Emulsions are estimated for their flow behaviour. The flow related attributes desirable for the performance of an emulsion are: Removal of an emulsion from a bottle or tube. Flow of an emulsion through a hypodermic needle. Spreadability of an emulsion on the skin. Stress induced flow changes during manufacture (milling). Dilute emulsions possess Newtonian flow,
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Stable emulsions can be produced by using emulsifying agents. These agents reduce the interfacial tension between the two phases and then separate the globules by creating a barrier at the interface. Surfactants are mainly used as emulsifying agents. The emulsifying agent’s solubility determines the kind of emulsion to be prepared. If using hydrophilic emulsifying agents
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S.No. n-type semiconductor p-type semiconductor 1. N-type semiconductor is obtained by doping an intrinsic semiconductor with pentavalent impurity. P-type semiconductor is obtained by doing an intrinsic semiconductor with a trivalent impurity. 2. Here electrons are majority carriers and holes are minority carriers. Here holes are majority carriers and electrons are minority carriers. 3. It has
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A semiconductor to which a suitable impurity in a controlled rate is added to increase its conductivity is called an extrinsic semiconductor. Based on the type of impurity added they are classified into two types. They are, n-type semiconductor p-type semiconductor N-type semiconductors Definition: When a small amount of pentavalent impurity or element with five
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