1I.1-rasm. AgJ kristalli sirtiga potensial aniqlovchi ionlarni tanlanib
adsobsiyalanishi
bu yerda:
m[AgJ] -
yadro
{m[AgJ] nJ
–
- agregat
{m[AgJ] nJ
–
(n x)K
+
}
–
- kolloid zarracha (granula)
xK
+
- diffuzion qavat
[
]
(
)
{
}
x
m AgJ nJ
n
x K
xK
−
−
+
+
−
- mitsella.
Agar AgNO3 ortiqcha bo‘lsa, ionli stabilizator vazifasini AgNO3 bajaradi,
granula musbat zaryadli bo‘ladi (
11.1-rasm, b), bu sistemada:
m[AgJ] - yadro
m[AgJ]nAg
+
- agregat
xNO3
–
- diffuzion qavat
{m[AgJ] nAg
+
(n-x) NO3
–
}
X+
- kolloid zarracha (granula)
[
]
(
)
{
}
3
3
x
m AgJ nAg
n
x NO
xNO
+
+
−
−
−
– mitsella
Mitsellalarning yadrolari kristall moddalardan tuzilgan bo‘ladi. Bu
kristallarning
hosil
bo‘lish
mexanizmini
1953
yilda
V.A.Kargin
va
Z.Y.Berestneva aniqladilar. Ular kolloid zarrachalarning hosil bo‘lishini
elektron
mikroskopda tekshirib, yangi nazariya yaratdilar. Bu nazariyaga muvofiq, kolloid
zarracha hosil bo‘lish mexanizmi ikki bosqichda boradi:
dastlab sharsimon
amorf kolloid zarrachalar hosil bo‘ladi, so‘ngra kolloid
sistemaning eskirishi
davomida bu zarrachalar ichida mayda kristallchalar vujudga keladi.