可溶盐NaCl/NaNO3对陶质样品的破坏作用分析

针对目前关于典型可溶盐NaCl、NaNO3和两者的复合盐对陶质文物破坏作用的研究空白，在分析不同可溶盐以及复合盐溶液的表面张力、浓度变化以及平衡结晶相等的基础上，采用超景深显微系统和自动压汞仪等设备研究可溶盐NaCl/NaNO3对模拟陶质样品的破坏过程和方式，结果表明：复合盐的吸水一失水能力远远高于单一的NaCl和NaNO3，其在陶质样品中的溶解一结晶加速，破坏作用高于单一的可溶盐NaNO3；同时，含复合盐陶质样品的呈蘑菇状包裹的盐硬壳层在相对湿度的变化过程中，连续的盐结壳面积逐渐降低，不连续的结壳层面积增多，样品的平均孔径变小，小孔体积含量增加，微小裂缝逐渐扩张。本研究分析复合盐NaCl/NaNO3破坏陶质文物的过程和作用，为酥粉陶质文物的进一步保护研究提供科学依据。

Destructive analysis of soluble salt NaCl/NaNO3 on pottery samples

As for similar research had not been reported about the discussion of the soluble salt NaCl, NaNO3 and their composite in effloresces pottery, the analysis of the properties such as surface tension, concentration and equilibrium crystalline phase of salt solution and their composite were studied, as well as the destructive process and effect of the salt for the pottery was discussed with the test methods of digital microscope and automatic mercury porosimetry etc. The results indicated that the ratio of dissolution and crystallization of composite salt NaCl/NaNO3 was accelerated in pottery samples and the damage effect was serious on the condition of the ability of water absorption and desorption in composite salt NaCl/NaNO3 was much higher than that in single NaCl or NaNO3. The mushroom shaped salt crust in composite salt was wrapped in the pottery particles tightly and the area was gradually decreased under the relative humidity cycles, the micro-cracks was expanded expressed in the continuous salt crust area was decreased and the discontinuous area was increased, which showed as the average pore size of the pottery sample was decreased and the contents of microporous was increased. In all, the process and the action of composite salt NaCl/NaNO3 or the pottery samples were studied for the sake of scientific research in next protection.