ngwaahịa

BaTiO3 mkpụrụ

nkowa nkenke:

1. Mma fotorefractive Njirimara

2. High reflectivity nke onwe-pumped frasi conjugation


Nkọwa ngwaahịa

Mkpado ngwaahịa

Nkọwa

BaTiO3otu kristal nwere magburu onwe photorefractive Njirimara, elu reflectivity nke onwe-pumped frasi conjugation na abụọ-efegharị efegharị Ịgwakọta (optical mbugharị) arụmọrụ na ngwa anya ozi nchekwa na nnukwu nwere ngwa, nke bụkwa ihe dị mkpa mkpụrụ ihe.

Njirimara

Ọdịdị kristal Tetragonal (4m): 9 ℃ <T <130.5 ℃a = 3.99A, c= 4.04A,
Uzo uto Uto Ngwọta Mkpụrụ kacha elu
Ebe mgbaze (℃) 1600
Njupụta (g/cm3) 6.02
Dielectric Constant ea = 3700, ec = 135 (anaghị agbakọ)ea = 2400, e c = 60 (mkpọchiri)
Index nke ntụgharị uche 515 nm 633 nm 800 nmmba 2.4921 2.4160 2.3681ne 2.4247 2.3630 2.3235
Ogologo nnyefe 0.45 ~ 6.30 mm
Ngwakọta eletrọnịkị rT13 = 11.7?1.9 pm/V rT 33 =112 ?10 ehihie/VrT 42= 1920 ?180 pm/V
Ntụleghachi nke SPPC(na 0 deg. bee) 50 - 70 % (max. 77%) maka l = 515 nm50 - 80 % (karịrị: 86.8%) maka l = 633 nm
Ngwakọta ebili mmiri abụọ na-ejikọta ọnụ 10-40 cm-1
Mfu nke absorption l: 515 nm 633 nm 800 nma: 3.392cm-1 0.268cm-1 0.005cm-1

Nkọwa mkpụrụ nke BaTiO3

Mkpụrụ BaTiO3 na-ezo aka na mkpụrụ osisi kristal mere nke barium titanate (BaTiO3).BaTiO3 bụ ihe ferroelectric nke nwere usoro kristal perovskite, nke pụtara na ọ nwere ihe eletrik pụrụ iche, na-eme ka ọ dị mma maka ngwa dị iche iche.

A na-ejikarị ihe ndị BaTiO3 eme ihe n'ọhịa nke ihe nkiri dị mkpa, a na-ejikwa ya eme ihe na-emepụta ihe nkiri epitaxial dị mkpa nke ihe dị iche iche.Ọdịdị kristal nke mkpụrụ ahụ na-enye ohere nhazi nke ọma nke atom, na-eme ka uto nke ihe nkiri dị nro dị elu nwere ihe ndị dị mma nke crystallographic.Njirimara ferroelectric nke BaTiO3 na-arụkwa ọrụ dị mkpa na ngwa dịka ngwa eletrọnịkị na ngwaọrụ ebe nchekwa.Ọ na-egosipụta polarization ozugbo na ikike ịgbanwe n'etiti steeti polarization dị iche iche n'okpuru mmetụta nke mpaghara mpụga.

A na-eji ihe onwunwe a na teknụzụ dị ka ebe nchekwa na-adịghị agbanwe agbanwe (ebe nchekwa ferroelectric) na ngwaọrụ eletrọnịkị.Na mgbakwunye, BaTiO3 substrates nwere ngwa dị iche iche dị ka ngwaọrụ piezoelectric, sensọ, actuators, na ngwa ngwa ngwa.Ihe dị iche iche nke ọkụ eletrik na igwe nke BaTiO3 na-enye aka na ọrụ ya, na-eme ka ọ dị mma maka ngwa ndị a.


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