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Ihe ịchọ mma ọla ọcha 925

bụ akara nke ndị omenkà na-eji egosi na ọlaọcha a na-eji bụ nke kacha mma. Mgbe ịzụrụ ọla ọla ọcha jide n'aka na ọ bụ ọlaọcha 925, n'ihi na ọ bụ ọlaọcha kacha mma dị.

Ọla ọla ọcha na-abụ ụdị ọla ndị mmadụ na-azụkarị. Site na ọla aka, mgbanaka, ọla ntị ruo mma, pendants, wdg, ị nwere ike ịhụ ọla ọla ọcha a na-eyi ma n'oge pụrụ iche, na oge nkịtị. Ọla ọla ọcha na-eme ọmarịcha ụbọchị ọmụmụ na onyinye ncheta.

Na United States, US Federal Trade Commission (FTC) ekwuola na enweghị ike ịre ọlaọcha dị ka ọlaọcha, ọlaọcha na-egbuke egbuke, sterling, ọlaọcha siri ike, ma ọ bụ mbiri nke Ster., ma ọ bụrụ na ọ nwere opekata mpe 92.5% ọlaọcha dị ọcha. Ma, gịnị bụ ọlaọcha 925 a? Gịnị kpatara na ọ bụ iwu na ịzụrụ ọlaọcha nke ọkwa a?

Gịnị bụ ?

Ọlaọcha dị ọcha (ọlaọcha 99%) bụ ihe a na-ahụ anya, ductile ma dịkwa nro. Ọdị nro ya na-eme ka ọ dị mfe iji rụọ ọrụ. Otú ọ dị, ọ na-esikwa ike kpụchaa ya ngwa ngwa. N'ụdị ya dị ọcha, ọlaọcha bụ ọla dị mma ma dịkwa oke ọnụ.

Otú ọ dị, ebe ọ bụ na a na-akpụ ya ngwa ngwa, ọ dịghị mma ịme ihe ndị na-arụ ọrụ. N'ime otu ma ọ bụ abụọ ejiri ya, ọ na-etolite ọdịdị chara acha na nrụrụ. Ya mere, a na-emepụta ihe nke ọlaọcha.

A na-agwakọta 92.5% nke ọla ọla ọcha na ọla kọpa 7.5% iji nweta ọla ọcha 925. Ọla kọpa 7.5% agbakwunyere na-enye ọlaọcha ahụ ike dị mkpa ọ chọrọ. Ebe ọ bụ na agbakwunyere ọla kọpa 7.5%, yana ọdịnaya 92.5% fọdụrụ dị ka ọlaọcha, a na-echekwa ductility na amara nke ọla ọla ọcha.

E wezụga ọla kọpa, a pụkwara ịgbakwụnye ọla ndị ọzọ dị ka germanium, platinum, na zinc na ọlaọcha iji mee ọlaọcha kasị mma. Otú ọ dị, n'ihe gbasara ụkpụrụ ụlọ ọrụ, a na-akwadebe ọlaọcha 925 naanị site n'ịgbakwụnye ọla kọpa.

ọlaọcha 925 dị ọnụ ala adịghị ọnụ ka ọlaọcha dị ọcha ma dịkwa ọnụ ala. A na-eji ya akwado ụdị ọla ọlaọcha dị iche iche dị ka ọla ntị, olu olu, mgbanaka, mgbaaka imi, mgbaaka, mgbaaka ụkwụ, wdg.

Ihe ịchọ mma na-esi na ya pụta na-adịgide adịgide ma na-eguzogide ọgwụ karịa ọla ọlaọcha dị ọcha. Ọzọkwa, mgbe a na-etinye nkume bara nnukwu uru n'ime , uru ya na-abawanye ọbụna karịa.

Ị ga-ahụ ọtụtụ brik a ma ama yana ụlọ ahịa dị n'ịntanetị na-ere. Ha na-elekọta ndị ahịa buru ibu na-achọ ọla dị ọnụ ala.

Ọtụtụ mgbe, ego ọlaọcha 925 na-adịkwa nke dị na ọnụ ala dị ọnụ ala. Enwere ụdị aghụghọ dị iche iche dị ma ọ bụrụ na ị ka na-enweghi obi ụtọ, ị nwere ike ịmebe ọla gị nke ọma ka ọ dabara na mmasị gị na mmasị gị.

Igwe ọla ọcha dị ka ọla edo bụ ọla mara mma nke na-adịghị emeghachi omume ma ọ bụ oxidize mgbe a na-akpọbata ya na sulfide na ikuku. Otú ọ dị, ebe ọ bụ na ọla anyị na-azụta bụ, ka anyị ghara ichefu na ọ nwere ọla kọpa.

Ọla ndị dị ka ọla kọpa, zinc, na nickel na-esi na sulfide dị n'ikuku na-eme ka ọ gbaa ọchịchịrị. Ọ bụ oxidation nke ọla kọpa dị na ọla na-eme ka mpempe ọla ọlaọcha na-agba ọchịchịrị ma mebie mgbe oge ụfọdụ gasịrị. Ịcha ọlaọcha na-acha odo odo bụ mmeghachi omume na-agbanwe agbanwe, na sheen nwere ike iweghachite site n'ịchacha ígwè ahụ.

Iji belata ọnụego ọla ọla ọcha gị na-acha edo edo, debe ọla ahụ ka ọ ghara ịdị mmiri mmiri na gburugburu mmiri. Enwere ike ime nke a site na ịchekwa ha n'ime akpa ikuku ma ọ bụ akpa mgbochi mmebi.

Ọzọkwa, mgbe ejiri ya mee ihe ọ bụla, hichaa ha na akwa akwa. Ị ga-enweta akwa nhicha pụrụ iche maka ebumnuche ndị dị otú ahụ, nke dị mma karịa uwe nkịtị. Ị nwekwara ike iji ihe mkpocha ọla ọlaọcha ọ bụla ma ọ bụ ihe ncha ọlaọcha emere n'ụlọ iji na-eweghachi ncha ahụ site n'oge ruo n'oge.

Ndị mmadụ na-eyi ọla ọla ọcha kemgbe 900 BC. dabara maka mmadụ niile n'agbanyeghị afọ ma ọ bụ okike. Ya kpochapụwo mkpesa mgbe aga nke style! Ọlaọcha 925 bụ ọkọlọtọ nke ndị omenkà setịpụrụ iji gosi ọlaọcha kacha mma. Ya mere, oge ọzọ ị na-aga iburu ọla ọla ọcha jide n'aka na ọ bụ!

Ihe ịchọ mma ọla ọcha 925 1

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Kemgbe afọ 2019, zutere gị ọla na Guangzhou, China, na-emepụta ọla. Anyị bụ ihe eji achọta ọla, mmepụta na ire.


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