Effect of binders on the damage threshold and refractive index of coatings prepared from colloidal suspensions

Conference · Thu Oct 01 04:00:00 EDT 1992

OSTI ID:6712296

Thomas, I M

Addition of polyvinyl alcohol (PVA) to aqueous suspensions of AlOOH, ZrO2 and HfO[sub 2] has been found to increase the damage threshold and refractive index of coatings prepared from these suspensions. The increase in damage threshold may be due to the increase in coating strength brought about by the enhanced particle-to-particle bond strength due to the polymer binder. The binder also increases the refractive index by decreasing the porosity. This leads to a reduction in the number of layer pairs required for high reflection in a typical HR coating. A mirror consisting of only ten layer pairs of HfO[sub 2]-SiO[sub 2] with PVA binder in the HfO[sub 2] had a reflectivity of over 99% at 1.06 [mu]m and a damage threshold of 25-28 J/cm[sup 2]at 1.06 [mu]m with a 10 ns pulse. 6 refs, 5 figs, 4 tabs.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6712296
• Report Number(s): UCRL-JC-111520; CONF-9210295--4; ON: DE93009068
• Country of Publication: United States
• Language: English

Related Subjects

440600* -- Optical Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
ALCOHOLS
ALUMINIUM COMPOUNDS
ALUMINIUM HYDROXIDES
ALUMINIUM OXIDES
BINDERS
CHALCOGENIDES
COATINGS
COLLOIDS
DAMAGE
DISPERSIONS
ELECTROMAGNETIC RADIATION
HAFNIUM COMPOUNDS
HAFNIUM OXIDES
HYDROGEN COMPOUNDS
HYDROXIDES
HYDROXY COMPOUNDS
LASER RADIATION
MIRRORS
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYMERS
POLYVINYLS
PVA
RADIATIONS
REFLECTIVE COATINGS
REFRACTIVE INDEX
REFRACTORY METAL COMPOUNDS
SUSPENSIONS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES