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Silicon Dioxide industry competition and market-oriented

Since the 1990s, Michelin introduced the use of highly dispersed silica with low rolling resistance, energy saving green tires. Green tires for its comfort and safety, environmental protection and energy saving features, is loved by the public. Therefore, the silica in tires, rubber demand rapid growth, foreign countries have mandated the use of silica ratio, some domestic manufacturers have begun to use silica or related applications are being developed to improve tire performance and reduce production costs, Therefore, the prospects for development in the silica tire segment is very broad.

Silicon Dioxide is a white powder X- ray amorphous silica and silicate products, collectively, mainly refers to precipitated Silicon dioxide, fumed silica, silica gel and superfine airgel, including powder synthetic aluminum silicate and calcium silicate.

A method of determining the energy distribution of surface states at silicon-silicon dioxide interfaces by using low-frequency differential capacitance measurements of MOS structures is described. Low-frequency measurements make it possible to determine the silicon surface potential as a function of MOS voltage directly from the experimental data without requiring knowledge of the Si doping profile. No graphical differentiations are required to determine the surface state density from the experimental curves, and errors introduced by uncertainties in the silicon doping density are reduced. Also, it is shown that the measurements can be used to determine the relative lateral uniformity in the characteristics of the oxide and interface under the MOS field plate. Nonuniformities can result in large errors in the surface-state density derived from MOS capacitance measurements. Measurements are presented and interpreted for both n- and p-type silicon samples prepared by bias-growing the oxide in steam.



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