石的电导率。 2． (1)过渡金属离子固溶体的合成在Ni^<2+>、Co^<2+>、Mn^<2+>或Fe^<3+>离子存在下，研究了Ca(NO_3)_2和Na_2CO_3混合水溶液中(NH_2)_2CO均匀沉淀共沉淀法结晶CaCO_3的过程。所得CaCO_3略带金属离子的颜色。 Ni^<2+>和Mn^<2+>的添加使35℃制备的方解石颗粒的晶格常数发生变化。添加Mn^<2+>离子后90℃制备的文石颗粒的晶格参数也发生了变化。这些结果表明它们取代了CaCO_3中的Ca^2+离子。(2)CaCO_3上Ni化合物的包覆Ni化合物包覆的CaCO_3颗粒是通过加热Ni(NO_3)_2水溶液与方解石颗粒的悬浮液制备的。方解石在[Ni(NO_3)_2]=0.01M、方解石悬浮液=0.1M、70℃条件下反应5h,NiCO_3·6H_2O最为均匀,呈浅绿色。(3)在Ni化合物的CaCO_3As涂层上涂覆CO化合物,制备了Co化合物涂覆的CaCO_3颗粒。 70℃、[Co(NO_3)_2]=0.001-0.01M、方解石悬浮液=0.1M、5h时涂层最为均匀。通过UV分光光度计(Hitachi Co.，U-3300)测量所得颗粒的颜色。在[Co(NO_3)_2]=0.001M下沉积物颜色为蓝色，在[Co(NO_3)_2]=0.01M下沉积物颜色为紫色。