The results show that the toner with particle size about 12-13μm were obtained when the ratio of St to BA is 5,stirring speed is 1 000 rpm, ultrasonic dispersion time is 15 min,the ratio of W to O is 7,the dosage of PVA is 4 % and the polymerization temperature is 85℃. The particle size of polymerized toner can meet with the commercial requirements.
Gas_sensing material of semiconductor doped SO~(2-)_4 in In_2O_3 was prepared by ultrasonic dispersion dipping and the effect of SO~(2-)_4 doping on the conductivity and gas_sensing properties was investigated.
Gas-sensing material of semiconductor doped SO42- in In2O3 was prepared by ultrasonic dispersion dipping and the effect of SO42- doping on the conductivity and gas-sensing properties was investigated.
The results show that the effect is the best when ultrasonic dispersing the nano-particles for 1 h before adding them into the bath and by ultrasonic agitation in the plating process;
Experimental results show that satisfactory and stable dispersion TiO2 in aqueous solution is obtained under the condition of using the Na2SiO3 as dispersant which is 0.8% of TiOa in mass, pH between 8 to 10 and ultrasonic dispersing time about 10 minutes.
Liposome was prepared by converse film-ultrasonic technology further, combined high-speed stirring technique with ultrasonic dispersing way, the particle sizes were minished and distribution of granularity even more narrow, the effective particle sizes attain 126.8 nm, single distribution, centralize 125 run, polydisperality 0.286 and RSD 4.6% .
To utilize the waste aluminum synthetically,this paper researched the preparation of a new type of inorganic-organic polyblend-flocculant(PAAM) using the supersonic dispersion to deal with the waste aluminum and discussed the optimum technological condition.
The initially water-stable aggregates of 0.25-0.5 mm in size are subjected to several stages of their breakdown under the impact of ultrasonic dispersion with the detachment of small particles from their surface layers.
Soil was sampled in autumn 1984 in the 132 field (sandy loam soil) of the Askov long-term experiments (started in 1894) and fractionated according to particle size using ultrasonic dispersion and sedimentation in water.
Samples of whole soils, and clay- (>amp;lt;2 μm) and silt-(2-20 μm) size fractions (isolated by ultrasonic dispersion and gravity sedimentation) were analysed for labeled and native mineral-fixed ammonium.