By adding appropriate copper stearated, melamine, the PVC U products have excellent properties of pulverization preventing and ageing resistance such as inoxidizable, uvioresistant, weatherproof, ageing resistant properties, and excellent heat stabilization.

To improve the quality of sinter, boric acid as additive was added to the raw material to prevent the pulverization caused by the phase transition of calcium ortho-silicate (2CaO·SiO_2) during temperature decreasing.

To improve the quality of sintered ore and suppress the pulverization due to phase transition in temperature falling process, an experiment was conducted to use boric acid as additive into the mixture to be sintered.

By means of thermodynamic calculation,we discuss the transformation of Al_2OC and its influence on spontaneous degradation of SiAlFe while smelting SiAlFe in sumberged arc furnace.

Study of the Powdering Mechanisms of Ceramic Fiber and the Anti-powdering Methods ;

A new method for evaluating powdering rating of galvanneal coatings was studied based on computer techniques of image processing and pattern recognition theory,and a system of the powdering recognition and rating on the galvanneal coating had been designed.

The powdering cause of sinters is analysed and improving measure is put forward in this paper.

In this paper, the corrosion of materials in carbonaceous atmospheres at high temperatures is reviewed, including metal dusting and internal carburization.

The main shortages in ferrosilicon disintegration and the cause are analysed.

The phosphorus content is not the crucial factor of disintegration of the alloy studied.