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 ahụ na-atụgharị ihe dị ugbu a site na ihe nrịbama na-arụ ọrụ dị elu na-arụ ọrụ n'ime mgbaàmà voltaji, Mgbe mmemme na-achịkwa ihe mgbaàmà, nchọpụta na-achọpụta na nzacha nke oge, a na-enweta akara ngosi nwere ike igosi conductivity; Microprocessor na-agbanye site na ngbanwe ka ọ tụnye akara ngosi okpomọkụ na mgbama conductivity. Mgbe ịgbakọ na ụgwọ okpomọkụ, a na-enweta ihe 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 ndị na-eguzogide ọgwụ mee ihe 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'ihe nleba anya 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 mgbe niile. N'ebe dị n'otu ebe ọkụ eletrik dị n'etiti electrodes, enwere ike gbakọọ electrode mgbe niile site na akụkụ geometric. Mgbe e kewapụrụ 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 anwalela ngwọta K = 1000μS / cm.
N'okpuru ọnọdụ nkịtị, electrode na-etolitekarị mpaghara 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 ma zie ezie 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, enwere ike ịnweta 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 KCL ngwọta.
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 samples nwere elu conductivity chọrọ elu cell constants. Ngwa nha ga-amarịrị mkpụrụ ndụ mgbe niile nke ihe mmetụta conductivity ejikọrọ wee mezie nkọwa ọgụgụ ya.
4. Gịnị bụ cell constants nke conductivity mita?
Igwe electrode conductivity abụọ bụ nke a na-ejikarị 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