Kedu ụkpụrụ ihe ọmụma kwesịrị ịmụta n'oge eji mita conductivity?Nke mbụ, iji zere polarization electrode, mita ahụ na-ewepụta mgbaàmà sine kwụsiri ike nke ukwuu ma tinye ya na electrode.Ihe dị ugbu a na-asọ site na electrode kwekọrọ na conductivity nke ngwọta a tụrụ atụ.Mgbe mita na-atụgharị nke ugbu a site na ihe nrịbama na-arụ ọrụ dị elu na-arụ ọrụ n'ime mgbama voltaji, Mgbe mmemme na-achịkwa ihe mgbaàmà, nchọpụta na-achọpụta na nzacha nke oge, a na-enweta mgbaàmà nwere ike igosi conductivity;Microprocessor na-agbanye site na ngbanwe ka ọ tụnye akara ngosi okpomọkụ na mgbama conductivity.Mgbe ngụkọ na nkwụghachi ụgwọ okpomọkụ, a na-enweta ngwọta a tụrụ na 25 Celsius.Uru conductivity n'oge na ọnụ ahịa okpomọkụ n'oge ahụ.
Igwe ọkụ eletrik nke na-eme ka ions na-agagharị na ngwọta a tụrụ atụ na-emepụta site na electrodes abụọ na-ejikọta kpọmkwem na ngwọta.A ghaghị iji ihe na-eguzogide ọgwụ kemịkal mee ụzọ abụọ nke electrodes.Na omume, a na-ejikarị ihe ndị dị ka titanium eme ihe.A na-akpọ electrode nha nke nwere electrodes abụọ mejupụtara Kohlrausch electrode.
Ntụle nke conductivity kwesịrị dokwuo anya akụkụ abụọ.Otu bụ conductivity nke ngwọta, na nke ọzọ bụ geometric mmekọrịta nke 1 / A na ngwọta.Enwere ike nweta conductivity site na ịlele ugbu a na voltaji.A na-etinye ụkpụrụ nha a n'ọrụ n'ime ngwa ihe ngosi nke taa.
Na K=L/A
A——efere dị irè nke eletrọd ọ̀tụ̀tụ̀
L——Oghere dị n'etiti efere abụọ ahụ
A na-akpọ uru nke a cell na-adịgide adịgide.N'ebe dị n'otu ebe eletrik dị n'etiti electrodes, enwere ike gbakọọ electrode mgbe niile site na akụkụ geometric.Mgbe a na-ekewa efere abụọ square nwere mpaghara 1cm2 site na 1cm iji mepụta electrode, mgbe niile nke electrode a bụ K=1cm-1.Ọ bụrụ na ọnụ ahịa conductivity G = 1000μS jiri ụzọ electrodes tụọ ya, mgbe ahụ, conductivity nke ngwọta anwalela K = 1000μS / cm.
N'okpuru ọnọdụ nkịtị, electrode na-etolitekarị oghere eletrik na-abụghị otu.N'oge a, a ga-ekpebi cell mgbe niile na ngwọta ọkọlọtọ.Ngwọta ọkọlọtọ na-ejikarị ngwọta KCl.Nke a bụ n'ihi na conductivity nke KCl kwụsiri ike na nke ziri ezi n'okpuru ọnọdụ okpomọkụ na mkpokọta dị iche iche.Nrụ ọrụ nke 0.1mol/l KCl ngwọta na 25°C bụ 12.88mS/CM.
Ebe a na-akpọ ọkụ eletrik na-adịghị agbanwe agbanwe (nke a na-akpọkwa stray field, leakage field) enweghị mgbe niile, kama ọ metụtara ụdị na ntinye nke ion.Ya mere, igwe eletrọd dị ọcha kpafuru akpafu bụ electrode kacha njọ, ọ nweghịkwa ike gboo mkpa nke oke nha nha site na otu nhazi.
2. Gịnị bụ ngwa ngwa nke mita conductivity?
Ọdabara ubi: Ọ nwere ike ọtụtụ-eji na-aga n'ihu nlekota nke conductivity ụkpụrụ 'na ngwọta dị ka thermal ike, chemical fatịlaịza, metallurgy, gburugburu ebe obibi nchebe, pharmaceuticals, biochemicals, nri na mgbata mmiri.
3.What bụ cell mgbe niile nke conductivity mita?
"Dịka usoro K = S/G si dị, enwere ike nweta cell mgbe niile site na ịlele conductance G nke conductivity electrode na ụfọdụ ntinye nke KCL ngwọta.N'oge a, a maara conductivity S nke ngwọta KCL.
Eletrọd mgbe niile nke ihe mmetụta conductivity na-akọwa nke ọma njirimara geometric nke electrodes abụọ nke ihe mmetụta.Ọ bụ oke nke ogologo ihe nlele na mpaghara dị oke egwu n'etiti 2 electrodes.Ọ na-emetụta kpọmkwem uche na izi ezi nke nha.Ntụle nke ihe atụ nwere obere conductivity chọrọ obere cell constants.Ntụle nke ihe nlele nwere ihe nrụpụta dị elu na-achọ mkpụrụ ndụ dị elu.Ngwa nha ga-amarịrị mkpụrụ ndụ mgbe niile nke ihe mmetụta conductivity ejikọrọ wee mezie nkọwa ọgụgụ n'otu aka ahụ.
4. Gịnị bụ cell constants nke conductivity mita?
Igwe eletrọd abụọ bụ electrode conductivity ugbu a bụ ụdị electrode conductivity kacha eji eme ihe na China.Ọdịdị nke nnwale abụọ-electrode conductivity electrode bụ sinter abụọ platinum Ibé akwụkwọ na abụọ yiri iko Ibé akwụkwọ ma ọ bụ n'ime mgbidi a gburugburu iko tube ịgbanwe platinum mpempe akwụkwọ Mpaghara na anya nwere ike mere n'ime conductivity electrodes dị iche iche mgbe nile ụkpụrụ.A na-enwekarị K=1, K=5, K=10 na ụdị ndị ọzọ.
Ụkpụrụ nke mita conductivity dị ezigbo mkpa.Mgbe ị na-ahọrọ ngwaahịa, ị ga-ahọrọkwa ezigbo onye nrụpụta.
Oge nzipu: Dec-15-2021