·
Linear Formula PbO
·
Molecular Weight 223.20
Lead(II) oxide, also called lead
monoxide, is the inorganic compound with the molecular formula PbO. PbO occurs in two polymorphs, one litharge having a tetragonal crystal structure and the other massicot having an orthorhombic crystal structure.
Detailed description
Modern
applications for PbO are mostly in lead-based industrial glass and industrial ceramics, including computer components.It is
an amphoteric oxide.
Applications
The kind of lead in lead glass is normally PbO, and
PbO is used extensively in making glass. Depending on the glass, the benefit of
using PbO in glass can be one or more of (1) increasing the refractive index of
the glass, (2) decreasing the viscosity of the glass, (3) increasing the
electrical resistivity of the glass, and (4) increasing the ability of the
glass to absorb X-rays. Adding PbO to industrial ceramics (as well as glass)
makes the materials more magnetically and electrically inert (raises the Curie temperature) and is often used
for this purpose. Historically PbO was
also used extensively in ceramic glazes for household
ceramics, and it is still used, but not extensively any more. Other less
dominating applications include the vulcanization of rubber and the
production of certain pigments and paints. PbO is used in cathode ray tube glass to block X-ray emission, but mainly
in the neck and funnel because it can cause discoloration when used in the
faceplate. Strontium oxide is preferred for the
faceplate.
The consumption of lead, and hence the processing of
PbO, correlates with the number of automobiles because it remains the key
component of automotive lead-acid batteries.
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